Common Name Pin BaseDiameter Threads Thread Same As or
Style Size (Tapered) per in. Taper Form Interchangeable
WithUnits in. in. in./ft
2 3/8 2.876 4 2 V-0.065 2 7/8 Slim Hole(V-0.038 R) NC 26
2 7/8 3.391 4 2 V-0.065 3 1/2 Slim Hole(V-0.038 R) NC 31
Internal1 3 1/2 4.016 4 2 V-0.065 4 1/2 Slim HoleFlush (V-0.038
R) NC 38(IF) 4 4.834 4 2 V-0.065 4 1/2 Extra Hole
(V-0.038 R) NC 464 1/2 5.250 4 2 V-0.065 5 Extra Hole
(V-0.038 R) NC 505 1/2 Double Streamline
Full Hole 4 4.280 4 2 V-0.065 4 1/2 Double Streamline(FH)
(V-0.038 R) NC 40
2 7/8 3.327 4 2 V-0.065 3 1/2 Double Streamline(V-0.038 R)
3 1/2 3.812 4 2 V-0.065 4 Slim HoleExtra Hole1 (V-0.038 R) 4 1/2
Slim Hole
(XH) (EH) 4 1/2 4.834 4 2 V-0.065 4 Slim Hole(V-0.038 R) NC
46
5 5.250 4 2 V-0.065 4 1/2 Slim Hole(V-0.038 R) NC 50
5 1/2 Double Streamline
2 7/8 2.876 4 2 V-0.065 2 3/8 Internal Flush(V-0.038 R) NC
26
3 1/2 3.391 4 2 V-0.065 2 7/8 Internal FlushSlim Hole1 (V-0.038
R) NC 31(SH) 4 3.812 4 2 V-0.065 3 1/2 Extra Hole
(V-0.038 R) 4 1/2 External Flush4 1/2 4.016 4 2 V-0.065 3 1/2
Internal Flush
(V-0.038 R) NC 383 1/2 3.327 4 2 V-0.065 2 7/8 Extra Hole
(V-0.038 R)
Double 4 1/2 4.280 4 2 V-0.065 4 Full HoleStreamline (V-0.038 R)
NC 40(DSL) 5 1/2 5.250 4 2 V-0.065 4 1/2 Internal Flush
(V-0.038 R) 5 Extra HoleNC 50
26 2.876 4 2 V-0.038 R 2 3/8 Internal Flush2 7/8 Slim Hole
31 3.391 4 2 V-0.038 R 2 7/8 Internal Flush3 1/2 Slim Hole
38 4.016 4 2 V-0.038 R 3 1/2 Internal Flush4 1/2 Slim Hole
Numbered 2 40 4.280 4 2 V-0.038 R 4 Full HoleConn (NC) 4 1/2
Double Streamline
46 4.834 4 2 V-0.038 R 4 Internal Flush4 1/2 Extra Hole
50 5.250 4 2 V-0.038 R 4 1/2 Internal Flush5 Extra Hole5 1/2
Double Streamline
External 4 1/2 3.812 4 2 V-0.065 4 Slim HoleFlush (EF) (V-0.038
R) 3 1/2 Extra Hole
83 Grant Prideco. All rights reserved. December 2003
I N T E R C H A N G E A B I L I T Y C H A R T F O R A P I C O N
N E C T I O N S
Notes:1. Connections with two thread forms shown may be machined
with either thread without affecting gauging or
interchangeability.2. Numbered connections (NC) may be machined
only with V-0.038 radius thread form.
