Coach Bolts





Often called carriage bolts or cup square hex bolts, coach bolts have a domed head with a square underside. Our range of coach bolts that are zinc plated come with a hex nut. For stainless steel coach bolts, you must order the nuts separately.
Carriage bolts are available in a range of sizes with metric coarse threads. They are most commonly used in the construction and timber trades.
Coach bolts are often confused with coach screws, which are actually hexagon-headed woodscrews. Coach bolts are commonly crafted from mild steel in strength grades 4.6 or 4.8. Our stock of BZP bolts is usually marked with the manufacturer's identification and the strength grade on the head.
What Are Coach Bolts Used For?
Coach bolts are most commonly used for joining different materials together such as metal to wood. They are often seen as a heavy-duty fastener as they can be used at crucial structural joins. However, that is not to say that they can't be used for a wide variety of DIY applications. Their large domed head helps to provide a secure fixing.
The name "carriage bolt" dates back to when horse-drawn carriages were used. These bolts were used to fix metal straps to wooden parts. The square head held the bolt tight as the nut was tightened.
Please note: All coach bolts up to 100mm length are fully threaded. For those over 100mm, thread length can vary depending on the manufacturer, so some products may not be fully threaded. Please feel free to check with us before placing your order to confirm thread length.
CODE: CSHMCGV12075
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.6 |
Diameter: | M12 |
Material: | Steel |
Finish: | Galvanised Steel |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 75mm |
CODE: CSHMCGV12100
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.6 |
Diameter: | M12 |
Material: | Steel |
Finish: | Galvanised Steel |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 100mm |
CODE: CSHMCGV12130
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.6 |
Diameter: | M12 |
Material: | Steel |
Finish: | Galvanised Steel |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 130mm |
CODE: CSHMCSC12090
Pitch: | 1.75P |
Grade: | Grade 4.6 |
Diameter: | M12 |
Material: | Steel |
Finish: | Self Colour |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 90mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCSC12130
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.6 |
Diameter: | M12 |
Material: | Steel |
Finish: | Self Colour |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 130mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12025
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 25mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1202550
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 25mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12030
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 30mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12050
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 50mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1205050
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 50mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12060
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 60mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12070
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 70mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12075
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 75mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12080
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 80mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12090
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 90mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12100
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 100mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12110
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 110mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12120
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 120mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12130
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 130mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12140
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 140mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1214020
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 140mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP12150
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 150mm |
Tapping Drill Size: | 10.2mm |
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 180mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1218020
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 180mm |
Tapping Drill Size: | 10.2mm |
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 200mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1220020
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 200mm |
Tapping Drill Size: | 10.2mm |
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 220mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1222020
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 220mm |
Tapping Drill Size: | 10.2mm |
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 240mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1224015
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 240mm |
Tapping Drill Size: | 10.2mm |
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 260mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1226015
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 260mm |
Tapping Drill Size: | 10.2mm |
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 280mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1228015
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 280mm |
Tapping Drill Size: | 10.2mm |
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 300mm |
Tapping Drill Size: | 10.2mm |
CODE: CSHMCZP1230015
Pitch: | 1.75P |
Threads Per Inch: | 14.5 |
Grade: | Grade 4.8 |
Diameter: | M12 |
Material: | Steel |
Finish: | Bright Zinc Plated and Clear Passivation |
Head Type: | Cup Square |
Thread Type: | Metric Coarse |
Length Under Head: | 300mm |
Tapping Drill Size: | 10.2mm |
- Category
- Pack Size
- Finish
- Length Under Head
- Tapping Drill Size
- Grade
- Threads Per Inch