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 |
| 56878 |
SPS TECHNOLOGIES LLC DBA AEROSPACE D |
| 92215 |
ALCOA GLOBAL FASTENERS INC. DBA ALCO |
| 73197 |
HI-SHEAR CORPORATION |
| 80539 |
SPS TECHNOLOGIES LLC DBA AEROSPACE F |
| 17446 |
HUCK INTERNATIONAL INC. DBA ALCOA FA |
| 76301 |
BOEING COMPANY THE DBA BOEING |
| L4528 |
LISI AEROSPACE CANADA CORP |
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 |
| AASB |
FASTENER LENGTH |
1.390 INCHES MINIMUM AND 1.437 INCHES MAXIMUM |
| ANEE |
GRIP LENGTH |
0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM |
| CSYM |
SURFACE FINISH |
32.0 MICROINCHES GRIP |
| CRSQ |
COUNTERSINK ANGLE |
100.0 DEGREES NOMINAL |
| CRZS |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER |
0.140 INCHES MINIMUM FIRST HOLE AND 0.187 INCHES MAXIMUM FIRST HOLE |
| AAJD |
THREAD CLASS |
3A |
| AAWB |
SHANK UNTHREADED HOLE DIAMETER |
0.076 INCHES NOMINAL FIRST HOLE |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| 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 |
| AASK |
HEAD STYLE |
FLAT COUNTERSUNK |
| MATT |
MATERIAL |
IRON ALLOY 660 OVERALL |
| THSD |
THREAD SERIES DESIGNATOR |
UNF |
| AASA |
THREAD LENGTH |
0.250 INCHES MINIMUM |
| AAUR |
GRIP DIAMETER |
0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| ABQZ |
INTERNAL DRIVE STYLE |
HIGH-TORQUE |
| SFTT |
SURFACE TREATMENT |
CADMIUM OVERALL AND CHROMATE OVERALL |
| STDC |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION |
QQ-P-416 TYPE 2 CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
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