Skip to content

Black Oxide Fasteners

1589 products
Black Oxide Fasteners

Black oxide is a conversion coating about 1–2 µm thick, usually oiled. It adds mild corrosion resistance and keeps dimensions exact, which matters on 10.9 and 12.9 parts — there is no hydrogen embrittlement risk.

In stock now: 1,589 lines; covering Screws (700), Washers & Retaining Rings (381), Set Screws (331), Socket Head Screws (327), DIN916 (309); priced from $0.0013 per piece. Every line is sold by the piece — one piece is a valid order.

Related values on the same axis

Product families covered

Frequently asked

What is Black Oxide?
Black oxide is a conversion coating about 1–2 µm thick, usually oiled. It adds mild corrosion resistance and keeps dimensions exact, which matters on 10.9 and 12.9 parts — there is no hydrogen embrittlement risk.
How much do Black Oxide fasteners cost?
Prices in our catalogue for Black Oxide run from $0.0013 to $17.6686 per piece, depending on diameter, length and material. There is no minimum order.
Is there a minimum order quantity for Black Oxide?
No. Every line is sold by the piece, so you can order a single piece to check the fit and the finish before committing to a production quantity. Your order total is confirmed in the cart, before payment.
What do you stock in Black Oxide?
Black Oxide Fasteners currently covers 1,589 lines across Screws, Washers & Retaining Rings, Set Screws, Socket Head Screws, DIN916, Self-Tapping & Drilling Screws. The full list of sizes, materials and finishes on this page is live — use the filters at the top to narrow it down.
How quickly do you ship Black Oxide fasteners, and can you send them to the EU or Russia?
In-stock lines leave our Foshan warehouse within 24–48 hours. We ship worldwide, including the EU and Russia. For the EU we are appointing a responsible person under Regulation (EU) 2023/988 (GPSR); for EAEU orders the conformity documents are handled with the importing party, who is the applicant of record. We can supply an EN 10204 3.1 mill test certificate, a full technical specification and a packing list with weights on request.
Product Diameter × Length Material Stock Unit price
Socket Head Cap Screw with Spring & Plain Washers M5x12 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M5x12 40Cr Alloy Steel
Black Oxide
M5 × 12 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M3x12 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M3x12 40Cr Alloy Steel
Black Oxide
M3 × 12 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M12x30 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M12x30 40Cr Alloy Steel
Black Oxide
M12 × 30 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M5x10 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M5x10 40Cr Alloy Steel
Black Oxide
M5 × 10 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M3x10 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M3x10 40Cr Alloy Steel
Black Oxide
M3 × 10 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M12x25 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M12x25 40Cr Alloy Steel
Black Oxide
M12 × 25 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M5x8 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M5x8 40Cr Alloy Steel
Black Oxide
M5 × 8 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M3x8 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M3x8 40Cr Alloy Steel
Black Oxide
M3 × 8 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M12x20 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M12x20 40Cr Alloy Steel
Black Oxide
M12 × 20 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M4x50 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M4x50 40Cr Alloy Steel
Black Oxide
M4 × 50 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M3x6 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M3x6 40Cr Alloy Steel
Black Oxide
M3 × 6 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M10x70 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M10x70 40Cr Alloy Steel
Black Oxide
M10 × 70 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M3x5 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M3x5 40Cr Alloy Steel
Black Oxide
M3 × 5 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M10x60 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M10x60 40Cr Alloy Steel
Black Oxide
M10 × 60 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M2.5x20 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M2.5x20 40Cr Alloy Steel
Black Oxide
M2.5 × 20 40Cr Alloy Steel In stock Log in to see prices Log in to order
Socket Head Cap Screw with Spring & Plain Washers M10x55 40Cr Alloy Steel Socket Head Cap Screw with Spring & Plain Washers M10x55 40Cr Alloy Steel
Black Oxide
M10 × 55 40Cr Alloy Steel In stock Log in to see prices Log in to order
Request quote Email us