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 |
---|---|---|
CSYM | SURFACE FINISH | 32.0 MICROINCHES THREADS |
CSYM | SURFACE FINISH | 32.0 MICROINCHES THREADS |
CSYM | SURFACE FINISH | 32.0 MICROINCHES GRIP |
AASU | HEAD HEIGHT | 0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM |
AASA | THREAD LENGTH | 0.442 INCHES MINIMUM AND 0.509 INCHES MAXIMUM |
THSD | THREAD SERIES DESIGNATOR | UNJF |
MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | NAS621 COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
AAJD | THREAD CLASS | 3A |
AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
CMLP | THREAD QUANTITY PER INCH | 28 |
AAJF | THREAD DIRECTION | RIGHT-HAND |
ANEE | GRIP LENGTH | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
MATT | MATERIAL | TITANIUM ALLOY OVERALL |
ABQZ | INTERNAL DRIVE STYLE | HIGH-TORQUE |
FEAT | SPECIAL FEATURES | FURNISHED WITH ONE O-RING SEAL |
AASK | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT |
AAUR | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
AASB | FASTENER LENGTH | 0.952 INCHES MINIMUM AND 0.999 INCHES MAXIMUM |
CRSQ | COUNTERSINK ANGLE | 99.5 DEGREES MINIMUM AND 100.5 DEGREES MAXIMUM |
AASL | HEAD DIAMETER | 0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |