Part Number
Definition:
A METALLIC HEADED FASTENER HAVING INTERNAL THREADS FOR A PORTION OF THE FULL LENGTH. IT MAY HAVE A SMOOTH, HEXAGON OR SPLINED SHANK WITH AN OPEN OR CLOSED END. IT IS DESIGNED TO BE EXPANDED TIGHTLY AGAINST THE MATERIAL IT IS BEING INSTALLED IN BY MEANS OF A SPECIAL TOOL. THE ITEM MUST HAVE A SPECIFIED GRIP RANGE. THE GRIP RANGE IS THE THICKNESS OF THE MATERIAL THE ITEM IS BEING INSTALLED IN. AN INTEGRAL FEATURE IS INCORPORATED FOR LOCKING ON THE THREADS OF A MATING MEMBER.
CAGE Information
| Code | Company |
|---|---|
| 81755 | LOCKHEED MARTIN CORPORATION DBA LOCK |
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 |
|---|---|---|
| CQJX | NOMINAL THREAD SIZE | 0.250 INCHES |
| BZRR | THREAD SERIES | UNF |
| AASK | HEAD STYLE | ELIPTICAL COUNTERSUNK |
| MATT | MATERIAL | STEEL COMP 303 OVERALL |
| ACVN | NUT LENGTH | 3.589 INCHES NOMINAL |
| AASU | HEAD HEIGHT | 0.040 INCHES NOMINAL |
| CSLM | HEAD MINOR COUNTERSINK ANGLE | 45.0 DEGREES MINIMUM AND 75.0 DEGREES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| AAUM | LOCKING FEATURE | ANY ACCEPTABLE |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AAJD | THREAD CLASS | 3B |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| AAZG | HEAD MAJOR DIAMETER | 0.436 INCHES MINIMUM AND 0.440 INCHES MAXIMUM |
| AAZH | HEAD MINOR DIAMETER | 0.370 INCHES MINIMUM AND 0.374 INCHES MAXIMUM |
| CRKK | HEAD MAJOR COUNTERSINK ANGLE | 76.0 DEGREES NOMINAL |