Aspen Fasteners AMMI006-51618X4-000200 0. 31 inch-18 x 4 inch B1821BH Hex Head Cap Screws & Military Bolts, Grade BD Alloy

Hex head cap screws and flat head slotted cap screws meet specific dimensional specifications and are often used in precise applications where tight tolerances are required The flat slotted head is preferred over the hex head when head clearance is a concern Hex Head Flat washer face bearing surface under the hex head that meet specific specifications as described by ASME B1821Features- 200 PieceSpecifications- Size 516''18 x 4''- Thread Size 516''18- Material Alloy Steel- Drive Style External Hex- Finish Yellow Zinc- Grade Grade BD- Head Style Hex Head- Thread Style Right Hand- Weight 186 lbs SKU: APFN6574