Part Number
Definition:
A HIGH STRENGTH, 160,000 POUNDS PER SQUARE INCH (1100 MEGAPASCALS) MINIMUM TENSILE STRENGTH EXTERNALLY THREADED FASTENER DESIGNED FOR USE IN APPLICATIONS INVOLVING GREAT SHEAR STRESS. THE HEAD IS DESIGNED TO ACCOMMODATE AN EXTERNAL WRENCH OR DRIVER. THE HEAD IS NOT DESIGNED TO BE HELD OR DRIVEN WITH AN INSERTED DRIVER, NOR IS IT DESIGNED FOR ROTATION BY THE THUMB AND FINGERS. THE UNTHREADED PORTION IS OF SPECIFIC GRIP LENGTH, PLATED OR UNPLATED, AND IS MACHINED TO A TOLERANCE OF ONE THOUSANDTH (0.001) OF AN INCH (0.025 MM) OR LESS OF A SPECIFIC DIAMETER FOR ITEMS ONE INCH (25 MM) OR LESS IN DIAMETER. ITEMS OVER ONE INCH (25 MM) IN DIAMETER SHALL HAVE A TOLERANCE OF FIFTEEN TEN THOUSANDTHS (0.0015) OF AN INCH (0.038 MM) OR LESS. THE NOMINAL MAJOR DIAMETER OF THE THREADS SHALL BE AT LEAST ONE THOUSANDTH (0.001) OF AN INCH (0.025 MM) BELOW THE MINIMUM SHANK DIAMETER, BUT NOT BELOW THE MINIMUM MAJOR DIAMETER FOR APPLICABLE CLASS OF FIT, AS SHOWN IN THE SCREW THREAD STANDARDS, FED STD H28 AND/OR OTHER NATIONALLY RECOGNIZED STANDARDS. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. SEE BOLT, MACHINE AND BOLT, CLEVIS.
CAGE Information
| Code | Company |
|---|---|
| 81755 | LOCKHEED MARTIN CORPORATION DBA LOCK |
Federal Supply Class
Title
BOLTS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| CQFM | HARDNESS RATING | 55.0 ROCKWELL C MINIMUM OVERALL AND 58.0 ROCKWELL C MAXIMUM OVERALL |
| AASU | HEAD HEIGHT | 0.257 INCHES NOMINAL |
| SFTT | SURFACE TREATMENT | NICKEL OVERALL AND CADMIUM OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNJF |
| AATB | WIDTH BETWEEN FLATS | 0.678 INCHES MINIMUM AND 0.689 INCHES MAXIMUM |
| AASA | THREAD LENGTH | 0.469 INCHES MINIMUM AND 0.536 INCHES MAXIMUM |
| ANEE | GRIP LENGTH | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM |
| AAJD | THREAD CLASS | 3A |
| CQBC | MINIMUM TENSILE STRENGTH | 300000 POUNDS PER SQUARE INCH |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| MATT | MATERIAL | STEEL OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| AASB | FASTENER LENGTH | 1.354 INCHES MINIMUM AND 1.401 INCHES MAXIMUM |
| AHYM | NOMINAL THREAD DIAMETER | 0.438 INCHES |
| AAUR | GRIP DIAMETER | 0.4358 INCHES MINIMUM AND 0.4367 INCHES MAXIMUM |
| AASK | HEAD STYLE | DOUBLE HEXAGON |
| CMLP | THREAD QUANTITY PER INCH | 20 |
| AAWU | SINGLE SHEAR STRENGTH | 180000 POUNDS PER SQUARE INCH |