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Imperial Carriage Bolts.

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Imperial Carriage Bolts

What are Imperial Carriage Bolts?

Imperial Carriage Bolts feature a domed head with a square section directly underside, which can help prevent self loosening. When used to fasten within a square hole, Carriage Bolts offer a self-locking fastening solution.

These Bolts are manufactured in accordance with ANSI B18.5 and feature a minimum thread length, however Fully Thread Imperial Carriage Bolts are also available.

Imperial Carriage Bolts are available in diameters ranging from ¼” up to ¾”, with Lengths between 4.½ Inches and 18 Inches.


Manufactured in A2 Stainless Steel as standard, Imperial Carriage Bolts can also be supplied with additional finishes such as Chemical Blackening and Anti-Vibration Thread Locking Patches.

Carriage Bolts And Coach Bolts.

Though the terms are often used interchangeably, the differences between Carriage Bolts and Coach Bolts are discussed in our article what's the difference between carriage and coach bolts.

Metric Carriage Bolts.

For metric sizes, please see our range of Metric Carriage Bolts.

Bespoke Imperial Carriage Bolts Manufacture.

High precision, bespoke manufacture of Imperial Carriage Bolts to customer specification. State of the art facilities specialising in both small batch prototyping and large scale manufacture.

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