Details
| Diagram | Fig. 4 — MANIFOLD AND TAPPETS · ref 20 |
| Subsystem | engine top |
| Listed in parts books | 1974 |
PLUG 5/16 UNC X3/8UH
A 5/16 UNC threaded sealing plug used in the manifold and tappets area of the engine top end.
PN · 21-1903
This is a small threaded plug, 5/16 UNC thread by 3/8 under-head, listed in the manifold and tappets section of the parts book for 1974. Parts like this are used to seal off an unused passage or bolt hole in the top-end castings so oil or air doesn't escape where it shouldn't.
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Our catalog record on this one is brief, just the single listing tied to that manifold and tappets figure. If you're chasing one down for a specific engine, bring the old one or the casting in question so we can match it up before you buy.
$2.95
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