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- 6-lobe flat drive style
4-40 x 5/16 Phillips Flat Undercut Thread Cutting Screw Type F Fully Threaded Black Oxide is a type of screw with a Phillips drive and a flat undercut head
or securing heavy objects
The unslotted indented hex washer head provides a secure grip during installation and prevents tampering
B3/8-16 x 5/8 MS90728, Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR MWW8Z - 6-lobe flat drive styleThe B3 8 16 x 5 8 MS90728 is an Alloy Steel B1821 Coarse Cap Screw manufactured in accordance with ASTM A354BD standards. It is designed with a 3 8 16 thread size and a length of 5 8 inches. The cap screw features a hexagonal head for easy installation and removal using a standard wrench or socket. The MS90728 designation indicates that the screw meets specific military specifications. The zinc yellow DFAR finish provides corrosion resistance and
