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Coach Bolts 224 Items

Coach Bolts

Coach Bolts – A Tradefix Direct Guide

Coach bolts (aka carriage bolts or cup square bolts) are a staple construction fixing, ideal for timber to timber applications, and for attaching ironmongery to wood. But with so many options to choose from, how you decide which coach bolt is right for you? Here’s our guide.

When should I use coach bolts?

Coach bolts are the natural choice for most large building projects and can be suitable for interior and exterior applications. They are typically used at critical points within a structure to join wood to wood or wood to metal. They offer a far more secure option than nails, screws and many other bolt types.

Coach bolt sizes

You’ll see the product descriptions of our coachbolts have two dimensions: size and length. The length is obvious enough, but what does M8, M12 etc mean? M is simply the metric diameter of the bolt, so an M10 bolt has a thread diameter of 10mm, an M16 bolt is 16mm wide. Note that the M measurement applies to the thread, not the head of the bolt, which is always wider.

Parts of a coach bolt

Head: That broad head doesn’t just look good. It’s there to spread the surface load of the bolt so it doesn’t damage the wood or other material you’re bolting. For extra protection, consider choosing a washer.

Square section: Beneath the domed head, at the top of the shank is a short square block. It is designed to be countersunk into the timber and ensures that when the nut is tightened the bolt grips the timber and doesn’t simply spin. This part is what gives coach bolts yet another name: cup square bolts.

Shank: Take a close look at our Timco coach bolts and you’ll see a portion of the shaft is unthreaded. The same is true for some of our unbranded carriage bolts too. Why is that? A shank helps the bolt pull together the materials it is fixing. It also helps reduce friction and should make it easier to remove the bolt.

Which finish do I need?

Our coach bolts are available in a range of materials/finishes. Zinc plated bolts are typically the lowest cost option. Galvanised coach bolts are also, rather confusingly, zinc coated but the coating is thicker and offers greater protection. Stainless steel coach bolts are the most durable of all, because the corrosion resistance comes not from the coating but from the composition of the bolt (which combines steel with chromium).

Indoors and where the environment is dry and not subject to humidity, any of the bolts should be suitable. If you need coach bolts for exterior applications, or in damp or humid environments, galvanised bolts will offer greater corrosion resistance than zinc coated, whilst stainless steel would be the most durable option of all.

Buy coach bolts

No other UK coach bolts supplier offers a better combination of range, quality and value. Order your bolts now or, if you’re not sure which is the right bolt for your application, call us on 0161 794 1783. We’ll be happy to help.

 
 
Code: ZCB047 View
Zinc Plated Coach Bolts and Nuts - M12 x 130mm (Qty: 10)
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£4.87

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Code: ZCB050 View
Zinc Plated Coach Bolts and Nuts - M12 x 180mm (Qty: 10)
Pack
£6.24

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There are only 3897 of this item in stock.

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Code: ZCB048 View
Zinc Plated Coach Bolts and Nuts - M12 x 150mm (Qty: 10)
Pack
£5.78

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There are only 38 of this item in stock.

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Code: ZCB052 View
Zinc Plated Coach Bolts and Nuts - M12 x 220mm (Qty: 10)
Pack
£7.69

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There are only 340 of this item in stock.

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Code: ZCB12120 View
Zinc Plated Coach Bolts and Nuts - M12 x 120mm (Qty: 10)
Pack
£4.87

Limited Stock

There are only 38 of this item in stock.

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If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: ZCB046 View
Zinc Plated Coach Bolts and Nuts - M12 x 110mm (Qty: 25)
Pack
£9.47

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There are only 299 of this item in stock.

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Code: 0875CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M8 x 75mm (Qty: 10)
Pack
£6.55

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There are only 360 of this item in stock.

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Code: 10130CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M10 x 130mm (Qty: 10)
Pack
£13.21

Limited Stock

There are only 338 of this item in stock.

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Code: 10180CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M10 x 180mm (Qty: 10)
Pack
£15.25

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There are only 270 of this item in stock.

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Code: 06100CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M6 x 100mm (Qty: 10)
Pack
£5.24

Limited Stock

There are only 501 of this item in stock.

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Code: 10120CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M10 x 120mm (Qty: 10)
Pack
£12.48

Limited Stock

There are only 296 of this item in stock.

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Code: 08150CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M8 x 150mm (Qty: 10)
Pack
£9.86

Limited Stock

There are only 543 of this item in stock.

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Code: 1075CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M10 x 75mm (Qty: 10)
Pack
£9.86

Limited Stock

There are only 530 of this item in stock.

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If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: 10150CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M10 x 150mm (Qty: 10)
Pack
£13.74

Limited Stock

There are only 294 of this item in stock.

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If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: 12100CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M12 x 100mm (Qty: 10)
Pack
£15.65

Limited Stock

There are only 350 of this item in stock.

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If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: 1275CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M12 x 75mm (Qty: 10)
Pack
£13.80

Limited Stock

There are only 359 of this item in stock.

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If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: 08100CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M8 x 100mm (Qty: 10)
Pack
£7.25

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There are only 489 of this item in stock.

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Code: 10100CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M10 x 100mm (Qty: 10)
Pack
£11.17

Limited Stock

There are only 490 of this item in stock.

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If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: 12130CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M12 x 130mm (Qty: 10)
Pack
£17.89

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There are only 330 of this item in stock.

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If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: 0640CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M6 x 40mm (Qty: 10)
Pack
£3.94

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There are only 540 of this item in stock.

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Code: 0650CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M6 x 50mm (Qty: 10)
Pack
£4.28

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There are only 440 of this item in stock.

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Code: 0675CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M6 x 75mm (Qty: 10)
Pack
£4.62

Limited Stock

There are only 520 of this item in stock.

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If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: 08110CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M8 x 110mm (Qty: 10)
Pack
£7.91

Limited Stock

There are only 540 of this item in stock.

or

If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.

Code: 08130CBI View
Exterior Silver Coach Bolts c/w Nuts and Washers - M8 x 130mm (Qty: 10)
Pack
£9.18

Limited Stock

There are only 550 of this item in stock.

or

If this is for a larger order, please contact us on 0161 794 1783 as we may be able to order this item for you.