Heavy Slotted Nut Size Data Chart Per. ASME 18.2.2

Notes on Heavy Slotted Nut Size Data Chart Per. ASME 18.2.2.

True Position of Tapped Hole. The axis of tapped hole shall be located at true position with respect to the axis of nut body within a tolerance zone having a diameter equivalent to 4% of the maximum width across flats, regardless of feature size.
Countersink. Tapped hole shall be countersunk on the bearing face. The maximum countersink diameter shall be the thread basic (nominal) major diameter plus 0.030 in. for 3/8 in. nominal size nuts and smaller, and 1 .O8 times the basic major diameter for nuts larger than 3/8 in. No part of the threaded portion shall project beyond the bearing surface.
Threads. Threads shall be unified coarse, fine, or 8 thread series (UNC, UNF or 8 UN series), Class 2B.
Material. Unless otherwise specified, chemical and mechanical properties of steel nuts shall conform with Grade A of ASTM A 563, Carbon and Alloy Steel Nuts; or Grade 2 of SAE J995, Mechanical and Material Requirements for Steel Nuts. Nuts of other materials such as corrosion resistant (stainless) steel, brass, bronze, and alumi- num alloys shall have properties as agreed upon between the manufacturer and pur- chaser. The properties for nuts of several grades of corrosion resistant steel alloys are covered in ASTM F 594, and of several nonferrous materials in ASTM F 467.