Hex Tools, Allen Keys, Allen Wrenches
These hex keys (aka allen keys or allen wrenches) are made of super strong alloy steel and have a black-oxide finish. Hex is measured across the parallel flats.
Imperial Screw to Hex Key Guide:
- 2-56 = 5/64” Hex Key
- 4-40 = 3/32” Hex Key
- 5-40 = 3/32” Hex Key
- 6-32 = 7/64” Hex Key
- 8-32 = 9/64” Hex Key
- 10-32 = 5/32” Hex Key
- 1/4-20 = 3/16” Hex Key
