Tap bolts are usually hex head bolts threaded up to the head, with a machined point and a fully threaded shank.

Usually of low carbon or grade 5 steel, tap bolts are used in a drilled and tapped hole that is threaded over its full length. Tap bolts are also used instead of a stud and a nut, to be screwed into some fixed part, rather than passing through the part and receiving a nut.
Unit of Measure
Items
A307 GRADE A HEX TAP BOLT, HDG, (INCH)

1/4-20 X 1 TAP BOLT A307 GRADE A GALVANIZED
Web Price QUOTE

A307 GRADE A HEX TAP BOLT, HDG, (INCH)

1/4-20 X 1 TAP BOLT A307 GRADE A GALVANIZED
Web Price QUOTE

A307 GRADE A HEX TAP BOLT, HDG, (INCH)

3/8-16 X 1 TAP BOLT A307 GRADE A GALVANIZED
Web Price QUOTE

A307 GRADE A HEX TAP BOLT, HDG, (INCH)

3/8-16 X 1 TAP BOLT A307 GRADE A GALVANIZED
Web Price $41.84

A307 GRADE A HEX TAP BOLT, HDG, (INCH)

1/2-13 X 1 1/2 TAP BOLT A307 GRADE A GALVANIZED
Web Price QUOTE
Diameter N/A 1/4 N/A 1/4 N/A 3/8 N/A 3/8 N/A 1/2
Pitch N/A Coarse
Length N/A 1 N/A 1 N/A 1 N/A 1 N/A 1 1/2
Material N/A A307 Grade A
Finish N/A Galvanized
Package Quantity N/A 100 N/A 100 N/A 1000 N/A 50 N/A 600