Part Number
Definition:
A CIRCULAR-SHAPED ITEM DESIGNED TO MAINTAIN PREDETERMINED DISTANCE BETWEEN ASSEMBLED PARTS AND/OR FOR DISTRIBUTING PRESSURE OR PREVENTING ENDWISE MOVEMENT BETWEEN MEMBER PARTS. IT HAS A SOLID CROSS-SECTION AND TWO FLAT PARALLEL BEARING SURFACES. THE DISTANCE BETWEEN THE BEARING SURFACES PERPENDICULAR TO THE AXIS OF THE CENTRALLY LOCATED HOLE SHALL NOT EXCEED 25 PERCENT OF THE OUTSIDE DIAMETER. THE DIAMETER OF THE CENTRALLY LOCATED HOLE MUST EXCEED 75 PERCENT OF THE OUTSIDE DIAMETER. EXCLUDES LAMINATED ITEMS. FOR ITEMS MANUFACTURED FROM IMPREGNATED GRAPHITE OR LUBRICATED NONMETALLIC MATERIALS, EXCLUDING FELT OR PLASTICS, SEE GASKET. FOR ITEMS MANUFACTURED FROM LUBRICATED PLASTICS, SEE BEARING, WASHER, THRUST. FOR ITEMS MANUFACTURED FROM LUBRICATED FELT, SEE FELT, MECHANICAL, PREFORMED. EXCLUDES DISK, VALVE; INSULATOR WASHER; AND SHIM. SEE ALSO SPACER, PLATE AND SPACER, SLEEVE.
CAGE Information
| Code | Company |
|---|---|
| 78286 | SIKORSKY AIRCRAFT CORPORATION |
Federal Supply Class
Title
BUSHINGS, RINGS, SHIMS, AND SPAC
Inclusions:
INCLUDES EXTERNALLY THREADED RINGS; KEYED AND SERRATED LOCK RINGS; DEE RINGS; INSTRUMENT RETAINING RINGS; SHIM SETS AND ASSORTMENTS; PLATE SPACERS; RING SPACERS; SLEEVE SPACERS; STEPPED SPACERS; SPACER SETS AND ASSORTMENTS; SLEEVE BUSHINGS; MACHINE THREADED BUSHINGS; MACHINE THREADED PLUGS.
Exclusions:
EXCLUDES SLEEVE BEARINGS (FSC 3120); PIPE THREADED PLUGS (FSC 4730); PISTON RINGS (FSC 2520, 2805, 2810, 2815, 2825, 2990, 3040, 4310, AND 4820); RETAINING RINGS (FSC 5325); SHIM STOCK (FSC 9515).
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| CSYM | SURFACE FINISH | 125.0 MICROINCHES LEFT SIDE |
| ABHE | OUTSIDE DIAMETER | 8.040 INCHES MINIMUM AND 8.060 INCHES MAXIMUM |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE |
| SFTT | SURFACE TREATMENT | OXIDE |
| CSYM | SURFACE FINISH | 125.0 MICROINCHES BORE |
| CQFM | HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| AARX | INSIDE DIAMETER | 7.765 INCHES MINIMUM AND 7.770 INCHES MAXIMUM |
| CSYM | SURFACE FINISH | 125.0 MICROINCHES LARGEST OUTSIDE DIAMETER |
| ADUM | OVERALL THICKNESS | 0.040 INCHES MINIMUM AND 0.060 INCHES MAXIMUM |
| CSYM | SURFACE FINISH | 125.0 MICROINCHES RIGHT SIDE |
| MATT | MATERIAL | STEEL COMP 4130 |