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 |
06725 |
SPS TECHNOLOGIES LLC DBA AIR INDUSTR |
81755 |
LOCKHEED MARTIN CORPORATION DBA LOCK |
93907 |
TEXTRON FASTENING SYSTEMS DBA DECORA |
92215 |
ALCOA GLOBAL FASTENERS INC. DBA ALCO |
L4528 |
LISI AEROSPACE CANADA CORP |
73197 |
HI-SHEAR CORPORATION |
Characteristics (Decoded)
MRC |
Requirements Statement |
Clear Text Reply |
CSYM |
SURFACE FINISH |
32.0 MICROINCHES THREADS |
CMLP |
THREAD QUANTITY PER INCH |
24 |
CSYM |
SURFACE FINISH |
32.0 MICROINCHES GRIP |
CRSQ |
COUNTERSINK ANGLE |
60.0 DEGREES NOMINAL |
AASL |
HEAD DIAMETER |
0.531 INCHES MINIMUM AND 0.558 INCHES MAXIMUM |
THSD |
THREAD SERIES DESIGNATOR |
UNJF |
FEAT |
SPECIAL FEATURES |
BEARING SURFACE OF HEAD GROOVED TO 0.394 IN. MIN,0.396 IN. MAX DIA,0.092 IN. MIN,0.097 IN. MAX LG FROM TOP OF HEAD |
AASB |
FASTENER LENGTH |
1.683 INCHES MINIMUM AND 1.713 INCHES MAXIMUM |
CQBC |
MINIMUM TENSILE STRENGTH |
160000 POUNDS PER SQUARE INCH |
AAJD |
THREAD CLASS |
3A |
AASA |
THREAD LENGTH |
0.423 INCHES MINIMUM AND 0.473 INCHES MAXIMUM |
AAJF |
THREAD DIRECTION |
RIGHT-HAND |
AASK |
HEAD STYLE |
FLAT COUNTERSUNK |
MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
NAS 621,6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
AAUR |
GRIP DIAMETER |
0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM |
MATT |
MATERIAL |
TITANIUM ALLOY UNS R54520 OVERALL |
ANEE |
GRIP LENGTH |
1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM |
ABQZ |
INTERNAL DRIVE STYLE |
OFFSET CRUCIFORM (TORQUE SET) |
AHYM |
NOMINAL THREAD DIAMETER |
0.312 INCHES |
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