Bulk SAE Flat Washers – Medium Carbon Thru-Hardened, Plain Finish, Made in USA – Monster Bolts Size:5000 Qty - 3/8" vibration-resistant internal threads—no tapping

vibration-resistant internal threads—no tapping

Speed assembly and banish rust with 1/4-20 Unslotted Indented Hex Washer Head Thread-Cutting Screws

These heavy-duty fasteners are manufactured from ASTM A574 Alloy Steel and finished with a thermal black oxide + oil coating for mild corrosion protection and a clean

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Bulk SAE Flat Washers – Medium Carbon Thru-Hardened, Plain Finish, Made in USA – Monster Bolts Size:5000 Qty - 3/8" vibration-resistant internal threads—no tappingMonster Overview Fix your project right the first time with SAE Flat Washers Medium Carbon Thru Hardened, Plain Finish from Monster Bolts. These USA made SAE pattern washers feature a smaller outside diameter than USS washers and are ideal for machinery, automotive, equipment assembly, fabrication, and industrial applications. Manufactured from medium carbon thru hardened steel, these washers deliver a durable, consistent bearing surface under bolt