Details
4-40 X 5/16 FLAT SHCS ALLOY
Description
Low-profile, 82° countersunk head, flat head socket cap screws are ideal for applications requiring a strong fastener with a flush mount. Length is measured from the top of the head.
Material
Screws shall be made from alloy per ASTM F835.
Hardness
½” diameter and smaller HRC 39-45 Over ½” HRC 37-45.