Black Carriage Bolts

Black Carriage Bolts, also known as round headed square neck bolts, are fasteners consisting of a head and a screw. Its head is mostly designed as a semi-circular head, and the screw part has external threads that need to be used in conjunction with a nut to fasten and connect two parts with through holes. Due to its widespread use in carriage manufacturing, this type of bolt is named "carriage bolt".

Send Inquiry

Product Description

The head of the blackened carriage bolt is circular and does not have a cross groove or hexagonal design that can be used as a power tool. This makes it difficult to easily remove the bolt even if it leaks outside during the actual connection process, thus playing a role in anti-theft. The square neck of the carriage bolt will get stuck in the groove during installation, effectively preventing the bolt from rotating and ensuring the stability of the connection.

Blackening treatment is a commonly used metal surface treatment process that forms a black oxide film on the metal surface through chemical or electrochemical methods. This oxide film not only improves the corrosion resistance of the bolt, but also enhances its aesthetics. The blackened carriage bolt adopts this surface treatment process, making it more durable and reliable during use.

Name	Black Carriage Bolts
Material	Stainless steel
Standards	GB,DIN, BSW, JIS, UNC, UNF, Non-standard, Customized Drawing
Thread	Metric Coarse, Metric Fine, UNC, UNF, BSW, BSF.
Sizes	M6-M20Metc
Finish	Black/Plain/others
Price	0.03usd/pcs-0.50usd/pcs
MOQ	Stardard item(Usually little hundred-little thousand)/determined if non-standard

Product Feature

Jinghong is a professional fastener manufacturer with over 30 years of experience in producing fasteners. With advanced production equipment, transparent prices, reliable quality, and attentive service, Jinghong provides customers with professional consultation and solutions, making it an ideal choice for home decoration and industrial maintenance.

Jinghong conducts strict quality control and safety testing on every product, and conducts safety inspections on every product in the testing workshop, fully considering safety factors during use.