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 |
56878 |
SPS TECHNOLOGIES LLC DBA AEROSPACE D |
60516 |
WEST COAST AEROSPACE INC |
76301 |
BOEING COMPANY THE DBA BOEING |
97928 |
HUCK INTL INC |
92215 |
ALCOA GLOBAL FASTENERS INC. DBA ALCO |
1VSL7 |
HOUSTON PRECISION FASTENER L.L.C. |
80539 |
SPS TECHNOLOGIES LLC DBA AEROSPACE F |
58998 |
EMHART TEKNOLOGIES LLC DBA FASTENER |
73197 |
HI-SHEAR CORPORATION |
K5673 |
SPS TECHNOLOGIES LTD TJ BROOKS DIVIS |
17446 |
HUCK INTERNATIONAL INC. DBA ALCOA FA |
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 GRIP |
AASU |
HEAD HEIGHT |
0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM |
CRSQ |
COUNTERSINK ANGLE |
100.0 DEGREES NOMINAL |
AASA |
THREAD LENGTH |
0.442 INCHES MINIMUM AND 0.509 INCHES MAXIMUM |
THSD |
THREAD SERIES DESIGNATOR |
UNJF |
AAJD |
THREAD CLASS |
3A |
AHYM |
NOMINAL THREAD DIAMETER |
0.250 INCHES |
CMLP |
THREAD QUANTITY PER INCH |
28 |
AAJF |
THREAD DIRECTION |
RIGHT-HAND |
AASL |
HEAD DIAMETER |
0.501 INCHES MINIMUM AND 0.506 INCHES MAXIMUM |
AASB |
FASTENER LENGTH |
1.140 INCHES MINIMUM AND 1.187 INCHES MAXIMUM |
ANEE |
GRIP LENGTH |
0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM |
MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
NAS 621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
MATT |
MATERIAL |
TITANIUM ALLOY UNS R54520 OVERALL |
ABQZ |
INTERNAL DRIVE STYLE |
HIGH-TORQUE |
AASK |
HEAD STYLE |
FLAT COUNTERSUNK UNDERCUT |
AAUR |
GRIP DIAMETER |
0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
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