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Language
English
English
Français
Bolts
Carriage
Elevator
Flange
Hexagonal
Plow
Square
Structural A325 | A490
Nuts
ACME
Cap
Castel
Conical
Conical Flange
Coupling
Flange
Hexagonal
K-Lock
Nylon Insert
Square
Tee
Thread Cutting
Weldable
Wing
Washers
Belleville
Bevel
Countersunk
External Tooth
Fender
Internal Tooth
Lock
Push Cap
Retaining
SAE [Smaller Outside Diameter]
Thick
USS [Standard Diameter]
Socket Screws
Button Socket Head
Flat Socket Head
Set Screw
Socket Head
Shoulder Screw
Square Head Screw
Flat Torx Trailer Screw
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Collection:
Black Oxide
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33 of 1573 products
Square Head Screw Full Thread Black-Oxide Alloy Steel 5/16-18 * 1/2" Grade 8 [Cup Point] [External Square Drive]
Square Head Screw Full Thread Black-Oxide Alloy Steel 5/16-18 * 1/2" Grade 8 [Cup Point] [External Square Drive]
Regular price
2.79 $ CAD
Regular price
Sale price
2.79 $ CAD
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![Square Head Screw Full Thread Black-Oxide Alloy Steel 5/16-18 * 1/2" Grade 8 [Cup Point] [External Square Drive]](http://rjm-fasteners.myshopify.com/cdn/shop/files/Image_Jun_6__2025__11_45_43_AM-removebg-preview_953dd045-7c6a-410d-bdbd-1de9117315b0.png?v=1749225957&width=533)