While I am not usually surprised at the threads on the Singer 4AD engine bolts & nuts( they are either BSF, Whitworth, or BA). I now have found that the rocker arm adjuster screw and nut are BSC (British Std Cycle). 5/16x26TPI. Anyone have a source for these???
Especially the adjuster screw. I have found the nuts.
BRG
4AD rocker arm adjuster screws & nuts
4AD rocker arm adjuster screws & nuts
NASOC Treasurer
NASOC 4AD Registrar
NASOC Parts Guy
Owner of a 1952 4AD, 1959 Singer Gazelle Estate, & 1959 Gazelle Convertible
NASOC 4AD Registrar
NASOC Parts Guy
Owner of a 1952 4AD, 1959 Singer Gazelle Estate, & 1959 Gazelle Convertible
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- Posts: 73
- Joined: Wed Jun 06, 2007 7:46 pm
- First Name: Steve
- Location: SW Iowa, USA
Re: 4AD rocker arm adjuster screws & nuts
I found they are the same as used on the 650 Triumph twin motorcycles, Unit construction, as used from the early 60's to mid 70's. The Triumph pieces typically either have a square top or allen key top and are somewhat longer than the singer pieces, but they are readily available from many sources, and not very expensive.
Steve W
Singer 4ADT
Singer 4ADT