Time Away

We will be closing for Two week in Mid May Our last trading day will be Friday 8th May 2026.
Any orders placed after this date will be processed when we reopen on
Monday, 25
th May.


Upgrade your classic motorcycle with our high-quality stainless steel bolt, designed as a direct replacement for the original. Manufactured from solid stainless steel, this bolt offers superior durability and a sleek appearance.


Key Features:

Part Number: 15-2018

Material: Stainless steel

Length: 1' 7/8" under head (47.625mm)

Thread: 5/16" x 26 TPI (BSCY / CEI)

Spanner Size: 5/16 BSF - 1/4" Whitworth - 13.34mm AF

Unlike most alternatives on the market, our bolt features a beautifully domed head. When polished, it adds an elegant touch to your motorcycle’s aesthetics. (See photos for details.)


Versatile Application: This bolt is designed to fit various parts across multiple BSA and Triumph models, including:

  • Oil tank to frame bolt
  • Head steady bolt
  • Saddle seat to frame bolt
  • Crankcase bolt

Produced in Cornwall, England by CPC Engineering using precise CNC manufacturing techniques, ensuring consistent quality and performance.


Pricing: Price is per bolt.

15-2018 - 5/16" BSCY Bolt - 1' 7/8" Under-Head

  • £7.20

  • Ex Tax: £6.00

  • 10 or more £6.12
  • 25 or more £5.40
  • 50 or more £4.32
  • 100 or more £3.60

Tags: BSA, Triumph, 15-2018, stainless, bolt, 5/16, UH, under, head, 1, 7/8,