This SAE Part Standard covers selected inch screws, hex bolts, and nuts manufactured in accordance with SAE and American Society for Testing and Materials (ASTM) fastener standards. Appendix A covers bolt blanks to manufacture fitted bolts of specific materials. This document covers fastener materials often used in ship systems and equipment but its use may be applied wherever fasteners of the covered materials are used. This document permits the fasteners to be identified and ordered by a part or identifying number (PIN) as defined in this document.

Purpose

The purpose of this document is to assist the designer and other personnel by providing requirements and part identifying numbers for the most commonly used fasteners for ship systems and equipment. A part or identification number (PIN) is normally required for all military applications and provides a useful means of communicating fastener requirements to suppliers and manufacturers in a very succinct manner.

Fastener Part Numbers

This document provides part or identifying numbers that can be used to identify socket head cap screws, hex head cap screws, and bolts and hex nuts for the parts covered by this document. The parts covered by this document are to be manufactured in accordance with fastener standards issued by the SAE and ASTM. The part identification number (PIN) identifies material, material strength, coatings and special features, nominal diameter, thread configuration, fastener length, marking requirements, along with the applicable ASTM or SAE fastener specification.

Rationale

Three grades of Ni-Cr-Mo-W alloy (UNS N06686) are now covered. Ni-Cr-Mo-Cb (UNS N06625) is added for high temperature applications. Copper Alloy Brass 260 (UNS C26000) is added to provide a cold heading grade. Bolt blanks are added to reduce machining waste for shipbuilders and repair activities. Continuous threaded cap screws are added for energy absorption applications and also as an option where fit ups vary. SAE J429 and J995 Grade 2 steels are added to primarily support existing applications and are not recommended for new design. A note on galling is added to provide guidance when selecting aluminum, titanium, nickel alloys and austenitic CRES. CRES alloys updated to list those which are listed in referenced product standards. Designators have been added for pigmented overcoats for Zinc/Aluminum coatings.

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