US$ 21.58
Marine screws are locked in place thanks to their "teeth" (the thread indentations will resist back-out even after prolonged vibration)
7/8-9 x 3 1/2 Flat Socket Cap Screw Alloy
the hardness rating is HRC 24-35
split bolt anchor
3/4-10 x 2 1/4 Socket Cap Screw Zinc Square Bugle Coarse Drywall Screws Black Phosphate Marine screws are locked in3 4 10 x 2 1 4 Socket Cap Screw Zinc . Alloy Socket Head Cap Screws from Brighton Best. Hardness of RC 38 43, meets or exceeds ASTM A574. Manufactured from heat treated alloy steel, 1960 series.
US$ 21.58
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US$ 29.00
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