■ for Unified Threads

Unit:mm

MajorPitch DiameterMinorMajorPitch DiameterMinor
DiameterDiameterDiameterDiameter

Size Class Upper Lower Size Class Upper Lower

BasicBasicTolerance ToleranceBasicBasicBasicTolerance ToleranceBasic
SizeSize( μ m)( μ m)SizeSizeSize( μ m)( μ m)Size
P24020P36040
G564515/ 16 - 18 UNC2B7.9387.02149236.411

No. 6 - 32 UNC 3.505 2.990 2.647

2B3818GH112.70
GH112.70P24020
P240255/ 16 - 24 UNF2B7.9387.24946206.792
G56451GH112.70

No. 6 - 40 UNF 3.505 3.094 2.817

2B 36 16 P2 40 20

5/ 16 - 32 UNEF 7.938 7.422 7.079

GH112.702B4418
P24020P36040
G676643/ 8 - 16 UNC2B9.5258.49453257.805

No. 8 - 32 UNC 4.166 3.650 3.307

2B3918GH112.70
GH112.70P36040
P240203/ 8 - 24 UNF2B9.5258.83748208.379
G56451GH225.412.7

No. 8 - 36 UNF 4.166 3.708 3.401

2B 38 17 P2 40 20

3/ 8 - 32 UNEF 9.525 9.009 8.666

GH112.702B4618
P24020P36040
G676647/ 16 - 14 UNC2B11.112 9.93456279.149

No. 10 - 24 UNC 4.826 4.138 3.680

2B4220GH112.70
GH112.70P36040
P240207/ 16 - 20 UNF2B11.112 10.28751229.738
G56451GH112.70

No. 10 - 32 UNF 4.826 4.310 3.967

2B40187/ 16 - 28 UNEFP211.112 10.5234020 10.130
GH112.70P36040
P240201/ 2 - 13 UNC2B12.700 11.4305810.584 28
No. 12 - 24 UNC 2B5.4864.79843204.341GH112.70
GH112.70P36040
P240201/ 2 - 20 UNF2B12.700 11.8745211.326 23
No. 12 - 28 UNF 2B5.4864.89742194.503GH112.70
GH112.701/ 2 - 28 UNEFP212.700 12.1114020 11.717
No. 12 - 32 UNEF P25.4864.97140204.627P36040
P240209/ 16 - 12 UNC2B14.288 12.9136011.996 29
G78976GH338.1 25.4
1/4 - 20 UNC6.3505.5244.976
2B4622P36040
GH112.709/ 16 - 18 UNF2B14.288 13.3715412.761 23
P24020GH225.412.7
G676649/ 16 - 24 UNEFP214.288 13.5994020 13.142
1/4 - 28 UNF6.3505.7615.367
2B4319
Technical Inf GH112.70
P24020
1/4 - 32 UNEF6.3505.8345.491
2B4218