Buy Cup Head Bolts Nuts Online in Australia
Cup head bolts, also sold as carriage or coach bolts, have a domed head and a square neck that grips the material so the bolt does not turn when the nut is tightened. This range has 11 active listings: Hobson (8), Inox World (2) and Bremick (1), in metric, UNC and BSW threads and zinc, galvanised, plain and 316 stainless finishes.
What's in the range
| Type | Listings | What's there |
|---|---|---|
| Hobson metric cup head bolts and nuts | 7 | Grade 4.6 mild steel in zinc and galvanised, class 4.6 in plain, zinc plated and hot dip galvanised, class 8.8 hot dip galvanised and class 10.9 zinc plated. |
| Imperial thread cup head bolts | 2 | Hobson UNC cup head bolt and nut, grade 8 zinc plated, and Bremick BSW cup head bolt and nut, grade 2 mild steel zinc. |
| Stainless steel cup head bolts | 2 | Inox World square neck cup head bolts in 316 stainless steel, including an M8 listing. |
Choosing a cup head bolt
Match the thread form and size to the nut and the hole, and choose the strength class and finish for the job: zinc for dry conditions, hot dip galvanised for outdoor work and 316 stainless steel where corrosion resistance matters. Check that the bolt length covers the material thickness plus the nut. Always check the data sheet for sizes, strength class and any standard the bolt is made to before you order, and for structural applications confirm with the engineer.
Related ranges
Bolts | Hex Bolts | Hex Bolts & Nuts | Purlin Bolts Nuts | Plow Bolts | Nuts | Stainless Fasteners
Order from AIMS Industrial
AIMS Industrial has supplied Australian industry since 1988. Call us on (02) 9773 0122, contact the team or request a quote and we'll help match the right bolt to your thread, strength class and finish.
Cup Head Bolt FAQs
What is a cup head bolt?
It is a bolt with a domed (cup) head and a square section under the head. The square neck seats in the material, usually timber or a punched steel plate, and stops the bolt turning while you tighten the nut.
Is a cup head bolt the same as a coach bolt or carriage bolt?
In general use the names describe the same style of bolt. Check the listing for the thread form and strength class, since these can differ between suppliers.
Which finish should I choose?
Zinc plated suits dry indoor conditions, hot dip galvanised suits outdoor work, and 316 stainless steel suits corrosive or marine conditions. The listing states the finish for each bolt.