Product Review

✔ Meets/exceeds: ANSIB18.3BT, UNC threads
✔ Stainless steel 304, high strength and anti-corrosion in various environments
✔ Screw head style: button; screw drive style: hex socket, known as internal hex drives
✔ These screws come in an easy-use separated girds storage case

Item----------------Head Dia.----------Head Height---------Thread Length-------Total Length
1/4-20 x 3/8"-------------7/16"--------------1/8"-----------------3/8"--------------- 1/2"
1/4-20 x 1/2"-------------7/16"--------------1/8"-----------------1/2"--------------- 5/8"
1/4-20 x 5/8"-------------7/16"--------------1/8"-----------------5/8"--------------- 3/4"
1/4-20 x 3/4"-------------7/16"--------------1/8"-----------------3/4"--------------- 7/8"
1/4-20 x 1"---------------7/16"--------------1/8"-----------------1"---------------- 1-1/8"

Package Contains:
1/4-20 x 3/8"--------------10 Pcs
1/4-20 x 1/4"--------------10 Pcs
1/4-20 x 5/8"--------------10 Pcs
1/4-20 x 3/4"--------------10 Pcs
1/4-20 x 1"----------------10 Pcs
Total: 50 Pcs

About Hex Socket Drives
 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 Button Head
 Button head screws are similar to standard pan head screws but have a curved top