https://www.mcmaster.com/products/nuts/nut-type~locknut/thread-size~2-548-18-1/
2.548"-18 Locknuts | McMaster-Carr
Choose from our selection of 2.548"-18 locknuts in a wide range of styles and sizes. Same and Next Day Delivery.
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https://www.mcmaster.com/products/fasteners/thread-size~2-548-18-1/
2.548"-18 Fasteners | McMaster-Carr
Choose from our selection of 2.548"-18 fasteners in a wide range of styles and sizes. Same and Next Day Delivery.
2 54818fastenersmcmastercarr