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 |
97928 |
HUCK INTL INC |
80539 |
SPS TECHNOLOGIES LLC DBA AEROSPACE F |
76301 |
BOEING COMPANY THE DBA BOEING |
L4528 |
LISI AEROSPACE CANADA CORP |
K5673 |
SPS TECHNOLOGIES LTD TJ BROOKS DIVIS |
73197 |
HI-SHEAR CORPORATION |
17446 |
HUCK INTERNATIONAL INC. DBA ALCOA FA |
56878 |
SPS TECHNOLOGIES LLC DBA AEROSPACE D |
92215 |
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 |
AHYM |
NOMINAL THREAD DIAMETER |
0.190 INCHES |
CSYM |
SURFACE FINISH |
32.0 MICROINCHES GRIP |
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 |
AAJF |
THREAD DIRECTION |
RIGHT-HAND |
AASU |
HEAD HEIGHT |
0.044 INCHES MINIMUM |
AASL |
HEAD DIAMETER |
0.376 INCHES MINIMUM AND 0.381 INCHES MAXIMUM |
ANEE |
GRIP LENGTH |
0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
MATT |
MATERIAL |
TITANIUM ALLOY OVERALL |
ABQZ |
INTERNAL DRIVE STYLE |
HIGH-TORQUE |
FEAT |
SPECIAL FEATURES |
FURNISHED WITH ONE O-RING SEAL |
AASA |
THREAD LENGTH |
0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM |
AASK |
HEAD STYLE |
FLAT COUNTERSUNK UNDERCUT |
AASB |
FASTENER LENGTH |
0.828 INCHES MINIMUM AND 0.875 INCHES MAXIMUM |
AAUR |
GRIP DIAMETER |
0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM |
CMLP |
THREAD QUANTITY PER INCH |
32 |
CRSQ |
COUNTERSINK ANGLE |
99.5 DEGREES MINIMUM AND 100.5 DEGREES MAXIMUM |
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