100 PACK1/4-20 X 1/2 Hex Washer Head Flange Bolt Machine Screw GRADE 8 4037 ALLOY STEELHARDENED WE CARRY A FULL LINE OF METRIC AND STANDARD THREADED FASTENERS.HAVE ANYTHING YOU NEED, JUST MESSAGE USHAVE ANY COMMENTS OR QUESTIONS?For more fastener assortments and individual items please visit our eBay Store!Looking for another size or quantity? Please MESSAGE us and we will create a listing with what you need! VISIT OUR EBAY STORE TO VIEW ALL OF OUR PRODUCTS!