A-A-50553 Fitting For Conduit, Metal Thick-Wall Rigid And Thin-Wall Emt TypeThis commercial item description CID covers rain tight, concrete tight, and miscellaneous fittings for rigid metal conduit and electrical metal tubing. This document does not cover fittings designed to meet the requirements of the National Electrical Code for use in hazardous locations or cast metal outlet bodies and floor boxes.

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A-A-50553A

2.6 Material. The fitting material shall be as listed in table II (see 7.4(g)).

TABLE II. Fitting materials.

Material code	Material
A	Aluminum alloy
C	Cast iron
M	Malleable iron
N	Non-metallic
S	Steel
Z	Zinc alloy

3. SALIENT CHARACTERISTICS

3.1 Materials. Materials used shall be free from defects that would adversely affect the performance or maintainability of individual components or of the overall assembly. Fittings and component parts of the fittings shall be made of steel, malleable iron, cast iron, or non-ferrous metals as specified. Fittings made from die-cast zinc material shall conform to ASTM B 86, "Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings".

3.2 Electrical characteristics. The fittings shall conform to the requirements of Underwriters Laboratories (UL) standards for safety UL 467, "Grounding and Bonding Equipment", and UL 514B, "Fittings for Cable and Conduit", as applicable.

3.3 Electrical continuity. Fittings shall join with other parts of the raceway system in such a manner as to provide continuous electrical conductivity when tested for electrical continuity.

3.4 Grounding and bonding. Fittings and accessories shall conform to the requirements of UL 467, as applicable.

3.5 Interchangeability. All fittings of the same classification shall be identical to the extent necessary to insure interchangeability of component parts, assemblies, accessories, and spare parts.

4. REGULATORY REQUIREMENTS

4.1 Recovered materials. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR).

4.2 Metric products. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units provided they fall within the specified tolerances using conversion tables contained in FED-STD-376, "Preferred Metric Units for General Use by the Federal Government", and all other requirements of this CID including form, fit, and function are met.