1.1.1 This Standard covers complete general anddimensional data for various types of hexagon andspline (fluted) socket cap screws, shoulder screws, setscrews, and hexagon and spline keys recognized as anAmerican National Standard. Also, included are appendicesthat provide specifications for hexagon and splinesocket gages and gaging, tables showing applicabilityof keys and bits to various socket screws types and sizes,drill and counterbore sizes for socket head cap screws,and formulas on which dimensional data are based.However, where questions arise concerning acceptanceof product, the dimensions in the tables shall governover recalculation by formula.1.1.2 The inclusion of dimensional data in this Standardis not intended to imply that all of the productsdescribed are stock production sizes. Consumers shouldconsult with manufacturers concerning lists of stock productionsizes.
ASME B18.3-2003 history
1970ASME B18.3-2012 Hexagonal keyed and splined cylindrical head hexagonal shouldered set screws (Imperial series)
0000 ASME B18.3-2003(R2008)
2003ASME B18.3-2003 Socket Cap, Shoulder, and Set Screws, Hex and Spline Keys (Inch Series) Date of Issuance: 4/29/2005
1998ASME B18.3-1998 Socket cap, shoulder, and set screws, hex and spline keys (Inch series)
1986ASME B18.3-1986 Socket cap, shoulder, and set screws (Inch series)