No. 6-40 UNF x 1/4" Countersunk Screw allen key

No. 6-40 UNF x 1/4" Countersunk Screw allen key

Hex Socket Countersunk Screw – UNF Fine Thread

American fine thread (UNF)

40 threads per inch (40 TPI)

Standards: ASME/ANSI B18.3-2002, ASTM A574

Hardness: 38–43 HRC

Fit class: 3A

Material: heat-treated alloy steel, 1960 series

Comparable to DIN 7991

Dimensions

Overall length including head: 1/4" (6.35 mm)

Thread diameter: 3.51 mm

Hex socket size (across flats): 5/64"

Applications: Ideal for use in vehicles, motorcycles, boats, aircraft, and archery.

Tip: Suitable for compound and recurve bows, archery, sight mounts

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