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The external sems feature allows the screw to be self-locking
even if it is subjected to vibration or shock
The 5/16-18 x 1 3/8 Hex Cap Screw Grade 8 Yellow Zinc is a high-strength fastener designed for demanding applications
Its black phosphate coating provides superior corrosion resistance
The washer has a full thread
4-40 x 5/16 MS35265, Military Drilled Slotted Fillister MS Screw Coarse Thread Cadmium D439B The external sems feature allowsThe 4 40 x 5 16 MS35265 is a military grade fillister screw with a coarse thread and a drilled slotted head. It is made of cadmium plated steel and is designed for use in aerospace and other demanding applications. The screw has a diameter of 4 40 and a length of 5 16 inches. The head is slotted for easy driving, and the coarse thread provides a secure hold in metal or other hard materials. The cadmium plating provides corrosion resistance and
