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Screw-hwh

Screw-shoulder

Nut-lock, ni

Screw

Self Tapping Screw

Screw-hh

Nut-push

Screw-taptite

Lawn mower flywheel key (woodruff key). The flywheel key aligns the flywheel in the correct position on the crankshaft. If the engine stops suddenly due to hitting a hard object, the flywheel key shears in half to prevent damage to the engine. If the flywheel key is broken, the engine won't start.

Flywheel Key

Screw, hex flange

Screw-hh

Flat washer

Washer

Nut-impeller
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