This SAE Part Standard covers selected metric screws, hex bolts, and nuts manufactured in accordance with American Society for Testing and Materials (ASTM) and SAE fastener standards. 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 metric socket head cap screws, hex head cap screws, bolts and hex nuts for the parts covered by this document. The parts covered by this document are 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.

Relationship of J2295M to ISO Standards

There is no equivalent ISO standard. There are ISO standards that cover some similar products. The ASME dimensional standards referenced are similar to ISO standards and these standards usually contain a comparison to ISO dimensional standards. The metric fastener parts in J2295M are based on ASTM and ASME fastener standards. However, these parts are often not stocked and metric fasteners available from stock are often to DIN, ISO or other standards.

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