National Item Identification Number

01-390-4538
013904538
5365-01-390-4538
5365013904538

National Stock Number

Item Name

SPACER,STEPPED

Federal Supply Class

5365

Description

A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The length must exceed 25 percent of the outside diameter or distance across peripheral flats. (When the length, outside diameter, and/or distance across peripheral flats are designated as a tolerance, the maximum dimension will be used to determine compliance.) It must have one or more internal steps (counterbores) and/or external steps on either or both bearing surfaces. Excludes SPACER, OPTICAL ELEMENT. See also WASHER, RECESSED and WASHER, SHOULDERED AND RECESSED.

Commercial and Government Entity Code (Supplier Data)

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99643

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Reference Numbers (Part Numbers)

43906-1

Required Categories

MATERIAL
SURFACE TREATMENT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
OVER

Required Description

ALUMINUM ALLOY 208.0
ANODIZE
MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE
0.