17. 17. Bar diameter of external threads (for thread rolling dies)

NRS-D recommendation for bar diameter

■ for metric external threads

Unit : mm recommended bar diameter ■ size

d max d min dmax dmin

Max. Min.

P dmax dmin T dmax dmin T No.0-80UNF 1.511 1.431 1.45

d d 1/16 SM 80 1.588 1.518 1.54 ×

4.541.93741.4370.50041.93041.6100.320No.1-64UNC1.8381.7431.77M30.52.642.62
441.94041.4650.47541.94041.4650.475No.1-72UNF1.8381.7511.775/64 SM 641.9841.9041.92M4×0.73.543.52
M42 341.95241.5770.37541.95241.5770.375No.2-56UNC2.1692.0662.093/32 SM 562.3812.2862.31×
M50.84.404.38
241.96241.6820.28041.94041.6400.300No.2-64UNF2.1692.0732.10SM 100 2.3812.3062.32
3/32M6×15.305.28
1.541.96841.7320.23641.95041.7800.170No.3-48UNC2.4962.3832.41
4.544.93744.4370.50044.93044.6100.320No.3-56UNF2.4962.3932.421/8 SM 403.1753.0453.08×
M81.257.107.07
444.94044.4650.47544.94044.4650.475No.4-40UNC2.8242.6952.731/8 SM 443.1753.0553.09
M45 344.95244.5770.37544.95244.5770.375No.4-48UNF2.8272.7132.743.5723.4423.47

9/64 SM 40

244.96244.6820.28044.94044.6400.300No.5-40UNC3.1543.0263.06
1.544.96844.7320.23644.95044.7800.170No.5-44UNF3.1573.0363.0711/64 SM 404.3664.2364.27

RS-D recommendation for bar diameter for metric external threads

5 47.929 47.399 0.530 47.930 47.590 0.340 No.6-32UNC 3.484 3.333 3.37 3/ SM 24 4.762 4.602 4.64 Unit : mm

16

4 47.940 47.465 0.475 47.940 47.465 0.475 No.6-40UNF 3.484 3.356 3.39 recommended bar diameter recommended bar diameter

3/16 SM 28 4.762 4.602 4.64 size size

M48 347.95247.5770.37547.95247.5770.375No.8-32UNC4.1423.9914.03Max.Min.Max.Min.
247.96247.6820.28047.94047.6400.300No.8-36UNF4.1454.0064.043/16 SM 324.7624.6024.64××
M10.250.8080.785M2.30.41.9981.968
1.547.96847.7320.23647.95047.7800.170No.10-24UNC4.8004.6184.667/SM 325.5565.3965.44
32××
No.10-32UNF4.8034.6514.69M1.10.250.9180.891M2.30.252.0962.071
15/64 SM 285.9535.7735.82××
No.12-24UNC5.4615.2795.32M1.20.251.0070.984M2.50.452.1622.126
No.12-28UNF5.4615.2965.341/4 SM 246.3506.1706.22
M1.4×0.31.1681.142M2.5×0.352.2282.196
1/4-20UNC6.3226.1176.171/SM 406.3506.2206.25
4××
1/4-28UNF6.3246.1606.20M1.60.351.3321.300M2.60.452.2622.226
5/16-18UNC7.9077.6877.74M1.7×0.351.4321.401M2.6×0.352.3182.278
5/16-24UNF7.9097.7277.77××
M1.80.351.5301.498M30.52.6272.589
3/8-16UNC9.4919.2549.31
M2×0.41.6991.669M3×0.352.7182.677
3/8-24UNF9.4979.3159.36■ ■
7/16-14UNC11.07610.81610.88M2×0.251.7961.771M4×0.53.6073.561
7/16-20UNF11.07910.87410.93××
M2.20.451.8631.827M50.54.6064.560
1/2-13UNC12.61112.38612.4

dmax dmin

1/2-20UNF 12.666 12.462 12.5

PT 1/16 - 28 7.5 7.9 PF 1/16 - 28 7.723 7.509 7.56

9/16-12UNC 14.246 13.958 14.0

9/16-18UNF14.25114.03114.1PT1/8 - 289.59.9PF1/8 - 289.7289.5149.57
5/8-11UNC15.83415.52815.6MS-RS-D recommendation for bar diameter
PT1/4 - 1912.813.4PF1/4 - 1913.15712.90713.0for miniature external threads
5/8-18UNF15.83915.61915.7Unit : mm
3/4-10UNC19.00418.67718.8PT3/8 - 1916.316.9PF3/8 - 1916.66216.41216.5

recommended bar diameter

3/4-16UNF19.01118.77418.8PT1/2 - 1420.521.3PF1/2 - 1420.95520.67120.7size
7/8-9UNC22.17621.82421.9Max.Min.
PT3/4 - 1425.926.8PF5/8 - 1422.91122.62722.7×
7/8-14UNF22.18421.92322.0S0.50.1250.4100.396
25.34924.96925.1PT1 - 1132.733.7PF3/4 - 1426.44126.15726.2×
1-8UNCS0.60.150.4940.479
1-12UNF25.35425.06525.1PT 1 1/4 - 1141.242.3PF7/8 - 1430.20129.91730.0×
S0.70.1750.5750.559
1 1/8-7UNC28.51928.10328.2PT 1 1/- 1147.148.2PF1 - 11 33.24932.88933.0
2S0.8×0.20.6580.640
1 1/8-12UNF28.52928.24028.3
1 1/4-7UNC31.69431.27831.4PT2 - 1158.760.1PF 1 1/8 - 1137.89737.53737.6×
S0.90.2250.7410.720
1 1/4-12UNF31.70431.41531.5PF 1 1/4 - 1141.91041.55041.6
1 3/8-6UNC34.86434.40234.5PF 1 1/- 11 47.80347.44347.5

2

1 3/8-12UNF34.87634.58834.7
1 1/2-6UNC38.03937.57737.7PF2 - 1159.61459.25459.3
1 1/2-12UNF38.05137.76337.8
1 3/4-5UNC44.38143.86144.0
2-4.5UNC50.72650.16850.3