Custom Fasteners Ltd.

Bolts, Nuts, Washers & Screws

T.P.I. stands for "Threads per Inch". AF stands for "across flats".

Bolt and screw lengths are measured under the head and the diameter is measured across the shank. Shorter lengths are usually supplied threaded all the way up, whilst longer lengths have part thread and part plain shank. 

Hexagon bolts (excluding zinc and assortments) have the top face mirror polished to remove marks and lettering.

Where normal stock levels are currently held, the "Add to Cart" button means that item is in stock and can be ordered. Where stock levels are low or only a limited number is available, the quantity in stock is normally shown.

All our prices include 20% VAT

This section last updated: 19/11/15

All Thread Studding

All Thread StuddingAll thread studs are threaded for their entire length and are ideal for cutting up as required. Supplied in 12" (300mm) lengths, they are available in Metric, BSCY (Cycle), BSF, Whitworth, UNF and UNC. Supplied in stainless steel although we still have some sizes available in zinc plated mild steel as listed.

Allen Screw Kits

Allen Screw KitsCustom Fasteners Allen Screw Kits are available in chrome or stainless steel. Each kit contains replacement screws for the engine and gearbox outer side covers and come complete with appropriate keys.

Allen Screws (Socket Head Screws)

Allen Screws (Socket Head Screws)Available in chrome and stainless steel. This section includes Socket Head Cap Screws ("Allen Screws"), Countersunk Socket Screws, Button Head Socket Screws and Flange Button Head Socket Screws.


AssortmentsThis section includes our various assortment packs and boxed assortments of nuts, bolts, washers and socket cap screws.


BoltsMetric, Metric Fine, UNF, UNC, Cycle, BSF, 2BA and Whitworth threads available in chrome and stainless steel. All individual bolts feature polished heads.

Bright Round Bar

Bright Round BarAvailable in imperial sizes only, this blank bright round bar comes supplied in 12" lengths and is ideal for making up your own studs. Supplied in free machining 303 grade stainless steel.