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Part Number

Part Number:
NSN:
NIIN:
Item Name:
WASHER , FLAT

Definition:

A WASHER HAVING A CENTRALLY LOCATED HOLE WITH A SOLID OR LAMINATED CROSS-SECTION AND TWO FLAT PARALLEL BEARING SURFACES. THE HOLE MUST BE 75 PERCENT OR LESS THAN THE LARGEST DIMENSION AND THE BEARING SURFACE FINISH IS GREATER THAN 32 MICROINCH (0.8 MICROMETER). THE THICKNESS CANNOT EXCEED 25 PERCENT OF THE LARGEST OUTSIDE DIMENSION. WHEN THE LARGEST OUTSIDE DIMENSION IS LESS THAN 1/4 INCH OR 6MM, THE THICKNESS MUST BE 0.006 INCHES (0.15MM) OR GREATER AND FOR ITEMS 1/4 INCH (6MM) OR LARGER, THE THICKNESS MUST BE 0.016 INCHES (0.4MM) OR GREATER. THE MAXIMUM TOLERANCE IS APPLIED TO DIMENSIONS AND USED AS A DETERMINING FACTOR. ITEMS WITH SEPARABLE LAMINATION USE SHIM. FOR ITEMS FABRICATED FROM CERAMIC OR ELECTRICALLY RATED MATERIALS BY SPECIFICATION OR INDUSTRY STANDARDS USE INSULATOR (1), WASHER. EXCLUDES DISK, VALVE, GRAPHITE IMPREGNATED AND LUBRICATED ITEMS.

CAGE Information

Code Company
88044 AERONAUTICAL STANDARDS GROUP DEPT OF

Federal Supply Class

Title

NUTS AND WASHERS

Inclusions:

INCLUDES LOCKNUTS; EYE NUTS; PLAIN NUTS; CASTELLATED NUTS; WING NUTS; PLATE NUTS; PUSH ON NUTS; CONCAVE AND CONVEX WASHERS; FLAT WASHERS; KEYED WASHERS; LOCK WASHERS; SHOULDERED WASHERS; SPLIT WASHERS.

Exclusions:

EXCLUDES BEARING THRUST WASHERS (FSC 3120); SHIMS (FSC 5365); RING SPACERS (FSC 5365); PLATE SPACERS (FSC 5365); LOCK RINGS (FSC 5365).

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AAUB HOLE DIAMETER 1.005 INCHES MINIMUM AND 1.025 INCHES MAXIMUM
AAUB HOLE DIAMETER 1.005 INCHES MINIMUM AND 1.025 INCHES MAXIMUM
ABNM THICKNESS 0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM
ZZZT NONDEFINITIVE SPEC/STD DATA 2 GRADE AND A TYPE AND B CLASS
FEAT SPECIAL FEATURES LIGHT
AAGR CROSS-SECTIONAL SHAPE STYLE RECTANGULAR
ABMX CENTER HOLE SHAPE STYLE ROUND
MDCL MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-6721 MIL SPEC 3RD MATERIAL RESPONSE OVERALL AND MIL-S-6721 MIL SPEC 2ND MATERIAL RESPONSE OVERALL AND MIL-S-5059 MIL SPEC 1ST MATERIAL RESPONSE OVERALL AND MIL-S-6721 MIL SPEC 4TH MATERIAL RESPONSE OVERALL
ABMW PERIPHERAL SHAPE STYLE ROUND
ADAV OVERALL DIAMETER 1.745 INCHES MINIMUM AND 1.770 INCHES MAXIMUM
MATT MATERIAL STEEL COMP 347 OVERALL OR STEEL CORROSION RESISTING OVERALL OR STEEL COMP 321 OVERALL OR STEEL COMP 348 OVERALL
SFTT SURFACE TREATMENT PASSIVATE OVERALL

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