DROP-IN® anchors are internally threaded

split drive anchors

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1/4 x 1 1/2 Round Split Drive Anchor Zinc Plated (100)

2 1/4 F436 Flat Washer Plain 3/4-10 Grade 5 Hex Cap Screws Zinc Plated DROP-IN® anchors are internally threaded2 1 4 F436 Flat Washer Plain . F436 flat washers are manufactured from carbon steel to meet or exceed ASTM F436. Zinc plated material will meet or exceed ASTM F1941. Hot Dip Galvanized material will meet or exceed ASTM A153 and or ASTM F2329. Hardness for plain and zinc plated washers is HRC 38 45 and HRC 26 45 for hot dip galvanized washers per ASTM F436.