Overall length Thread lengthThread+Neck lengthShank dia.Size of squareLength of square
L ℓℓnDsKℓk
SizeClassCodeChamferL (inch)ℓ (inch)ℓn (inch)Ds (inch)K (inch)ℓk (inch)No. of flutesType
No.10-32UNFGH2 GH3 GH4 GHY84611 Y84610 Y84010 Y84630 Y846402.5P 1.5P 2.5P2.3750.2760.8750.1940.1520.2531
5 GH6 GH7Y84040 Y84662 Y846701.5P 2.5P
No.12-24UNCGH3Y846882.5P2.3750.3540.9370.2200.1650.28131
No.12-28UNFGH3Y846892.5P2.3750.2760.9370.2200.1650.28131
GH3Y84613 Y840132.5P 1.5P
1/4-20UNCGH5Y84643 Y840432.5P 1.5P2.50.43310.2550.1910.31232
GH7Y846732.5P
GH3Y84614 Y840142.5P 1.5P
1/4-28UNFGH4 GH5Y84631 Y84644 Y840442.5P 1.5P2.50.35410.2550.1910.31232
GH6 GH7Y84664 Y846742.5P
GH3Y846152.5P
Y840151.5P
5/16-18UNCGH5Y84645 Y840452.5P 1.5P2.7180.4721.1250.3180.2380.37533
GH7Y846752.5P
GH3Y846162.5P
Y840161.5P
5/16-24UNFGH4Y84632 Y846462.5P2.7180.3941.1250.3180.2380.37533
GH5Y840461.5P
GH7Y846762.5P
GH3Y84617 Y840172.5P 1.5P
3/8-16UNCGH5Y84647 Y840472.5P 1.5P2.9370.5511.250.3810.2860.43733
GH7Y84677 Y840772.5P 1.5P
GH3Y84618 Y840182.5P 1.5P
3/8-24UNFGH4 GH5Y84633 Y84033 Y84648 Y840482.5P 1.5P 2.5P 1.5P2.9370.3941.250.3810.2860.43733
GH7Y846782.5P
Y846192.5P
GH3Y840191.5P
7/16-14UNCGH5 GH7Y84649 Y84049 Y846792.5P 1.5P 2.5P3.1560.591-0.3230.2420.40634