SOHC Engine - Complete (Norton type) Cheesehead SS Bar-turned Screw Set

Complete cheesehead screw set for SOHC engine, in stainless steel with red fibre washers - comprising : 18 screws in total - 4 cambox front bevel screws, 6 rear cambox screws, 7 timing case screws, 1 crankcase screw and high quality fibre washer set (including obligatory spare washer!).

These cheesehead screws are CNC 'bar-turned' in Stainless Steel, to the same dimensions as the original 1930's/50's Norton items - i.e they are machined from solid bar, rather than being mass produced 'pressed thread' items. The primary reason for doing this is that the 'cheesehead' of Norton screws of this item has a distinctive shape and was slightly wider than the proprietary cheeseheads screws available today (many modern cheeseheads are approx 0.370-0.375" head diameter), while ours are larger as per the original Norton profile).

The set consists of 18 CNC manufactured stainless steel screws and 19 high quality red fibre washers (we always include an extra fibre washer - in case you lose one under the bench!).

An original NOS (New Old Stock) Norton cheesehead screw was used as a pattern (see final photograph), these screws copy that profile exactly.

Sorry, These are not cheap like some of the mass produced type available - as these screws are machined in-house and are a lengthy process and machined only in small batches.  Each screw has to go through a two stage machining process, with the second op having to be done manually for each screw (i.e. the 2nd op is to machine the head profile and mill the screwdriver slot. Hence a lengthy process to make.  Note, as in the last photograph - unlike many mass prroduced screws - we also use the correct 'Stop/Go' thread gauges to periodically check screws through the batch.

These screw sets prodcue the finishing touch to any SOHC Camshaft Norton engine, and I use them myself on all my own engine builds.

Update July 2025:  We have finally been able to finish machining a new batch of these - but as some have been pre-ordered, they may not stay in stock for too long.  FYI . . . since last in stock in 2022, the price of stainless steel and machine running costs have almost doubled - so although we have had to increse the cost of these sets since that last batch, it is only a small percentage of that uplift.