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BBI - M16-2.00x325mm T=150 - Cup Head Bolt / Nut - Galv | 627303BBI - M16-2.00x325mm T=150 - Cup Head Bolt / Nut - Galv | 627303This BBI M16 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M16 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $17.82
- $17.82
- Unit price
- per
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BBI - M16-2.00x300mm T=150 - Cup Head Bolt / Nut - Galv | 627302BBI - M16-2.00x300mm T=150 - Cup Head Bolt / Nut - Galv | 627302This BBI M16 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M16 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $17.13
- $17.13
- Unit price
- per
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BBI - M12-1.75x200mm T=100 - Cup Head Bolt / Nut - Zinc | 626257BBI - M12-1.75x200mm T=100 - Cup Head Bolt / Nut - Zinc | 626257This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $6.09
- $6.09
- Unit price
- per
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BBI - M12-1.75x180mm T=100 - Cup Head Bolt / Nut - Zinc | 626254BBI - M12-1.75x180mm T=100 - Cup Head Bolt / Nut - Zinc | 626254This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $5.49
- $5.49
- Unit price
- per
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BBI - M12-1.75x150mm T=80 - Cup Head Bolt / Nut - Zinc | 626245BBI - M12-1.75x150mm T=80 - Cup Head Bolt / Nut - Zinc | 626245This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $4.83
- $4.83
- Unit price
- per
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BBI - M12-1.75x130mm T=80 - Cup Head Bolt / Nut - Zinc | 626239BBI - M12-1.75x130mm T=80 - Cup Head Bolt / Nut - Zinc | 626239This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $3.93
- $3.93
- Unit price
- per
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BBI - M12-1.75x120mm T=80 - Cup Head Bolt / Nut - Zinc | 626236BBI - M12-1.75x120mm T=80 - Cup Head Bolt / Nut - Zinc | 626236This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $3.74
- $3.74
- Unit price
- per
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BBI - M12-1.75x100mm T=60 - Cup Head Bolt / Nut - Zinc | 626230BBI - M12-1.75x100mm T=60 - Cup Head Bolt / Nut - Zinc | 626230This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $3.25
- $3.25
- Unit price
- per
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BBI - M12-1.75x90mm T=60 - Cup Head Bolt / Nut - Zinc | 626227BBI - M12-1.75x90mm T=60 - Cup Head Bolt / Nut - Zinc | 626227This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $3.35
- $3.35
- Unit price
- per
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BBI - M12-1.75x75mm T=60 - Cup Head Bolt / Nut - Zinc | 626221BBI - M12-1.75x75mm T=60 - Cup Head Bolt / Nut - Zinc | 626221This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $2.78
- $2.78
- Unit price
- per
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BBI - M12-1.75x70mm T=50 - Cup Head Bolt / Nut - Zinc | 626218BBI - M12-1.75x70mm T=50 - Cup Head Bolt / Nut - Zinc | 626218This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $2.18
- $2.18
- Unit price
- per
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BBI - M12-1.75x65mm T=50 - Cup Head Bolt / Nut - Zinc | 626215BBI - M12-1.75x65mm T=50 - Cup Head Bolt / Nut - Zinc | 626215This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $2.42
- $2.42
- Unit price
- per
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BBI - M12-1.75x60mm T=50 - Cup Head Bolt / Nut - Zinc | 626212BBI - M12-1.75x60mm T=50 - Cup Head Bolt / Nut - Zinc | 626212This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $2.87
- $2.87
- Unit price
- per
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BBI - M12-1.75x50mm T=40 - Cup Head Bolt / Nut - Zinc | 626209BBI - M12-1.75x50mm T=40 - Cup Head Bolt / Nut - Zinc | 626209This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $2.08
- $2.08
- Unit price
- per
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BBI - M12-1.75x45mm - Cup Head Bolt / Nut - Zinc | 626206BBI - M12-1.75x45mm - Cup Head Bolt / Nut - Zinc | 626206This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc...
- $2.48
- $2.48
- Unit price
- per
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BBI - M12-1.75x40mm - Cup Head Bolt / Nut - Zinc | 626203BBI - M12-1.75x40mm - Cup Head Bolt / Nut - Zinc | 626203This BBI M12 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M12 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc...
- $1.88
- $1.88
- Unit price
- per
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BBI - M10-1.50x200mm T=100 - Cup Head Bolt / Nut - Zinc | 626186BBI - M10-1.50x200mm T=100 - Cup Head Bolt / Nut - Zinc | 626186This BBI M10 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M10 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $3.71
- $3.71
- Unit price
- per
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BBI - M10-1.50x190mm T=100 - Cup Head Bolt / Nut - Zinc | 626183BBI - M10-1.50x190mm T=100 - Cup Head Bolt / Nut - Zinc | 626183This BBI M10 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M10 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $3.79
- $3.79
- Unit price
- per
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BBI - M10-1.50x180mm T=100 - Cup Head Bolt / Nut - Zinc | 626180BBI - M10-1.50x180mm T=100 - Cup Head Bolt / Nut - Zinc | 626180This BBI M10 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M10 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $3.75
- $3.75
- Unit price
- per
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BBI - M10-1.50x170mm T=100 - Cup Head Bolt / Nut - Zinc | 626177BBI - M10-1.50x170mm T=100 - Cup Head Bolt / Nut - Zinc | 626177This BBI M10 is a round cup head bolt with a square neck that locks against timber.► Key Features Size: M10 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish:...
- $3.68
- $3.68
- Unit price
- per
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Maxisafe - TIG Welding glove - Premium Goat Leather - 2XLarge | GWT165-12-01
Maxisafe - TIG Welding Glove - Premium Goat Leather - 2XLarge | GWT165-12-01 The Maxisafe TIG Welding Glove - Premium Goat Leather - 2XLarge (GWT165-12-01) is designed to provide the dexterity, comfort & protection required for precision TIG welding applications. Manufactured from premium full-grain...
- $19.91
$25.88- $19.91
- Unit price
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Maxisafe - TIG Welding glove - Premium Goat Leather - XLarge | GWT165-11-01
Maxisafe - TIG Welding Glove - Premium Goat Leather - XLarge | GWT165-11-01 The Maxisafe TIG Welding Glove - Premium Goat Leather - XLarge (GWT165-11-01) is a trade-quality welding gauntlet designed to provide dexterity, comfort & dependable hand protection during precision welding work. Manufactured...
- $19.91
$25.88- $19.91
- Unit price
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Maxisafe - TIG Welding glove - Premium Goat Leather - Large | GWT165-10-01
Maxisafe - TIG Welding Glove - Premium Goat Leather - Large | GWT165-10-01 The Maxisafe TIG Welding Glove - Premium Goat Leather - Large (GWT165-10-01) is a trade-quality welding gauntlet designed to provide dexterity, comfort & dependable hand protection during precision welding work. Manufactured...
- $19.91
$25.88- $19.91
- Unit price
- / per
Maxisafe - Leftwing Kevlar Stitched Welders glove | GWL164-01
Maxisafe - Leftwing Kevlar Stitched Welders Glove | GWL164-01 The Maxisafe Leftwing Kevlar Stitched Welders Glove (GWL164-01) is a left-hand welding gauntlet developed for welding, foundry work, steel fabrication & other high-heat applications. Manufactured from selected premium-grade split leather, it features a reinforced palm...
- $14.75
$19.18- $14.75
- Unit price
- / per
Maxisafe - Blue Flame Premium Kevlar Stitched Welders glove | GWB163-01
Maxisafe - Blue Flame Premium Kevlar Stitched Welders Glove | GWB163-01 The Maxisafe Blue Flame Premium Kevlar Stitched Welders Glove (GWB163-01) is a heavy-duty welding gauntlet designed for demanding welding, foundry & steel fabrication applications. Manufactured from premium-grade split leather, it features heat-resistant Kevlar...
- $14.75
$19.18- $14.75
- Unit price
- / per
Maxisafe - G-Force Chembarrier Glove, 30cm - 2XLarge | GNN203-11-01
Maxisafe - G-Force ChemBarrier Glove, 30cm - 2XLarge | GNN203-11-01 The Maxisafe G-Force ChemBarrier Glove, 30cm - 2XLarge (GNN203-11-01) is engineered to provide reliable chemical protection, excellent grip & outstanding dexterity for demanding industrial environments. Featuring a nitrile water-based & PU foam coating, this...
- $14.50
$18.85- $14.50
- Unit price
- / per
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► Cup Head Bolts
Cup Head Bolts – Smooth-Finish Fasteners for Timber & Structural Framing Cup head bolts, also known as carriage bolts, are used to fasten timber, steel, or composite materials where a smooth, tamper-resistant finish is required. These bolts feature a rounded dome head with a square neck underneath that locks into...
Cup Head Bolts – Smooth-Finish Fasteners for Timber & Structural Framing
Cup head bolts, also known as carriage bolts, are used to fasten timber, steel, or composite materials where a smooth, tamper-resistant finish is required. These bolts feature a rounded dome head with a square neck underneath that locks into the material when tightened. Ideal for timber decks, playgrounds, fencing, & structural framing, cup head bolts provide secure fastening without protruding edges.
What’s in This Collection:
► Galvanised cup head bolts for outdoor timber construction
► Stainless steel carriage bolts for corrosion resistance
► Smooth dome heads for safety & aesthetic appeal
► Square shank for anti-rotation in timber
► Supplied with nuts & washers for full fastening sets
► Sizes from M6 to M20 in various lengths
Sidebar
Clean, Safe Fastening for Outdoor & Timber Projects
Built for strength, safety, & clean finishes, our cup head bolts are a go-to choice for outdoor projects, structural joinery, & timber framing. Whether you're assembling a pergola or securing structural beams, these bolts hold strong—without the sharp edges.
► Rounded dome head for tamper resistance & safety
► Anti-spin square neck for easy installation
► Available in trade packs with washers & nuts
Frequently Asked Questions
The square neck embeds into the timber to prevent the bolt from turning while the nut is tightened—ensuring secure fastening without needing a second tool.
Yes—galvanised & stainless steel cup head bolts are corrosion-resistant, making them ideal for decks, fences, pergolas, & other outdoor structures.
They’re primarily designed for timber, but they can be used in thin metal sheeting where the square neck can bite in or where access is limited to one side.
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