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