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 |
|---|---|---|
| AAZH | HEAD MINOR DIAMETER | 0.372 INCHES NOMINAL |
| CQJX | NOMINAL THREAD SIZE | 0.250 INCHES |
| BZRR | THREAD SERIES | UNF |
| AASK | HEAD STYLE | ELIPTICAL COUNTERSUNK |
| CSLM | HEAD MINOR COUNTERSINK ANGLE | 60.0 DEGREES NOMINAL |
| AZKQ | TEMP RATING | 450.0 DEG FAHRENHEIT NOMINAL |
| MATT | MATERIAL | STEEL COMP 304 OVERALL OR STEEL COMP 305 OVERALL |
| CQFM | HARDNESS RATING | NOT RATED |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| ACTA | NUT STYLE | BLIND RIVET W/SMOOTH ROUND SHANK |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| ACTD | NUT DIAMETER | 0.327 INCHES NOMINAL |
| AAJD | THREAD CLASS | 3B |
| AAZG | HEAD MAJOR DIAMETER | 0.438 INCHES NOMINAL |
| ACVN | NUT LENGTH | 0.797 INCHES NOMINAL |
| ADFN | SHANK END TYPE | CLOSED |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,CL 304,COND A FED SPEC 1ST MATERIAL RESPONSE OVERALL OR QQ-S-763,CL 305 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| CRKK | HEAD MAJOR COUNTERSINK ANGLE | 76.0 DEGREES NOMINAL |
| ADEY | NUT GRIP RANGE | +0.280/+0.340 INCHES |
| SFTT | SURFACE TREATMENT | PASSIVATE OVERALL |
| AASU | HEAD HEIGHT | 0.072 INCHES NOMINAL |
| AAUM | LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |