National Stock Number (NSN) Output Data
NSN:
NIIN:
Item Name:
SCREW , CLOSE TOLERANCE
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.
Reference/Part Number
CAGE Information
Code |
Company |
06950 |
ALCOA GLOBAL FASTENERS INC. DBA ALCO |
L4528 |
LISI AEROSPACE CANADA CORP |
50394 |
SPS TECHNOLOGIES INC UNBRAKO DIV |
C4293 |
ALCOA FASTENING SYSTEMS FAIRCHILD FA |
80539 |
SPS TECHNOLOGIES LLC DBA AEROSPACE F |
0PTK6 |
SPS TECHNOLOGIES INC |
97928 |
HUCK INTL INC |
58998 |
EMHART TEKNOLOGIES LLC DBA FASTENER |
R1120 |
SATAIR A/S |
17446 |
HUCK INTERNATIONAL INC. DBA ALCOA FA |
73197 |
HI-SHEAR CORPORATION |
60516 |
WEST COAST AEROSPACE INC |
76301 |
BOEING COMPANY THE DBA BOEING |
92215 |
ALCOA GLOBAL FASTENERS INC. DBA ALCO |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
MRC |
Requirements Statement |
Clear Text Reply |
AASL |
HEAD DIAMETER |
0.497 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
AASL |
HEAD DIAMETER |
0.497 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
CRSQ |
COUNTERSINK ANGLE |
99.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM |
THSD |
THREAD SERIES DESIGNATOR |
UNJF |
MATT |
MATERIAL |
STEEL CORROSION RESISTING OVERALL |
AAJD |
THREAD CLASS |
3A |
AHYM |
NOMINAL THREAD DIAMETER |
0.250 INCHES |
CMLP |
THREAD QUANTITY PER INCH |
28 |
AAJF |
THREAD DIRECTION |
RIGHT-HAND |
AASK |
HEAD STYLE |
FLAT COUNTERSUNK |
ANEE |
GRIP LENGTH |
0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
AASA |
THREAD LENGTH |
0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
AASB |
FASTENER LENGTH |
0.819 INCHES MINIMUM AND 0.866 INCHES MAXIMUM |
ABQZ |
INTERNAL DRIVE STYLE |
HIGH-TORQUE |
AAUR |
GRIP DIAMETER |
0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
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