| Also known as | 1-40604, 14-604 |
| Diagram | Fig. 28 — FENDERS AND TAIL LAMP · ref 36 |
| Subsystem | primary |
| Listed in parts books | 1969–1972, 1974 |
BSA SCREW 1/4 X 1/2 UNF
A 1/4 x 1/2 inch UNF machine screw used across fender, tank, seat, and guard hardware.
This is a small UNF machine screw, 1/4 inch by 1/2 inch, that shows up all over the catalog wherever something needs a simple threaded fastener - fenders, tail lamp brackets, the battery carrier, gas tank and twinseat fittings, toolbox and silencer mounts, chainguards. It's a general-purpose hardware item rather than a part tied to one assembly, which is why you'll find it listed under so many different figures across the years.
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The part number also appears in the books as 1-40604 or 14-604, so if you're working from an older catalog and see one of those, it's the same screw. Given how often it turns up across fenders, seats, and guard hardware, it's worth keeping a few on hand rather than hunting one down mid-job.
We don't have more detail tying this specific screw to one exact mounting point on your bike - the catalog record shows it used in a lot of places. If you're not sure which one you need, bring in the old screw or the part it's holding and we'll match it up.
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