Product Review

✔ Meets/Exceeds: ASME 18.3-12.9
✔ Screw head: socket cap; screw drive: hex socket, known as internal hex drives
✔ 12.9 alloy steel, hardness: HRC 39-44,tensile strength: 1220 N per square millimeter (1120 N/mm²)
✔ Comes in an easy-use separated girds storage case, easy to store

Item----------Head Dia.---Head Height---Thread Length---Total Length
#6-32 x 1/4"----0.226"------0.138"--------1/4"------------0.388"
#6-32 x 3/8"----0.226"------0.138"--------3/8"------------0.513"
#6-32 x 1/2"----0.226"------0.138"--------1/2"------------0.638"
#6-32 x 5/8"----0.226"------0.138"--------5/8"------------0.763"
#6-32 x 3/4"----0.226"------0.138"--------3/4"------------0.888"

Package Quantity
#6-32 x 1/4" ----25 Pcs
#6-32 x 3/8" ----25 Pcs
#6-32 x 1/2" ----25 Pcs
#6-32 x 5/8" ----25 Pcs
#6-32 x 3/4" ----25 Pcs
Total: 125 Pcs

About Hex Socket Drive:
Hex Socket drives, also known as Internal hex drives, have a hexagonal hole in the center that requires an Allen key, also known as a hex key or Allen wrench
About Socket Cap Head:
Socket cap screws, also known as Allen head screws, have a recessed drive, and are commonly used when there is not enough clearance for a conventional wrench or socket. They are fastened with an Allen wrench, which is also called a hex wrench or hex key