Contact RICHLINCO
40 Allen Boulevard
Farmingdale, NY 11735
Tel: (631) 694-9400
info@richlinco.com

Threading parameters

 
Threading Parameters
G33 Threading cycle K values. X Values for External Threads
Coarse Thread Series, UNC and NC
TPI Pitch = K value Size TPI Major Dia X value Minor Dia
80 0.0125            #1 64 0.073 0.0538
72 0.01389 2 56 0.086 0.0641
64 0.01563 3 48 0.099 0.0734
56 0.01786 4 40 0.112 0.0813
48 0.02083 5 40 0.125 0.0943
44 0.02273 6 32 0.138 0.0997
40 0.025 8 32 0.164 0.1257
36 0.02778 10 24 0.19 0.1389
32 0.03125 12 24 0.216 0.1889
28 0.03571 1/4 in 20 0.25 0.1887
24 0.04167 5/16 in 18 0.3125 0.2443
20 0.05 3/8 in 16 0.375 0.2983
18 0.05556 7/16 in 14 0.4375 3499
16 0.0625 1/2 in 13 0.5 0.4056
14 0.07143 9/16 in 12 0.5625 0.4603
13 0.07692 5/8 in 11 0.625 0.5135
12 0.08333 3/4 in 10 0.75 0.6273
11 1/2 0.08696 7/8 in 9 0.875 0.7387
10 0.1 1.0 in 8 1 0.8466
9 0.11111 Fine Thread Series, UNF and NF
8 0.125 Size Tpi Major Dia X Value Minor Dia
7 0.14286 0 80 0.06 0.0447
6 0.16667 1 72 0.073 0.056
5 0.2 2 64 0.086 0.0668
4 1/2 0.22222 3 56 0.099 0.0771
4 0.25 4 48 0.112 0.0864
5 44 0.125 0.0971
6 40 0.138 0.1073
8 36 0.164 0.1299
10 32 0.19 0.1517
12 28 0.216 0.1722
1/4 in 28 0.25 0.2062
5/16 in 24 0.3125 0.2614
3/8 in 24 0.375 0.3239
7/16 in 20 0.4375 0.3762
1/2 in 20 0.5 0.4387
9/16 in 18 0.5625 0.4943
5/8 in 18 0.625 0.5568
3/4 in 16 0.75 0.6733
7/8 in 14 0.875 0.7874
1.0 in 12 1 0.8978

 

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40 Allen Blvd. Farmingdale, New York 11735
Tel: (631) 694-9400 | Fax: (631) 694-9415 | info@richlinco.com