Part Number
Definition:
A NUT, CIRCULAR IN SHAPE, WHICH MAY HAVE WRENCHING FACILITIES SUCH AS FLATS, HOLES, PROTRUSIONS, SLOTS OR SPLINES IN OR ON THE PERIPHERY OR IN THE FACE OPPOSITE THE BEARING SURFACE. FOR ITEMS HAVING A THICKNESS (OR HEIGHT) EXCEEDING TWO TIMES THE OUTSIDE DIAMETER, USE POST, ELECTRICAL-MECHANICAL EQUIPMENT. SEE ALSO NUT (1), PLAIN, KNURLED. (WHEN HEIGHT OR THICKNESS AND/OR OUTSIDE DIAMETER IS DESIGNATED AS A TOLERANCE DIMENSION, THE MAXIMUM DIMENSION WILL BE USED TO DETERMINE COMPLIANCE.)
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 4130 OVERALL |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL |
| ABKU | FLANGE THICKNESS | 0.237 INCHES NOMINAL |
| ACTD | NUT DIAMETER | 3.656 INCHES NOMINAL |
| AGGP | DRILLED HOLE DIAMETER | 0.125 INCHES NOMINAL |
| CRSQ | COUNTERSINK ANGLE | 90.0 DEGREES NOMINAL BOTH ENDS |
| CRHC | HOLE CONFIGURATION STYLE | CONFIGURATION F |
| ADBG | NUT THICKNESS | 0.405 INCHES NOMINAL |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| ALET | HOLE TYPE AND QUANTITY | 8 DRILLED |
| ADBM | DRIVE POINT QUANTITY | 8 |
| CQFM | HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| ADBJ | UNDERCUT THICKNESS | 0.070 NOMINAL MILS AND 0.080 NOMINAL CENTIMETERS |
| CQJX | NOMINAL THREAD SIZE | 3.125 INCHES |
| ACTA | NUT STYLE | ROUND |
| ADBH | DRIVE POINT WIDTH | 0.375 NOMINAL INCHES |
| CMLP | THREAD QUANTITY PER INCH | 12 |
| AAJE | THREAD PITCH DIAMETERS | +3.0750/+3.0803 INCHES |
| ABQU | DRIVE POINT DEPTH | 0.187 NOMINAL INCHES |
| BZRR | THREAD SERIES | BUTTRESS |