Overall length Thread lengthThread+Neck lengthShank dia.Size of squareLength of square
L ℓℓnDsKℓk

ZELX AL SP Spiral Fluted Taps for Aluminum

SizeClassCodeChamferL (inch)ℓ (inch)ℓn (inch)Ds (inch)K (inch)ℓk (inch)No. of flutesType
7/16-14UNCGH3Y865202.5P3.9370.945-0.3230.2420.40633
1/2-13UNCGH3 GH5Y86524 Y865252.5P4.3311.142-0.3670.2750.43733
1/2-20UNFGH3Y865262.5P3.9370.866-0.3670.2750.43733