Part Number
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 |
|---|---|
| 78286 | SIKORSKY AIRCRAFT CORPORATION |
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 |
|---|---|---|
| MATT | MATERIAL | STEEL COMP 4340 OVERALL |
| MATT | MATERIAL | STEEL COMP 4340 OVERALL |
| AAGR | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR |
| ABMX | CENTER HOLE SHAPE STYLE | ROUND |
| ADAV | OVERALL DIAMETER | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000,COND C MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| AAUB | HOLE DIAMETER | 0.505 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| ABMW | PERIPHERAL SHAPE STYLE | ROUND |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-S-365,TYPE 1,GRADE A FED SPEC SINGLE TREATMENT RESPONSE OVERALL OR SS8488,FSCM 78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| CQBC | MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |
| SFTT | SURFACE TREATMENT | SILVER OVERALL OR NICKEL OVERALL |
| ABNM | THICKNESS | 0.177 INCHES MINIMUM AND 0.180 INCHES MAXIMUM |