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,