| Also known as | 99-3557 |
| Diagram | Fig. 13 — FRAME · ref 46 |
| Subsystem | frame |
| Listed in parts books | 1960–1962, 1964–1966 |
NUT PU TRI FTRST 1/2X20
A 1/2 inch x 20 thread footrest mounting nut for pre-unit Triumph twins, later renumbered 99-3557.
DS48 is a footrest nut for pre-unit Triumph twins, thread size 1/2 inch x 20 as called out in the catalog. It shows up in the FRAME and ENGINE UNIT FITTINGS AND FOOTRESTS sections, which places it right where the footrest mounting bolt passes through the frame plate or bracket. This part was later renumbered to 99-3557, so if you're working from a later parts book or ordering from more recent stock, that's the number you'll see.
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Catalog appearances for DS48 run from the mid-1960s, consistent with pre-unit era Triumph twins. If you're rebuilding a footrest assembly, it's worth having a couple of these on hand since they're small parts that walk off easily during a strip-down.
Call the shop if you're not sure whether your bike's footrest hardware matches this nut - we can confirm before you order.
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