FOR TRADE PRICING CALL US ON 01772 614200 - NEXT DAY DELIVERY AVAILABLE
M12 BZP CUP SQUARE CARRIAGE BOLT COACH SCREW + WASHER + NYLOC NUT, DIN 603 NYLON
M12 BZP CUP SQUARE CARRIAGE BOLT COACH SCREW + WASHER + NYLOC NUT, DIN 603 NYLON
M12 BZP CUP SQUARE CARRIAGE BOLT COACH SCREW + WASHER + NYLOC NUT, DIN 603 NYLON
M12 BZP CUP SQUARE CARRIAGE BOLT COACH SCREW + WASHER + NYLOC NUT, DIN 603 NYLON

M12 BZP CUP SQUARE CARRIAGE BOLT COACH SCREW + WASHER + NYLOC NUT, DIN 603 NYLON

Regular price £2.89 Sale

M12 BZP Cup Square Carriage Bolt (with One Zinc & Clear Washer & One Zinc Nyloc/ Locking Nut per bolt you buy)

One BZP washer + One BZP Nyloc Nut for each BZP Steel Cup Square bolt you buy.

Cup square carriage bolts DIN603 and hexagon nut DIN934 are mostly used in wood. They are fully threaded up to 100mm/ 150mm, it has a domed top and a square under the head which grips into the part being fixed, preventing the bolt from turning when the nut is tightened. Please stipulate if you require the longer thread. 

Cup Square Carriage Bolts With Hex Nut. CE APPROVED.

Per Bolt: 1x BZP Nyloc Locking Nut Manufactured to DIN985

Per Bolt: 1x BZP Washer 

A bolt mostly used in wood. A Carriage Bolt or Coach Bolt is mostly used in wood, with a domed top and a square under the head, designed to pull into the wood as the nut is tightened.  A Carriage Bolt can also be used in drilled concrete fences and gate posts to fasten wooden posts and panels.

Bright Zinc Plated (BZP) and passivated.

Domed top and a square under the head. The square section grips into the part being fixed; preventing the bolt from turning when the nut is tightened.

Conforms to DIN 571 standard.

Cup square bolts are also commonly referred to as carriage bolts or coach bolts due to their original usage in the manufacture of rolling stock. Cup square bolts consist of a domed circular head with a square neck portion and then a round shank.

The shank consists of both a plain load bearing portion as well as a threaded portion. Cup Square bolts are usually used in conjunction with a hexagon threaded nut (cup sq hex) which fastens onto the thread of the Cup square bolt.

The bolt is locked into placed by the square neck as the nut is fastened onto the stationary bolt. Cup square bolts are widely used in construction, engineering, fencing and woodworking environments.

As with hexagon headed bolts, when measuring the length of a Cup square bolt it is important to measure from the underside of the head and not to include the bolt head to the end of threaded portion.

The diameter of the cup square bolt is measured from the actual diameter of the threaded portion and not the square neck.


We are UK supply so buy with confidence.

Free UK Post via Royal Mail. Trust MultiScrew.


Please make your Cup square Carriage Bolt Size & Pack quantity selection from the drop down menu at the top of the page

Image is for illustrative purposes only.