Pattern Mk1 Ultra 150 Spring / Bolt Spring To Suit Henderson

Henderson Mk1 Ultra 150 garage door spring
Henderson Mk1 Ultra 150 garage door spring
Henderson Mk1 Ultra 150 garage door spring

Pattern Mk1 Ultra 150 Spring / Bolt Spring To Suit Henderson

  • Description

Description

A spring to suit many older doors fitted with early Henderson Ultra gear, found mainly on custom-built door panels. These springs are easily identified either by size or by the adjuster bolt, which has a hexagonal head as opposed to a hook.

The spring has 82 coils with a length over coils of 520mm (20 1/2″) and an outside diameter of 48mm (1 7/8″).