A-B17091033YP-AI (C) KEY, SQUARE, 1/4XOne New Aftermarket Replacement Square Key (1 4") Fits Briggs and Stratton Engines This 1 4" square key is a shaft to hub locking component used in Fits Briggs and Stratton (B&S) small engines and outdoor power equipment. Square keys fit into matching keyways on shafts and hubs to prevent relative rotation between the two parts, maintaining proper alignment and secure power transfer during engine operation. This part is commonly used on crankshaft,
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