SizeClassCodeChamferLℓnDsKℓkNo. of Type
(inch)(inch)(inch)(inch)(inch)(inch)flutes

For Unified Threads

No.2-56UNCGH2Y826234.5P1.750.2560.4370.1410.110.18721
No.3-48UNCGH2Y826004.5P1.8120.2950.50.1410.110.18721

GH2 Y82601 GH3 Y82602

No.4-40UNC 4.5P 1.875 0.335 0.562 0.141 0.11 0.187 2 1

GH4 Y82612 GH5 Y82634

No.4-48UNFGH2Y826834.5P1.8750.3350.5620.1410.110.18721
No.5-40UNCGH2Y826034.5P1.9370.3740.6250.1410.110.18731

GH2 Y82604 GH3 Y82605 GH4 Y82608

No.6-32UNC 4.5P 2 0.413 0.687 0.141 0.11 0.187 3 1

GH5 Y82635 GH6 Y82659 GH7 Y82665 GH2 Y82684

No.6-40UNF 4.5P 2 0.413 0.687 0.141 0.11 0.187 3 1

GH3 Y82642 GH2 Y82606 GH3 Y82607 GH4 Y82629

No.8-32UNC 4.5P 2.125 0.453 0.75 0.168 0.131 0.25 3 1

GH5 Y82637 GH6 Y82660 GH7 Y82667

No.8-36UNF GH2 Y82686 4.5P 2.125 0.453 0.75 0.168 0.131 0.25 3 1

GH3 Y82609 GH5 Y82639

No.10-24UNC 4.5P 2.375 0.531 0.875 0.194 0.152 0.25 3 1

GH6 Y82690 GH7 Y82669 GH2 Y82611 GH3 Y82610 GH4 Y82630

No.10-32UNF 4.5P 2.375 0.531 0.875 0.194 0.152 0.25 3 1

GH5 Y82640 GH6 Y82661 GH7 Y82670

No.12-24UNCGH3Y826884.5P2.3750.5710.9370.2200.1650.28131
No.12-28UNFGH3Y826894.5P2.3750.5710.9370.2200.1650.28131

GH3 Y82613 GH5 Y82643

1/4-20UNC 4.5P 2.5 0.591 1 0.255 0.191 0.312 3 2

GH6 Y82590 GH7 Y82673 GH3 Y82614 GH4 Y82631

1/4-28UNF GH5 Y82644 4.5P 2.5 0.591 1 0.255 0.191 0.312 3 2

GH6 Y82662 GH7 Y82674 GH3 Y82615

5/16-18UNC GH5 Y82645 4.5P 2.718 0.669 1.125 0.318 0.238 0.375 3 3

GH7 Y82675 GH3 Y82616

5/16-24UNF 4.5P 2.718 0.669 1.125 0.318 0.238 0.375 3 3