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REVISIONS
SYMBOL DESCRIPTION DATE APPROVAL
- KEL.cit-SEl> 3!1¥'L ~~ , ....
SHEET REVISION STATUS
SH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
REV -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --SH 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
REV -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --,ORIGINATOR 'T.~. P4
3l~h~ FSC: 5935
T.J. Perry/Paramax ~
APPROVED~~I\~ :?Iq'1L ",
"-S.E. Archer-~avies/Paramax Backshell Kits, Connector Rectangular, EMI
CODE 311 APPROV~ :;?t g/~v Shielding, strain
S.A. Naus/GSF~ Relief (Sizes 1, 2, and 3) For Space Flight Use,
CODE 311 SUPERVISOR~~"l .!ift/f1.- Detail specification For G.P. Kramer, Jr./GSF ~,
·F ...."..."
ADDITIONAL APPROVAL j -- ---- S-311-P-718/4
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION GODDARD SPACE FLIGHT CENTER GREENBELT; MARYLAND 20771
CAGE CODE: 25306 PAGE 1 OF 38
L
1. SCOPE
1.1 Purpose. This specification covers the detail prov1s10ns for connector backshell kits with strain relief capabilities, and for the suppression of radio frequency and electromagnetic interference. They are not intended to provide waterproofing and environmental sealing. The backshells covered by this specification are intended for use with electrical connectors covered by GSFC specifications delineated in Table 1.
Table 1. Backshell - connector compatibility.
Backshell Exit Hole style Compatible Size Figure Specification
Square Round (GSFC)
1 S R 1 S-311-P-718/3
2 R 2 S-311-P-718/5
3 R 3 S-311-P-718/6
1.2 General specification. Unless otherwise noted, all connector provisions and requirements of GSFC general specification S-311-P-718 and detail specifications S-311-P-718/3, S-311-P-718/5 and S-311-P-718/6 apply to this specification.
1.3 Backshell - type designations. Backshells shall be of the following type designations, and shall be ordered by their type designations only.
G
S-311-P-718/4
Exit Hole Style (1.3.2)
Backshell Kit Size (1.3.1)
GSFC Prefix (Standard for all backshell designations)
PAGE 2 REV: --
I ~
· ~-C-> .. "·~"_·~'~""_=~e.. "~c.,,,'_'''c. c·"~'~~"'.'"C' •• =z;::. '~"' . --" c' ·'·n." •• -.'L ,w-e,,,-,-.. , ",~.,;"""L,?,;"~.", . A •. -:-Ae'l
1.3.1 Backshell kit size. Select backshell kit size from Table 1.
1.3.2 Exit hole style. Select exit 'hole style from Table 1 (S for square, R for round).
2.0 APPLICABLE DOCUMENTS
The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein.
2.1 Specifications.
2.1.1 Federal.
QQ-A-200
QQ-A-250
2.1.2 Military.
MIL-A-21180
MIL-C-26074
MIL-S-5002
2.1.3 NASA/Goddard.
Aluminum Alloy, Bar, Rod, Shapes, Structural Shapes, Tube and Wire, Extruded, General Specification for
Aluminum and Aluminum Alloy Plate and Sheet, General specification for
Aluminum castings, High Strength
Coatings, Electroless Nickel, Requirements for
Surface Treatments and Inorganic coatings for Metal Surfaces of Weapons Systems.
GSFC S-311-P-718 Connectors, Electrical, Rectangular, (Power and Coaxial contacts) (Including EMI Shielding) for Space Flight Use, Detail Specification for
GSFC S-311-P-718/3 Connectors, Electrical, Rectangular, Polarized Shell, EMI Shielding, (Size 1), for Space Flight Use, Detail Specification for
GSFC S-311-P-718/5 Connectors, Electrical, Rectangular, Polarized Shell, EMI Shielding, (Size 2), for Space Flight Use, Detail Specification for
S-311-P-718/4 PAGE 3 REV: --
I
.J? .n:L!
GSFC S-311-P-718/6 Connectors, Electrical, Rectangular,
2.2 Standards.
MS16995
DOD-STD-100
MIL-STD-130
MS35275
MS35338
2.3 Other publications.
NAS1922
Polarized Shell, EMI Shielding (Size 3), for Space Flight Use, Detail Specification for
Screw,Cap, Socket Head-Hexagon, Corrosion Resisting Steel, UNC-3A.
Engineering Drawing Practices
Marking of U.S. Government Property
Screw, Machine-Drilled, Fillister Head, Slotted, Corrosion Resisting Steel, Passivated UNC-2A
Washer, Lock-Spring, Helical, Regular (Medium) Series
Clamp, Hose
2.4 Order of precedence. The order of precedence delineated in the general specification, S-311-P-718 shall apply.
3.0 REQUIREMENTS (1.2)
3.1 Materials, designs and construction. Backshells and their associated integral parts shall be of the materials, design, construction, platings, and physical dimensions as specified herein. (Figures 1 through 20) (Reference: Finishes not specified, which are known to sublimate in a hard vacuum, such as cadmium, shall not be used.)
3.1.1 Material weiaht loss (vacuum). All backshell constituent parts used shall be such that in no case will outgassing limits of 3.1.4 be exceeded when tested in accordance with GSFC S-311-P-718.
3.1.2 Materials. Materials shall be suitable for the purpose intended and as specified (see 3.1), however, when a definite material is not specified,a material shall be used which will enable the backshells to meet the performance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guarantee for acceptance of the finished product.
S-311-P-718/4 PAGE 4 REV: --
3.1.3 Backshell weight. The maximum weight of each backshell kit shall be in accordance with Figures 1, 11 and 16.
3.1.4 Vacuum effects (materials outgassing). The material outgassing limits of all materials used shall not exceed 1.0 percent in total weight loss and 0.1 percent in volatilecondensable material.
3.2 Identification marking. Each backshell housing (kit) shall be permanently and legibly marked per MIL-STD-130 with the backshell type designation and date-lot identification. constituent kit parts need not be marked with the GSFC identifier, e.g. S-311-P-718/4-1.
3.3 Performance.
3.3.1 EMI effectiveness. The EMI effectiveness provisions of GSFC S-311-P-718 apply.
4.0 QUALITY ASSURANCE PROVISIONS (1.2)
4.1 Final inspection. Each backshell kit (and constituent piece part) shall be:
a. 100% inspected per the workmanship provisions of the general specification, GSFC S-311-P-718
b. checked for critical dimensions (per applicable figure)
5.0 PREPARATION FOR DELIVERY (1.2)
6.0 NOTES (1.2)
custodian:
Code 408 Goddard Space Flight Center Greenbelt, MD 20771
S-311-P-718/4 PAGE 5 REV: --
en 1
w 1-1 1-1 I
"tI I
-...]
1-1 (X)
....... ~
~ I.'%j
0'1
~ 00
3.905 3.900
4X ¢.170 .160
3.485 _I 3.475
I.. 13.200 1 ... 1
3.220 3.210 I-A-I
r 2.235 1'i71¢·olo ®IA @jIB (fJj A I--- ~:~~g -It A
1. 6X .112-40 UNC-2B
I~ 1¢.01 0 ®IA ®IB (9)1
GIR
FIGURE 1 - BACKSHELL KIT (SIZE 1) (GIR AND GIS)
(PAGE 1 OF 4)
"'"
_ h ~ J
-E -H-il @
~ 4X
VIEW A-A
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100.
</>2.57
2. THESE BACKSHELL KITS ARE DESIGNED TO FUNCTION IN CONJUNCTION WITH GSFC NUMBER S-311-P-718/3 CONNECTOR.
3 .. FN 3, EMI GASKET, IS A CulAg FILLED SILICONE RUBBER ELASTOMER (CHO-SEAL 1215) PRODICED BY CHOMERICS INC., (CAGE CODE 18565).
4. SHIELD TERMINATION CLAMPS SUPPLIED TO BE USED IN CONJUNCTION WITH A CONDUCTIVE EPOXY OR SOLDER. ALTERNATE TERMINATION METHODS SUCH AS "MAGNEFORMING", "HEAT SHRINKABLE" RINGS AND CALIBRATED BANDING SYSTEMS MAY ALSO BE USED. BACKSHELL USERS TO SELECT TERMINATION METHOD.
5. WHEN INSTALLING BACKSHELL TO CONNECTOR, RECOMMENDED TORQUE RANGE FOR FN 6 AND FN 7 SCREWS IS 12-14 IN-LBS AND FOR FN 5 SCREWS IS 6-8 IN-LBS.
6. ALL COMPONENTS OF THIS KIT SHALL BE PACKAGED SEPARATELY AS LOOSE ITEMS TO BE ASSEMBLED BY USER.
7. MAXIMUM WEIGHT PER KIT: 1.2 POUNDS.
FIGURE 1 - BACKSHELL KIT (SIZE 1) (GIR AND GIS) (CONTD) (PAGE 2 OF 4)
-~>! or, _. I - I
S-311-P-718/4 PAGE 7 REV: --
en I
W 1-1 1-1 I
I'd I
--.l 1-1 (XI
",;..
~ (XI
~ ••
.,---~------.--~""""""'-~-----'~---"----"-------'
2.350
L (11
2.685--1
GIS
SAME AS GIR EXCEPT AS SHOWN
FIGURE 1 - BACKSHELL KIT (SIZE 1) (GIR AND GIS) (CONTD)
(PAGE 3, OF 4)
...
2.57~
11,
,
r
PARTS LIST
QTY PER ASSY FIND FIG PART OR NOMENCLATURE GIS GIR NO. NO. IDENTIFYING NO. OR DESCRIPTION
1 1 2 S-700-42/4-1 HOUSING, BACKSHELL
1 1 3 S-700-42/4-2 HOUSING, BACKSHELL
2 2 2 4 S-700-42/4-3 BRACKET, CABLE, SUPPORT
1 1 3 5 S-700-42/4-4 GASKET, EMI
2 2 4 6 S-700-42/4-5 CLAMP, CABLE
6 6 5 7 S-700-42/4-6 SCREW, CAP, SCH
4 ·4 6 8 S-700-42/4-7 SCREW, CAP, SCH
4 4 7 9 S-700-42/4-8 SCREW, CAP, SCH
2 2 8 MS35275-249 SCREW, FILLISTER
2 2 9 MS35838-137 WASHER, LOCK
1 10 NAS1922-0275-3H CLAMP, HOSE
1 11 10 S-700-42/4-9 CLAMP, HOSE, BAND
FIGURE 1 - BACKSHELL KIT (SIZE 1) (GIR AND GIS) (CONTD) (PAGE 4 OF 4)
S-311-P-718/4 PAGE 9 REV: --
CIl I
w .... .... I
'tI I
-...I .... ():)
'or::-
~ tz::I
.... o
~ 00
SEE THD DATA TABLE
3.905 3.900
3.220 3.215
I-A-I
I.. 3.485 ... 1 3.475
I~ I :OosICCf8]CbTc I 2.680 2.675
/-LI~~=l A I A
¢ .170 ,.--- 4X .160
r~fl·OO5rQ9) IcIAlb)lsCDJ
. 270 4X R.260
.170 4X R .160
R .060
I.... 1 .100
B .. SEE VIEW
,I C
R .010 MAX
ALL AROUND
~ ... B
6X .112-40 UNC-2B
/$I¢.oosl@lcIACDls (QI SEE THD DATA TABLE
I" 12X 3.200f-----f SECTION A-A
NOTE: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100.
FIGURE 2 - BACKSHELL HOUSING, ROUND HOLE (SIZE 1) (S-700-42/ 4-1) (PAGE 1 OF 2)
...
;., ":i:l,
,It
3.420 3.410
63
1-$-1.010 <DIA COlel
63
2.880 ---if---~..,.---,~---"....,.....",-..".......---. 2.870
4X R .170 .160
¢ 2.375 -.3r....-.J
1-$-1¢.030 (Q)I e I A (Q)I E (Q)I
t .060 .050
VIEW 8-8
.700 R·04O
.030
R·035 R·04O .030
R .015 020 .030 .005 (R:015 )
VIEW C SCALE 4/1 CONSTANT ALL AROUND
THREAD DATA TABLE
THREAD FORM THREAD DIMENSIONS NOMINAL THREAD SIZE AND SERIES DIAMETER BEFORE PLATING AFTER PLATING
MAJOR -.1410 - .1487 .1380 - .1462
.138-32 UNC-2B PITCH .1237 - .1264 .1177 - .1214
MINOR .1070 - .1165 .1040 .... .1140 MAJOR • 1150 - .1214 .1120 - .1189
.112-40 UNC-2B PITCH .1 018 - .1 041 .0958 - .0991
MINOR .0879 - .0964 .0849 - .0939
FIGURE 2 - BACKSHELL HOUSING, ROUND HOLE (SIZE 1) (S-700-42/4-1) (CONTD) (PAGE 2 OF 2)
S-311-P-718/4 PAGE 11 REV: --
CIl I w ..... ..... I
to I
-...I ..... (X)
" ~
~ ......
tIJ
~ ••
SEE FIGURE 2 THO DATA TABLE
3.905 3.900
3.220 3.210
I~A-I
6X .112-40 UNC....;,2B
I~ /¢.oo51®lc I A <DIs <DI SEE FIGURE 2 THD DATA TABLE
J... 3.485 .. ~ 3.475
1~I.o05 COls (Q[C]
I.... 2.680~ 2.670
I .. LO~A/ l±J
A
I I
-+-I
I
J.. 12X 3.200~
NOTE: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100 .
n. .170 .--- 4X Y-'. 160
I~ 1¢.0051(9)lc I A COls COl
.270 4X R.260
.170 4X R .160
R .060
~
ALL AROUND
~.925
I.... .100
B
." ",6~t~ .100
CONSTANT
SEE VIEW
-- I C
R .010 MAX
ALL AROUND
-..... 1'$ .... B
SECTION A-A
FIGURE 3 - BACKSHELL HOUSING. SQUARE HOLE (SIZE 1) (S-700-42/4-2) (PAGE 1 OF 2)
; ;1
~ I , , " il1 ~r
2.880 ---+....-:;:-o-::-:-:::~~~~ 2.870
I
I 2.950 3.420 3.410
1~1.010 <CIA (Dlcl -+-
I 1~1.010 <Ok' <Dlci
.060
.050
I
VIEW 8-8
~- .700 ----t
R·035 .030
R .015 .005
VIEW C SCALE 4/1 CONSTANT ALL AROUND
R·040 .030
FIGURE 3 - BACKSHELL HOUSING, SQUARE HOLE (SIZE 1) (S-700-42/4-2) (CONTO) (PAGE 2 OF 2)
S-311-P-718/4 PAGE 13 REV: --
.--------=u
,
THREAD DATA TABLE
NOMINAL THREAD TH,READ DIMENSIONS THREAD SIZE FORM AND SERIES DIAMETER BEFORE PLATING AFTER PLATING
MAJOR .1410-.1487 .1380-.1462
.138-32 UNC-2B PITCH .1237-.1264 .1177-.1214
MINOR .1070-.1165 .1040-.1140
.178 ¢.173 THRU~
j~~JAt- l"'I¢.010@A(M)ICIB~= + A [±J _ F §- - -- -- ---== l------+-~+4-~ __
':m I- 243 .I 2.41
1.620 1.600
'--------I 2.73 ~------lI-'
3.045 1-------- 3.020
-c-.250 .240
1-$-1.010 ®IBI®I 1-$-1.020 ®IBI®I
2X .138-32 UNC-2B THRU
1-$-1 (/J.O 10 <M5IB (&1)1 A (&1)1 c I SEE THD DATA TABLE
SECTION A-A
NOTE: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100.
1.010 .990 I-B-I
i
FIGURE 4 - CABLE SUPPORT. BRACKET (SIZE 1) (S-700-42/4-3)
S-311-P-718/4 PAGE 14 REV:
CIl I w I-' I-' I
I'd I
....,J I-' 0)
"~
~ t:r:!
.1-' 01
~ tt
3.475 1-'11 .. 1--- 3. 465 -~"I
1~1.010 COlA CDI
1_ 2.920 1 2.910 ..
lr .037 .027 6X ¢ .135 Il EB
1~1¢.OlO @f1®IB ®I ~ ~ I
rl2X 1.300 J
171· -$-- -:e- - -$--
~ j$1-f----------r
I~ I f$j--+- 13X 3.670]
3.900 3.895
I ~I.o TOeDIs -(QJ
3.460 3.450
I-B-I -
f$ --+--t-t-
i
: I 12x 2.800 I
.245 4X R .235
~::b==i==~-~-. -. ~
290 4X R :280
155 . 8X ¢ : 145 1 .clOoi t--
~.. 14X 3.200 1 ...-1
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100. 2. Cu/Ag FILLED SILICONE RUBBER. PURCHASE FROM CHOMERICS INC.
(CAGE CODE 18565). PART NO. CHO-SEAL 1215 (COLOR GRAY)
FIGURE 5 - EMI GASKET (SIZE 1) (S-700-42/4-4)
-.,
!---. ---------_._._------:------._----------
---~-------------
...
~Il ~:
il; ~
'jl'
.164-32 UNC-2B THRU
1$1¢.012 @IB @Ic @IAI SEE THO DATA TABLE
3.495 f .500 Ir"4I1----- 3.485 ------~ I-B-I ~ I-c-I _--,--r .25
--$--+--
t 1-------1 3.195 !---------I-.{
o .182 THRU .174
\$\¢.012 @IB @Ic @IA\
.94 1.28
.164-32 UNC-2B 3 HOLES THRU SEE THO DATA TABLE
47 0
A6~_--"T+-r-_,< __ 2~X~4~3~0:~~:~~_2_X_R_:g_g_g-,-; ~ 2X .338
2X R .13 MAX
[ (.250) R
THREAD
THREAD FORM
1.122
2X .185
DATA TABLE
THREAD DIMENSIONS NOMINAL THREAD SIZE AND SERIES DIAMETER BEFORE PLATING AFTER PLATING
MAJOR .1670 -
.164-32 UNC-2B PITCH .1497 -MINOR .1330 -
NOTE: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100.
.1748 .1640 - .1723
.1525 .1437 - .1475
.1415 .1300 - .1390
FIGURE 6 - CABLE CLAMP (SIZE 1) (S-700-42/4-5)
-,-- ! -r' - I 1
[
I
S-311-P-718/4 PAGE 16 REV: --
CIl I w I-' I-' I
ttl I
-...J I-' (»
....... ~
:;g G'l t:tj
I-' -...J
~ <: II
,.. .., (0. 183 ) .176
63 o .080~ .070
1-$-10 .0051A @I
R .020 .010
.265J~
.275 '400
( .112) .108
,.. .470 _, .500
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100. 2. MAKE FROM MS 16995-11 . 3. AFTER MODIFICATION, PASSIVATE PER MIL-S-5002.
.112-40 UNC-3A·
t
l0·1380 .1320
(MAJOR DIA)
I-A-I
FIGURE 7 - SOCKET HEAD CAP SCREW, MODIFIED (SIZE 1) (S-700-42/4-6)
--"-------------
~ I"
"
" rl, ,~,f1
11 ~
(J) I
w ~ ~ I
I'd I
...,J ~ 00
" ,j::o.
~ txl
. ~ 00
~ ..
1- .. 1 (0 .226) .218
63 o .095~ .085
'/-$-10.010 @IA@I
(.138 ) .134
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100. 2. MAKE FROM MS 16995-18.
TOOL CENTER POINT OPTIONAL
.138-32 UNC-3A
.265JY
.275 '40°
1-"'11 .470 _I .500
3. AFTER MODIFICATION, PASSIVATE PER MIL-S-5002 .
FIGURE 8 - SOCKET HEAD CAP SCREW, MODIFIED (SIZE 1) (S-700-42/4-7)
----~-.--.--~---.. - .-.-"---.-.-.---~~--------------.-
L 0 .1380 .1320
(MAJOR DIA)
I-A-I
~ I.
---------------------- --.-.---~--.-
.11 II
CJ) I
w I-' I-' I
"tI I
" I-' ():)
........ ~
~ I-' \0
~ <l ••
,... .., (0.226 ) .218
63 o .095~ .085
1-$-·10-.0'-0 @IA-@l
( .138 ) .134
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100. 2. MAKE FROM MS16995-18.
TOOL CENTER POINT OPTIONAL
.138-32 UNC-3A
----------<
.265J~
.275 '400
1 .720 -I .. .750
3. AFTER MODIFICATION, PASSIVATE PER MIL-S-5002.
FIGURE 9 - SOCKET HEAD CAP SCREW, MODIFIED (SIZE 1) (S-700-42/4-8)
L 0. 1380 .1320
(MAJOR DIA)
/-A-/
....
•
r
---.11'-- (.025)
3.30
...----11-- 4 X R .23
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100.
2. MAKE FROM NAS1922-0450-3H.
l .306 r(·330)
( 18-8 SST) PASSIVATED
&. CLAMPS WITH CURVED SHAPE MUST BE GROUND FLAT AS SHOWN.
FIGURE 10 - CLAMP, HOSE, BAND. MODIFIED (SIZE 1) (S-700-42/4-9)
S-311-P-718/4 PAGE 20 REV: --
:~~i
!
S-311-P-718/4
t
, ... .-_- 2.11 0 --,,-----<~
/'
SHIELD TERMINATION AREA
FIGURE 11 - BACKSHELL KIT, (SIZE 2) (G2R) (PAGE 1 OF 3)
PAGE 21 REV: --
--~ I - ... 'i
en I
w I-' I-' I
to I
-...J I-' ():)
......... ,r:..
~ ~ N N
~ ..
1 .. 1 1 .650 1 .. I
1.8251 0.900
13FPP .016 <fJ)TA C&1)Ts <@]
1.081 I... "I 1.091
1-8-1
1.7751
I'" 11.5501 .. I
VIEW A-A
2.373
8X .138-32 UNC-28 I~ I¢ .006 <@IA (9)1 B <Mll
VIEW B- B
FIGURE 11 - BACKSHELL KIT, (SIZE 2) (G2R) (CONTO) (PAGE 2 OF 3)
...
jill
en I
w I-' I-' I
I'd I
...,J I-' ()!)
" tI:>o
PARTS LIST
1 7 NAS1922-0125-1 CLAMP, HOSE, BAND
2 6 MS35338-135 WASHER, SPLIT
2 5 MS35275--217 SCR, FILLISTER, HD
8 4 $-700-42/4-13 SCR, CAP, SCH, MOD
1 3 S-700-42/4-12 GASKET, EMI
2 2 S-700-42/4-11 CLAMP, CABLE
S-700-42/ 4-10 BACKSHELL, EMI
~PKGI CAGE I PART OR NOMENCLATURE QlY PER />SSY NO. CODE IDENTIFYING NO. OR DESCRIPTION
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100.
2. THESE BACKSHELL KITS ARE DESIGNED TO FUNCTION IN CONJUNCTION WITH GSFC S-311-P-718/5 CONNECTOR.
I
I
FN 3, EMI GASKET, IS A Cu/Ag FILLED SILICONE RUBBER ELASTOMER (CHO-SEAL 1215) PRODUCED BY CHOMERICS INC., (CAGE CODE 18565).
SHELL TERMINATION CLAMPS SUPPLIED TO BE USED IN CONJUNCTION WITH A CONDUCTIVE EPOXY OR SOLDER. ALTERNATE TERMINATION
. METHODS SUCH AS "MAGNEFORMING", "HEAT SHRINKABLE" RINGS AND CALiBRATED BANDING SYSTEMS MAY ALSO BE USED. BACKSHELL USERS SHOULD SELECT TERMINATION METHOD.
WHEN INSTALLING BACKSHELL TO CONNECTOR, RECOMMENDED TORQUE RANGE FOR FN 4 SCREWS IS 12-14 IN-LBS.
MAXIMUM WEIGHT PER KIT - 0.6 POUNDS.
ALL COMPONENTS OF THIS KIT SHALL BE PACKAGED SEPARATELY AS LOOSE ITEMS TO BE ASSEMBLED BY USER.
MATERIAL
FIGURE 11 - BACKSHELL KIT, (SIZE 2) (G2R) (CONTD) (PAGE 3 OF 3)
-------------- --~~--.---- ----.. --~--
..
I SPECIFICATION
...." ...
iH
_._----_ .. _----_,'
2.370
1~\.010@\A @\S\
4X R .125
8X .138-32 UNC-2B
I$I¢ :006-(fJ)ls {~IA®IC I SEE THO DATA TABLE
THREAD
NOMINAL THREAD THREAD
SIZE AND SERIES FORM DIAMETER
MAJOR
.138-32 UNC-2B PITCH
MINOR
NOTE: UNLESS OTHERWISE SPECIFIED 1. INTERPRET PER 00D-STD-100.
'-----I 1 .650 I---~
4X R .250
J.-.-~ 1 .550 -----'
DATA TABLE
THREAD DIMENSIONS
BEFORE PLATING AFTER PLATING
.1410 - .1487 .1380 - .1462
.1237 - .1264 .1177 - .1214
.1040 - .1140 .1070 - .1165
FIGURE 12 - BACKSHELL HOUSING, ROUND HOLE (SIZE 2) (S-700-42/4-10) (PAGE 1 OF 3)
S-311-P-718/4 PAGE 24 REV: --
400
2X 380
CONSTANT
1.600
I-A-I
t
R .040-+----.
t---- 2.090 __ ~ 2.080
VIEW B SCALE: 4/1 CONSTANT ALL AROUND
2X 0 .130 .125
R .040
\-$-\¢ .005 (M)\A @Is (M)I c I
.185
BLEN 0 -1--1---7
RADIUS
1.685 ~- 1.675
SEE VIEW B
\-$-1.0 10<fJ>IA<fJ>1 s<fJ>\ c I 2X R .060 CONSTANT
SECTION A-A
FIGURE 12 - BACKSHELL HOUSING, ROUND HOLE (SIZE 2) (S-700-42/4-10) (CONTO) (PAGE 2 OF 3)
S-311-P-718/4 PAGE 25
c +-,
~ C
REV: --
1.360 -;--------.j '--'1 $""'1:-::. OC-:-1 0~@~1 A-:----=®"'I"'='sl
2X .210 .200
4 X R . 1 00 ---Ir--f---.
2X .160 -t----~
f
t---- 1.860 --_
1$1~010 @IA ®Isl
VIEW C-C
63 '---''''-- 0 . 905
.895
FIGURE 12 - SACKSHELL HOUSING, ROUND HOLE (SIZE 2) (S-700-42/ 4-10) (CONTD) (PAGE 3 OF 3)
S-311-P-718/4 PAGE 26
t· ! T -- - -! 1
REV: --
en I
w I-> I-> I
"tI I
...J I-> ~
........ ~
~ t:J:j
tv ...J
~ ..
540 R :530
1-$10.010 <&DIB ®IAI
0 ·140 .135
l~fW])65-~B @IAlcl -A-
'A 2X .080
2X .205
2X .230
THREAD DATA TABLE
NOMINAL THREAD THREAD THREAD DIMENSIONS SIZE AND SERIES FORM
DIAMETER BEFORE PLATING AFTER PLATING
MAJOR .11 50 - . 1 21 4 .1120 - .1189 .112-40 UNC-2B PITCH . 1 01 8 - .1 041 .0958 - .0991
MINOR .0879 - .0964 .0849 - .0939 -~-~--- .. -------- --------
NOTE: UNLESS OTHERWISE SPECIFIED 1. INTERPRET PER DOD-STD-100 .
FIGURE 13 - CABLE SUPPORT CLAMP. (SIZE 2) (S-700-42/4-11)
1.790
I-B-I
-."
~REAK EDGE
45 0 X .030 TYP
%
SECTION A-A
'!'- - ---.~---.------~-------------------------__ ~_r _________ ._. _________ _
;11
--il-- .037 \I .027
t
1.850 r t---- 1.840
1-$-1.010 <&PI A ®I
-r----l 1 . 650 f------;~
I
4X R .250 .240
2.368 2.365 1.900
1.895
I-B-I --+-- 1-$-I.o1o@IB ·®I
I I
I
4X R .125
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER 000-5TO-100.
ax 0.155 .145
2. Cui Ag FILLEO SILICONE RUBBER ELASTOMER, PURCHASE FROM CHOMERICS INC., (CAGE CODE 18565). PART NO. CHO-SEAL 1215 (COLOR-GRAY).
FIGURE 14 - EMI GASKET, (SIZE 2) (S-700-42/4-12)
S-311-P-718/4 PAGE 28 REV: --
---.-- ! .
til I w I-' I-' I ~ I
...:J I-' (Xl
......... ,j:>.
~
~ t%j
tv \0
~ ..
I... -I (0.226 ) .218
o .095 63 .085 V
I ~ 10.0051AJ&Dl
( .138 ) .134
NOTES: UNLESS OTHERWISE SPECIFIED
1 . INTERPRET PER DOD-STD-100. 2. MAKE FROM MS16995-18.
.160JY
.170 '400
I... .345 ~I .375
3. AFTER MODIFICATION, PASSIVATE PER MIL-S-5002.
Ir---T 1380 I L 0 '1320
(M~JOR DIA)
I-A-I
FIGURE 15 -. SOCKET HEAD CAP SCREW, MODIFIED (SIZE 2) (S-700-42/4-13)
.,--:-c----------,------___ . ____ . _. _____ _
-.,
.:I!
,
t
2 2X B
+i
2X .203
o .-J
B 4 A
SHIELD TERMINATION AREA
1-
FIGURE 16 - BACKSHELL KIT, (SIZE 3) (G3R) (PAGE 1 OF 3)
.160
S-311-P-718/4 PAGE 30 REV: --
" , ''':''i :1
'I I Ii Ii II I' II II Ii II "
j II I ,I
I [I !I II
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l1.l I
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~ I 0.603
I~ I .010 (9)1 A (9)1 B @I
~ ·W
I-'
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1.443
I-A-/ 2.003
I.... .. " 12X .969
VIEW A-A VIEW B-B
FIGURE 16 - BACKSHELL KIT, (SIZE 3) (G3R) (CONTD)
(PAGE 2 OF 3)
..;-- .. --~-------~-------.-----.- --"~---"-"---"- -.,----""~.- ~.----
-.,
~11
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w I-' I-' I
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......... ,j:>.
~ W N
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PARTS LIST
1 7 NAS1922-0075-3 CLAMP, HOSE, BAND
2 6 MS35338-135 WASHER, SPLIT
2 5 MS35275-217 SCR, FILLISTER, HD
8 4 20 S-700-42/4-17 SCR, CAP, SCH, MOD
1 3 19 S-700-42/4-16 GASKET, EMI
2 2 18 S-700-42/4-15 CLAMP, CABLE
17 S-700-42/4-14 BACKSHELL, EMI
~PKG CAGE PART OR NOMENCLATURE OTY PER ISS( NO. CODE IDENTIFYING NO. OR DESCRIPTION
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100.
2. THESE BACKSHELL KITS ARE DESIGNED TO FUNCTION IN CONJUNCTION WITH GSFC S-311-P-718/6 CONNECTOR.
3. FN 3 EMI GASKET, IS A Cu/Ag FILLED SILICONE RUBBER ELASTOMER (CHO-SEAL 1215) PRODUCED BY CHOMERICS INC., (CAGE CODE 18565).
4. SHELL TERMINATION CLAMPS SUPPLIED TO BE .USED IN CONJUNCTION WITH A CONDUCTIVE EPOXY OR SOLDER. ALTERNATE TERMINATION METHODS SUCH AS II MAGNEFORMING", II HEAT SHRINKABLE" RINGS AND CALIBRATED BANDING SYSTEMS MAY ALSO BE USED. BACKSHELL USERS SHOULD SELECT TERMINATION METHOD.
5. WHEN INSTALLING BACKSHELL TO CONNECTOR, RECOMMENDED TORQUE RANGE FOR FN 4 SCREWS IS 6-8 IN-LBS.
6. MAXIMUM WEIGHT PER KIT - 0.4 POUNDS.
7. ALL COMPONENTS OF THIS KIT SHALL BE PACKAGED SEPARATELY AS LOOSE ITEMS TO BE ASSEMBLED BY USER.
MATERIAL
FIGURE 16 - BACKSHELL KIT, (SIZE 3) (G3R) (CONTD)
(PAGE 3 OF 3)
SPECIFICATION
... "------~.----------.-- •• --~ •• _~ ___ w_~ __________ _
",.
.. -.--.-----:-...::.:..=.::=..::;:=~~
f
1.270 --If----------l 8X .112-40 UNC-2B
r-':\ ~-"'\-. 0-04-(M)~\ B-:(M)"""'I I~ \0.008 <0>\A ®IB ®l C I
SEE THO DATA TABLE
2X 1.672 2.000
..---l+-+l-I-- 4 X R . 1 88
4X R .125 ~--__ ~-l 2X.969
.-J A
NOMINAL THREAD THREAD DIMENSIONS THREAD SIZE FORM AND SERIES DIAMETER BEFORE PLATING AFTER PLATING
MAJOR . 11 50 - .1 21 4 .11 20 - .1189
.112-40 UNC-28 PITCH . 101 8 - . 1 041 .0958 - .0991
MINOR .0879 - .0964 .0849 - .0939
NOTE: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100.
FIGURE 17 - 8ACKSHELL HOUSING, ROUND HOLE (SIZE 3) (S-700-42/4-14) (PAGE 1 OF 3)
S-311-P-718/4 PAGE 33 REV:--
t----- 2.090 __ ~~ 2.080
t---- 1.685 ----t~ 1.675
1.000 .100
I'
2X .125
2X .130 .125
1$1¢.010 @IA ®Icl
2X .210 .200
1.545 1.535 1.440
I-A-I 1-$-1.010 @IA®lc I BLEND. RADIUS
.800
SEE VIEW B
R .030 CONSTANT
R .060 CONSTANT
SECTION A-A .165
FIGURE 17 - BACKSHELL HOUSING, ROUND HOLE (SIZE 3)
(S-700-42/4-14) (CONTD)
(PAGE 2 OF 3)
S-311-P-718/4 PAGE 34 REV: --
R .015 .005
~_ .685_---.l .675
VIEW B
11
R .040
.060
.050
0.600
1~\¢.010 @\A @\B @\cl
l L. 100
.080
FIGURE 17 - BACKSHELL HOUSING, ROUND HOLE (SIZE 3) (S-700-42/4-14) (CONTD)
(PAGE 30F 3)
S-311-P-718/4 PAGE 35 REV: --
C/l I
w I-' I-' I
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........ ~
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W 0'1
~ ..
,,----------
2X R .12
2X .300
-C-~ .075
2X .065
R .500
'A 1.540
I-B-I
2X .230
/1 L.250
~ I-A-J 0. 140
.135
I~ I¢ .005 (£)1 A @[BWcl
I M !-2X
,T2X .125
.320 ~
.300
THREAD DATA TABLE
NOMINAL THREAD THREAD THREAD DIMENSIONS SIZE AND SERIES FORM
DIAMETER BEFORE PLATING AFTER PLATING _ .
MAJOR . 1 1 50 - . 1 21 4 .11 20 - .1189
.112-40 UNC-2B PITCH .1 01 8 - . 1 041 .0958 - .0991
MINOR .0879 - .0964 .0849 - .0939 - --- ---- -- - -- --- ----------- --
NOTE: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100,
FIGURE 18 - CABLE SUPPORT CLAMP (SIZE 3) (S-700-42/4-15)
....."
~REAK EDGE
450
X .030 TYP
SECTION A-A
....
'::!,'
" i' i
'~ll ! ',j,i
,;; :11
.,..----~~.-.--
(Jl I
w t-' t-' I
"C I
'-l t-' 00
........ ~
~ I::tj
W '-l
~ ..
1.260 1.250 I.. -I
1~1.010 (9)IB (9)1
11-- .037 I .027
1.990 1.980
1~1.010 <&1)1 A (f0)1
1.560 1.550
I-B-I
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER 000-STO-100.
+
2. CulAg FILLED SILICONE RUBBER ELASTOMER, PURCHASE FROM CHOMERICS INC., (CAGE CODE 18565), PART NO. CHO-SEAL 1215 (COLOR-GRAY).
135 8X 0: 125
1~1¢.010 @IA ®IB @I
4X R .178
4X R .135
FIGURE 19 - EMI GASKET (SIZE 3) (5-700-42/4-16)
...
~j; 'I' ~
~ji i; f. { ;~i
.~
Cf.I I
w I-' I-' I
"d I
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"-01=>0
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~ 00
~.~.---.--.- ... ~ -- --.. ------------~. --._._---------------
1_ "'1 (0 .1 83 ) .176
o .080 63 .070 V 1
1$10.010 @IA@I
(.112) .108
NOTES: UNLESS OTHERWISE SPECIFIED
1. INTERPRET PER DOD-STD-100. 2. MAKE FROM MS 16995-10.
, .112-40
TOOL CENTER POINT OPTIONAL
.160J~ .170 40°
I_ .345 _I .375
3. AFTER MODIFICATION, PASSIVATE PER MIL-S-5002.
L 0 ·1120 .1069
(MAJOR DIA)
I-A-I
FIGURE 20 - SOCKET HEAD CAP SCREW, MODIFIED (SIZE 3) (S-700-42/4-17)
j ..Ii I