Tap Bolt, FT, GRADE 8 Yellow Zinc Chromate 1/2"-13 x 3/4" Length, 25 pc

Head Width  3/4"

Head Height  11/32"

Thread Length Full

Length is measured from under the head.

Grade 8 head marking of 6 radial lines

Class 2A Thread

ASME B18.2.1, SAE J429