A-HD1NFSLNUT-AI NUT 1"-14 SLOTTED model-2541417 It fits the check chain

It fits the check chain assembly and is a direct replacement for OEM part number NCB660A and EC0N660A

1-3/4" 20 spline clutch rated at 22

SW72544-11

Prime Line 7-02615

Dim A (1) 5

A-HD1NFSLNUT-AI NUT 1"-14 SLOTTED model-2541417 It fits the check chainOne New Aftermarket Replacement 1" 14 Slotted Hex Nut for Agricultural and Construction Equipment This 1" 14 fine thread slotted hex nut (also known as a castellated nut) is a standard hardware fastener used across a wide range of agricultural, construction, and lawn and garden equipment. Slotted hex nuts feature opposed slots cut through the top of the nut, allowing a cotter pin to be inserted through a drilled bolt shank to lock the nut in place and