PICTURES ARE REPRESENTATIVE OF ITEM, BUT ARE NOT OF THE ACTUAL ITEM. Product dimensions, finish, head markings, thread length, stamping shape or forging shape, etc., may differ from picture. Products are guaranteed to meet the specifications to which they are manufactured. Specifications allow for tolerances in dimension and shape, which can vary from lot to lot. These are heavy-duty, non-bottom bearing anchors of greater shear strength than other light and medium-duty expansion anchors. The design of the expansion clip assures full contact with the masonry. Wedge anchors withstand temperature fluctuations well. For best performance, minimum anchor spacing should be 10 hole diameters and minimum edge distance be 5 hole diameters. Carbon Steel: Anchor Body: AISI 1018 - 12L14 or equivalent free-machining. Expansion Wedge: AISI C1008 - 1010 or equivalent carbon steel. Nut: ASTM A-563 Grade-A carbon steel. Washer: Carbon steel. Type 304 Stainless: Anchor Body: Type 304Cu (1/4" thru 3/4" diameters). Type 304 (7/8 thru 1-1/4" diams & all lengths over 7"). Expansion Wedge: Type 304 stainless. Nut: 18-8 stainless. Washer: 18-8 stainless.