CHANNEL NUTS & HARDWARE

45

METRIC CHANNEL NUTSNumbering Example: BMS 6 M

Nut Metric SuffixType Thread Size

BMS = Spring Nut 3 = M3.5 S = Short SpringBMS-D = Spring Nut (1/2” thick) 4 = M4 M = Medium SpringBMT = Twirl Nut 5 = M5 L = Long SpringBMT-D = Twirl Nut (1/2” thick) 6 = M6 * = Twirl Nuts and nutsBFN = FN Nut 8 = M8 without springs haveBMM = Spring Nut (Mini channel) 10 = M10 blank suffix

12 = M12

Reference page 44 for general fitting and standard finish specifications.

STANDARD CHANNEL NUTS

Numbering Example: N 7 25 (*) WO

Nut Type Channel Type Thread Size Stud Length SuffixN = Standard Nut 7 = Tall Channels 21 = #8-32 * = Specify Length WO = Without SpringTN = Twirl Nut B11 22 = #10-24 of stud below ** = Twirl Nuts or nutsSN = Stud Nut B12 27 = #10-32 for Stud Nut or with springs haveSTN = Stud Twirl Nut 2 = Medium Channels 24 = 1/4-20 Twirl Stud Nuts blank suffix

B22 23 = 5/16-18 3/4 = 3/4”B24 28 = 3/8-16 1 = 1”B26 26 = 7/16-14 11/4 = 11/4”B32 25 = 1/2-13 11/2 = 11/2”

5 = Short Channels 55 = 5/8-11B42 75 = 5/8-11B52 78 = 7/8-9B54B56

SPRING NUT TWIRL-NUT® FN NUT PatentedNUT WITHOUT SPRING

STUD NUT WITH SPRING STUD NUT WITHOUT SPRING TWIRL STUD NUT

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CHANNEL NUTS & HARDWARE

46 Reference page 44 for general fitting and standard finish specifications.

Part No. Thread Size Fits Channel Sizes Nut Thickness Wt./C

Lbs. kg

N221WO #8-32 All sizes except B62 & B72 1/4” (6.3) 7.0 (3.17)

N621WO #8-32 B62 & B72 .150 (3.81) 1.0 (.45)

N227WO #10-32 All sizes except B62 & B72 1/4” (6.3) 7.0 (3.17)

N627WO #10-32 B62 & B72 .150 (3.81) 1.0 (.45)

N222WO #10-24 All sizes except B62 & B72 1/4” (6.3) 7.0 (3.17)

N622WO #10-24 B62 & B72 .150 (3.81) 1.0 (.45)

N224WO 1/4-20 All sizes except B62 & B72 1/4” (6.3) 6.7 (3.04)

N624WO 1/4-20 B62 & B72 .150 (3.81) 1.0 (.45)

N223WO 5/16-18 All sizes except B62 & B72 1/4” (6.3) 6.7 (3.04)

N228WO 3/8-16 All sizes except B62 & B72 3/8” (9.5) 9.3 (4.22)

N226WO 7/16-14 All sizes except B62 & B72 3/8” (9.5) 8.8 (3.99)

N225WO 1/2-13 B11, B12, B22, B24, B26, B32 1/2” (12.7) 11.6 (5.26)

N525WO 1/2-13 B42, B52, B54, B56 3/8” (9.5) 8.8 (3.99)

N255WO 5/8-11 B11, B12, B22, B24, B26, B32 1/2” (12.7) 16.4 (7.44)

N555WO 5/8-11 B42, B52, B54, B56 3/8” (9.5) 10.2 (4.62)

N275WO 3/4-10 B11, B12, B22, B24, B26, B32 1/2” (12.7) 14.5 (6.58)

N575WO 3/4-10 B42, B52, B54, B56 3/8” (9.5) 8.8 (3.99)

N278WO 7/8-9 B11, B12, B22, B24, B26, B32 1/2” (12.7) 12.5 (5.67)

BMM-3 M3.5 x 0.6 B62 & B72 .150 (3.81) 1.0 (0.45)

BMM-4 M4 x 0.7 B62 & B72 .150 (3.81) 1.0 (0.45)

BMM-5 M5 x 0.8 B62 & B72 .150 (3.81) 1.0 (0.45)

BMM-6 M6 x 1 B62 & B72 .150 (3.81) 1.0 (0.45)

BMS-6 M6 x 1 All sizes except B62 & B72 1/4” (6.3) 6.9 (3.13)

BMS-8 M8 x 1.25 All sizes except B62 & B72 1/4” (6.3) 6.7 (3.04)

BMS-10 M10 x 1.5 All sizes except B62 & B72 3/8” (9.5) 9.6 (4.35)

BMS-12 M12 x 1.75 All sizes except B62 & B72 3/8” (9.5) 9.2 (4.17)

BMS-D-12 M12 x 1.75 B11, B12, B22, B24, B26, B32 1/2” (12.7) 12.2 (5.53)

Metric

NUT WITHOUT SPRING

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TECHNICAL DATA

4

MATERIALS

Carbon SteelChannels made from high-quality carbonsteel are continuously roll formed to precisedimensions. By cold working the steel,mechanical properties are increased, allow-ing lightweight structures to carry therequired load. Corrosion resistance of carbonsteel varies widely with coating and alloy.See “Finishes” for more detailed informa-tion.

Stainless SteelStainless steel channel is available in AISIType 304 or 316 material. Both are non-mag-netic and belong to the austenitic stainlesssteels group, based on alloy content and crys-tallographic structure. Like carbon steel,stainless steel exhibits increased strengthwhen cold worked by roll-forming.

Several conditions make the use of stainlesssteel ideal. These include reducing long termmaintenance costs, high ambient tempera-tures, appearance, and stable structural prop-erties such as yield strength, and high creepstrength.

Type 304 resists most organic chemicals,dyestuffs and a wide variety of inorganicchemicals at elevated or cryogenic tempera-tures. Type 316 contains slightly more nickeland adds molybdenum to give it better corro-sion resistance in chloride and sulfuric acid

environments. More specific informationconcerning the differences between types304 and 316 is available from B-Line.

AluminumB-Line’s standard aluminum channel isextruded from aluminum alloy 6063-T6.Strut fittings are made from aluminum alloy5052-H32.

The high strength to weight ratio of channelmade of aluminum greatly reduces the over-all cost of installation through ease of han-dling and field cutting.

Aluminum owes its excellent corrosion resis-tance to its ability to form an aluminumoxide film that immediately reforms whenscratched or cut. In most outdoor applica-tions, aluminum has excellent resistance to“weathering”. The resistance to chemicals,indoor or outdoor, can best be determined bytests conducted by the user with exposure tothe specific conditions for which it is intend-ed. The corrosion resistance of aluminum tosome commonly known chemicals is shownin the Corrosion Chart. For further informa-tion, contact B-Line Systems, Inc. or theAluminum Association.

FiberglassB-Line offers two fire retardant (FR) resinsfor strut systems, polyester and vinyl ester.Both resins are ideal for corrosive environ-ments or nonconductive applications withmoderate strength requirements.

Some common types of environments whereVinyl Ester Resins are recommended, thatPoly Esters are not, are paper mills, most anymetal plating operation and any conditionwith concentrated levels of Chlorine, [ Cl- ].Please consult our fiberglass corrosion resis-tance charts on pg. 173 for specific chemicalrecommendation data.

Unlike other base materials depicted in thiscatalog, fiberglass exhibits unique physicalproperty changes when operating in elevatedtemperature conditions, that are a fraction ofincrease compared to steel or aluminum.This being true, B-Line advises against usingfiberglass in temperatures greater than200° F.

Please refer to the "Corrosion ResistanceGuide" below for specific applications.

B-Line Fiberglass Strut systems are manufac-tured from glass fiber-reinforced plastic shapesthat meet ASTM E-84, Class 1 Flame Ratingand self-extinguishing requirements of ASTMD-635. A surface veil is applied during pultru-sion to insure a resin-rich surface and ultravio-let resistance.

While polyester is sufficient for most uses,vinyl ester is suitable for a broader range ofenvironments.

B-Lin

e B22

SS6

8740

1A6

B-Line Steel Strut is stamped every 18” with:

Traceable to the steel’s originMaterial/FinishB-Line part number designationCompany Name

CHANNEL NUTS & HARDWARE

Channel NutsB-Line’s channel nut is one of the main components of ourmetal framing system. It is designed to provide essentialgripping power and ease during installation. Channel nutsare press formed, machined and hardened from steel whichmeets the requirements of ASTM A108 or ASTM A36 forour larger sizes.

Bolts, Screws, and NutsAll bolts, screws and nuts meet the physical and chemicalrequirements of ASTM A307, SAE J429 or ASTM A563,and have unified inch screw threads (coarse, UNC). ISOmetric threads are also available on special request.

Recommended Torque

Materials & Finishes*

*Unless otherwise noted.

MetricMetric dimensions are shown in parentheses. Unlessnoted, all metric dimensions are in millimeters.

44

Bolt Size 1/4-20 5/16-18 3/8-16 1/2-13

Foot/Lbs. 6 11 19 50

Nm 8 15 26 68

Bolt Size M6x1 M8 x1.5 M10 x 1.5 M12x1.75

NM 12 17 36 62

Foot/Lbs. 9 13 27 46

FinishCode Finish SpecificationPLN Plain ASTM A108/A307 Gr. AZN Electro-Plated Zinc ASTM B633 SC1 Type IIICZ Chromium Zinc ASTM F1136 Gr. 3HDG Hot-Dipped Galvanized ASTM A153SS4 Stainless Steel Type 304 ASTM A593SS6 Stainless Steel Type 316 MPIF 35/ASTM A593AL Aluminum ASTM F468 S4

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CHANNEL NUTS & HARDWARE

50

Resistance to SlipThread Nut Part

Size Numbers 12 ga. Channel 14 ga. Channel 16 ga. ChannelLbs. N Lbs. N Lbs. N

#8-32 N221, N221WO,N521 50 220 50 220 50 220N721,TN221

#10-24 N222, N222WO, N522 100 440 100 440 100 440N722, TN222

#10-32 N227, N227WO, N527 100 440 100 440 100 440N727, TN227

1/4”-20 FN224, N224,N224WO, N524 300 1330 300 1330 300 1330N724, TN224

5/16”-18 N223, N223WO, N523 450 2000 450 2000 450 2000N723, TN223

3/8”-16 FN228, N228, N228WO, N528 800 3560 600 2670 600 2670N728, TN228

7/16”-14 N226, N226WO, N526 1000 4450 800 3560 800 3560N726, TN226

1/2”-13 N225, N225WO, N725, TN225 1500 6670 1000 4450 1000 4450N525, N525WO, TN525 1500 6670 1000 4450 1000 4450

5/8”-11 N255, N255WO, N755 1500 6670 1000 4450 1000 4450N555, N555WO 1500 6670 1000 4450 1000 4450

3/4”-10 N275, N275WO, N775 1500 6670 1000 4450 1000 4450N575, N575WO 1500 6670 1000 4450 1000 4450

7/8”-9 N278, N278WO, N778 1500 6670 1000 4450 1000 4450

RESISTANCE TO SLIP•With Safety Factor of 3•Maximum slip strength for 12 gauge channels is limited to 1550 lbs. (6670 N)

Resistance to Slipof Channel Nut

Reference page 44 for general fitting and standard finish specifications.

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CHANNEL NUTS & HARDWARE

51

Pull-Out StrengthThread Nut Part

Size Numbers 12 ga. Channel 14 ga. Channel 16 ga. ChannelLbs. N Lbs. N Lbs. N

#8-32 N221, N221WO,N521 200 890 200 890 200 890N721,TN221

#10-24 N222, N222WO, N522 250 1110 250 1110 250 1110N722, TN222

#10-32 N227, N227WO, N527 250 1110 250 1110 250 1110N727, TN227

1/4”-20 FN224, N224, N224WO, N524 450 2000 450 2000 450 2000N724, TN224

5/16”-18 N223, N223WO, N523 750 3330 750 3330 750 3330N723, TN223

3/8”-16 FN228, N228, N228WO, N528 1100 4890 1000 4450 1000 4450N728, TN228

7/16”-14 N226, N226WO, N526 1500 6670 1200 5340 1000 4450N726, TN226

1/2”-13 N225, N225WO, N725, TN225 2000 8900 1400 6230 1000 4450N525, N525WO, TN525 1500 6670 1400 6230 1000 4450

5/8”-11 N255, N255WO, N755 2000 8900 1400 6230 1000 4450N555, N555WO 1500 6670 1400 6230 1000 4450

3/4”-10 N275, N275WO, N775 2000 8900 1400 6230 1000 4450N575, N575WO 1500 6670 1400 6230 1000 4450

7/8”-9 N278, N278WO, N778 2000 8900 1400 6230 1000 4450

PULL-OUT STRENGTH•With Safety Factor of 3•Maximum pullout strength for B11 & B12 channels is limited to 1550 lbs. (6670 N).

Pull-Out Strengthof Channel Nut

Reference page 44 for general fitting and standard finish specifications.

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REFERENCE DATA

202

To Convert From To Multiply By To Convert From To Multiply By

Angle Lengthdegree radian (rad) 1.745329 x 10-2 foot (ft) meter (m) 3.048000 x 10-1

radian (rad) degree 5.729578 x 10+1 inch (in) meter (m) 2.540000 x 10-2

mil meter (m) 2.540000 x 10-5

Area inch (in) micrometer (mm) 2.540000 x 10+4

foot2 square meter (m2) 9.290304 x 10-2 meter (m) foot (ft) 3.280840inch2 square meter (m2) 6.451600 x 10-4 meter (m) inch (in) 3.937008 x 10+1

circular mil square meter (m2) 5.067075 x 10-10 meter (m) mil 3.937008 x 10+4

sq. centimeter (cm2) square inch (in2) 1.550003 x 10-1 micrometer (mm) inch (in) 3.937008 x 10-5

square meter (m2) foot2 1.076391 x 10+1

square meter (m2) inch2 1.550003 x 10+3 Volumesquare meter (m2) circular mil 1.973523 x 10+9 foot3 cubic meter (m3) 2.831685 x 10-2

inch3 cubic meter (m3) 1.638706 x 10-5

Temperature cubic centimeter (cm2) cubic inch (in3) 6.102374 x 10-2

degree Fahrenheit degree Celsius t°C=(t°F -32)/1.8 cubic meter (m3) foot3 3.531466 x 10+1

degree Celsius degree Fahrenheit t°F=1.8t°C+32 cubic meter (m3) inch3 6.102376 x 10+4

gallon (U.S. liquid) cubic meter (m3) 3.785412 x 10-3

Forcepounds-force (lbf) newtons (N) 4.448222 x 10° Section Properties

section modulus S (in3) S (m3) 1.638706 x 10-5

moment of inertia I (in4) I (m4) 4.162314 x 10-7

modulus of elasticity E (psi) E (Pa) 6.894757 x 10+3

section modulus S (m3) S (in3) 6.102374 x 10+4

moment of inertia I (m4) I (in4) 2.402510 x 10+6

modulus of elasticity E (Pa) E (psi) 1.450377 x 10-4

METRIC CONVERSION CHART

To Convert From To Multiply ByBending Moment or Torquelbf • ft newton meter (N•m) 1.355818lbf • in newton meter (N•m) 1.129848 x 10-1

N•m lbf • ft 7.375621 x 10-1

N•m lbf • in 8.850748Massounce (avoirdupois) kilogram (kg) 2.834952 x 10-2

pound (avoirdupois) kilogram (kg) 4.535924 x 10-1

ton (short, 2000 lb) kilogram (kg) 9.071847 x 10+2

ton (long, 2240 lb) kilogram (kg) 1.016047 x 10+3

kilogram (kg) ounce (avoirdupois) 3.527396 x 10+1

kilogram (kg) pound (avoirdupois) 2.204622kilogram (kg) ton (short, 2000 lb) 1.102311 x 10-3

kilogram (kg) ton (long, 2240 lb) 9.842064 x 10-4

Mass Per Unit Lengthlb/ft kilogram per meter (kg/m) 1.488164lb/in kilogram per meter (kg/m) 1.785797 x 10+1

kg/m lb/ft 6.719689 x 10-1

kg/m lb/in 5.599741 x 10-1

Mass Per Unit Volumelb/ft3 kilogram per cubic meter (kg/m3) 1.601846 x 10+1

lb/in3 kilogram per cubic meter (kg/m3) 2.767990 x 10+4

kg/m3 lb/ft3 6.242797 x 10-2

kg/m3 lb/in3 3.612730 x 10-5

lbs/ft3 lbs/in3 5.787037 x 10-4

Mass Per Unit Arealb/ft2 kilogram per square meter (kg/m2) 4.882428kg/m2 pound per square foot (lb/ft2) 2.048161 x 10-1

Pressure or Stresslbf/in2 (psi) pascal (Pa) 6.894757 x 10+3

kip/in2 (ksi) pascal (Pa) 6.894757 x 10+6

lbf/in2 (psi) megapascals (MPa) 6.894757 x 10-3

pascal (Pa) pound-force per square inch (psi) 1.450377 x 10-4

pascal (Pa) kip per square inch (ksi) 1.450377 x 10-7

megapascals (MPa) lbf/in2 (psi) 1.450377 x 10+2

Abbreviations

Defl. = Deflection

S.F. = Safety Factor

Ft. = Feet

Pre-galv. = Pre-galvanized Steel

K Factor = Deflection Divided

by load in Lbs./Ft.

o.c. = On Center

PVC = Poly Vinyl Chloride

In. = Inch

psi = Pounds per Square

Inch

wt./c = Weight pre 100 pieces

Metric Symbols

m = meter

cm = centimeter

mm = millimeter

µm = micrometer

kg = kilogram

N = newton

kN = kilonewton

Pa = pascal

MPa = megapascal

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