5/16 X 2 X 1/4-20 A574 Alloy Steel Socket Shoulder Bolt

Alloy Steel Socket Shoulder Bolt requires no material marking

Mechanical PropertiesAlloy Steel Socket Shoulder Bolt

Chemical PropertiesAlloy Steel Socket Shoulder Bolt

1. 1. One or more of the following alloying elements: chromium, nickel, molybdenum, or vanadium shall be present in sufficient quantity to ensure that the specified strength properties are met after oil quenching and tempering. As a guide for selecting material, an alloy steel should be capable of meeting the specified mechanical requirements if the “as oil quenched” core hardness one diameter from the point is equal to or exceeds 25 HRC + (55 × carbon content).

Dimensional SpecificationsAlloy Steel Socket Shoulder Bolt

1. 1. Shoulder. Shoulder refers to the enlarged unthreaded portion of the screw, the diameter of which serves as the basis for derivation of the nominal size.
2. 6. Neck and Fillet Under Head. Screws may be necked under the head at the option of the manufacturer. The fillet extension above D, at the intersection of the head bearing surface and neck or shoulder, shall be controlled by maximum dimension M and minimum radius of curvature R. (See Detail Y)
3. 7. Neck Under Shoulder. The neck under the shoulder shall allow the shoulder to seat against the face of a standard basic GO thread ring gage.
4. 8. Head Diameter. The head may be plain or knurled at the option of the manufacturer.
5. 10. Threads. Threads shall be Unified external thread: Class 3A, UNC Series. Acceptability is to be based on System 22, ASME B1.3M. Class 3A does not provide a plating allowance. When plated products are required, it is recommended that they be procured from the manufacturer.