| Also known as | S1929 |
| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 39 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1970 |
SCREW 1/4 UNC C/SHAFT RET
1/4 UNC retaining screw for the crankshaft assembly, also cross-referenced to a cam retaining plate.
This is the 1/4 UNC screw that retains the crankshaft component in the engine's crankshaft and connecting rod assembly, listed in the parts book under 21-1929 (also shown as S1929 in older catalog references). It shows up in the CRANKSHAFT AND CONNECTING RODS figure, which places it right in the bottom end of the motor.
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The catalog description reads C/SHAFT RET, meaning it holds a retaining part in place on the crankshaft assembly. Some catalog listings tie this same screw to a cam retaining plate application, so it may do double duty depending on which parts book you're cross-referencing.
Our catalog appearances put it in the 1969–1970 window, so if you're working on an engine from around there, this is worth checking against your original hardware before you order.
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