Part Number
Definition:
A SCREW, MACHINE OR SCREW, CAP, SOCKET HEAD WHOSE UNTHREADED PORTION IS OF SPECIFIED GRIP LENGTH, PLATED OR UNPLATED, AND IS MACHINED TO A TOLERANCE OF ONE THOUSANDTH (0.001 IN.) (0.025 MM) OR LESS OF A SPECIFIC DIAMETER FOR ITEMS (1.000 IN.) (25 MM) OR LESS IN DIAMETER. ITEMS OVER (1.000 IN.) (25 MM) IN DIAMETER SHALL HAVE A TOLERANCE OF FIFTEEN TEN THOUSANDTHS (0.0015 IN.) (0.038 MM) OR LESS. THE NOMINAL MAJOR DIAMETER OF THE THREADS SHALL BE AT LEAST ONE THOUSANDTH (0.001 IN.) (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. THE HEAD IS DESIGNED TO BE HELD OR DRIVEN WITH AN INSERTED DRIVER. IT IS NOT DESIGNED FOR ROTATION BY THE THUMB AND FINGERS. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS.
CAGE Information
Code | Company |
---|---|
06950 | ALCOA GLOBAL FASTENERS INC. DBA ALCO |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
MRC | Requirements Statement | Clear Text Reply |
---|---|---|
AASB | FASTENER LENGTH | 1.111 INCHES MINIMUM AND 1.158 INCHES MAXIMUM |
THSD | THREAD SERIES DESIGNATOR | UNJF |
CQFM | HARDNESS RATING | 51.0 ROCKWELL C MINIMUM OVERALL AND 54.0 ROCKWELL C MAXIMUM OVERALL |
AAUR | GRIP DIAMETER | 0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM |
CQBC | MINIMUM TENSILE STRENGTH | 260000 POUNDS PER SQUARE INCH |
AAJD | THREAD CLASS | 3A |
AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
CMLP | THREAD QUANTITY PER INCH | 28 |
MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | AMS6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
AAJF | THREAD DIRECTION | RIGHT-HAND |
STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-8837 TYPE 2 CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
AASK | HEAD STYLE | FLAT COUNTERSUNK |
CRSQ | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
AASL | HEAD DIAMETER | 0.447 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
AASA | THREAD LENGTH | 0.351 INCHES MINIMUM AND 0.418 INCHES MAXIMUM |
AAWB | SHANK UNTHREADED HOLE DIAMETER | 0.071 INCHES MINIMUM FIRST HOLE AND 0.081 INCHES MAXIMUM FIRST HOLE |
ABQZ | INTERNAL DRIVE STYLE | HIGH-TORQUE |
SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
CRZS | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.943 INCHES MINIMUM FIRST HOLE AND 0.975 INCHES MAXIMUM FIRST HOLE |
MATT | MATERIAL | STEEL COMP H11 OVERALL |
ANEE | GRIP LENGTH | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM |