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Carriage Bolts & Hex Nuts M10 x 150mm (Bag of 2)
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Cup Square Carriage Bolts & Hex Nuts M10 x 150mm (Bag of 2)
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Delivery Information
| Delivery Time Frame | Delivery Information |
| Next Working Day By 1PM | When an order is placed by 3pm for next working day on certain items |
| Standard Delivery | Usually delivered in 2 to 4 working days |
| Delivery Charges | |
| UK Mainland | Prices start at £3.95 for very small items, £6.50 for small, £9.50 for medium and £20 for large/long items |
| Scottish Highlands & Islands, Northern Ireland & Ireland | Prices from £30, please see our delivery page for more info. |
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£2.16
Incl. VAT
£1.80
Excl. VAT
Incl. VAT
Excl. VAT
Incl. VAT
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Description
Reliable Structural Fastening with Carriage Bolts and Hex Nuts
Securing substantial pieces of timber requires fixings that deliver deep structural integrity and neat aesthetic presentation. Standard threaded rods or exposed hexagonal head bolts often present practical hurdles on finished carpentry projects. Sharp bolt heads can snag on clothing, disrupt the flow of outdoor ironmongery, or prove frustrating to hold with a spanner when you work single-handed. The Carriage Bolts & Hex Nuts M10 x 150mm (Bag of 2) eliminate these common assembly frustrations by providing an intelligent, self-anchoring design tailored specifically for demanding wood-to-wood and ironmongery installations.
Known widely throughout the building trade as cup square hex bolts, these fasteners rely on a smooth domed head supported directly underneath by an integrated square shoulder. When drawn tight into a pre-drilled timber borehole, this square collar embeds securely into the surrounding grain. The collar stops the bolt from rotating while you tighten the matching hexagonal nut from the opposite side. This mechanical grip streamlines your installation workflow, saving effort across garden fencing projects, heavy-duty wooden gate builds, pergola framing, and external joinery tasks.
With a generous 150mm shaft length and a robust M10 metric profile, this twin pack delivers substantial clamping authority across deep timber baulks and chunky structural posts. Each bolt is treated with a protective zinc plating that delivers everyday rust resistance, giving your exterior and interior carpentry the reliable performance you expect from Doorfit trade hardware.
Step-by-Step Installation and Performance Pipeline
1. Clean Hole Preparation
Accurate preparation ensures your fixings seat flat and hold firm. Drill a clean, straight 10mm clearance hole through your combined timber members or metal brackets. The B Point tip on these bolts glides cleanly into pre-drilled openings without binding, preventing damage to the thread lead-in.
2. Square Collar Seating
Push the fastener through the bore and tap the rounded cup head lightly with a wooden or rubber mallet. This seats the square under-head shoulder firmly into the timber grain. Once seated, the shoulder locks the bolt shaft securely in position, preventing annoying spin during final assembly.
3. Single-Tool Fastening
Because the anti-spin collar anchors the head into the wood, you only need one spanner or socket to complete the job. Thread the supplied M10 nut over the 150mm shank and tighten it down smoothly using a standard 17mm across flats spanner, creating powerful compression across the joint.
4. Smooth Tamper Resistance
The external domed head leaves a neat, snag-free exterior surface with zero external drive points. This prevents opportunistic tampering on garden gates and secure boundary fencing while shielding passers-by from harsh edges or exposed bolt threads.
Key Structural Applications and Everyday Benefits
The Carriage Bolts & Hex Nuts M10 x 150mm (Bag of 2) are engineered to meet the needs of tradespeople, fence contractors, and domestic woodworkers. The long 150mm reach provides ample thread engagement when uniting thick timber components or heavy ironmongery.
- Timber to Timber Clamping Perfect for securing large posts to rails, lap joints on carports, timber decking substructures, garden pergolas, and heavy retaining framework.
- Heavy Ironmongery Attachment Ideal for mounting substantial gate hinges, hook and band hinges, security drop bolts, and steel reinforcement plates directly to wood.
- Corrosion Resistant Finish The bright zinc plating protects against moisture exposure, prolonging the working life of garden joinery without early surface corrosion.
- One-Person Assembly The self-holding square collar allows simple fastening when working solo at the top of a ladder or in awkward spaces where two spanners cannot reach.
- Smooth Architectural Appearance The smooth domed profile gives exterior garden furniture and entry gates a professional, craftsman-built finish.
Detailed Specifications
| Specification | Rating or Standard | Practical Details |
|---|---|---|
| Thread Diameter | Metric M10 | Requires a 10mm clearance hole for timber installations |
| Overall Shaft Length | 150mm | Supplies ample clamping depth for thick structural woodwork |
| Head Geometry | Domed Cup Head | Smooth, snag-free exterior surface with no external drive slot |
| Collar Type | Square Anti-Spin Shoulder | Locks into wood to prevent bolt rotation while tightening |
| Fastener Point | B Point Chamfered | Designed for insertion into pre-drilled through holes |
| Included Hex Nut | M10 Standard Thread | Matches shaft pitch for secure, heavy clamping loads |
| Across Flats Nut Size | 17mm A/F | Tightened using standard UK 17mm open spanners or sockets |
| Surface Coating | Bright Zinc Plated (BZP) | Corrosion protection suitable for general indoor and outdoor use |
| Pack Quantity | 2 Pieces | Supplied in a sealed bag with 2 bolts and 2 matching hex nuts |
Not sure if this fixing is right for your requirements?
Choosing the right fastener length and gauge is vital for long-term structural security. If you need advice on timber fixings or architectural ironmongery, our experienced team is here to assist you.
Contact Our TeamSpecification
| Finish | Zinc |
|---|