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 |
| 17446 |
HUCK INTERNATIONAL INC. DBA ALCOA FA |
| C4293 |
ALCOA FASTENING SYSTEMS FAIRCHILD FA |
| L4528 |
LISI AEROSPACE CANADA CORP |
| R1120 |
SATAIR A/S |
| 97928 |
HUCK INTL INC |
| K5063 |
HARRIS LIFTING AND SHIPPING TACKLE C |
| 92215 |
ALCOA GLOBAL FASTENERS INC. DBA ALCO |
| 73197 |
HI-SHEAR CORPORATION |
| 76301 |
BOEING COMPANY THE DBA BOEING |
| 56878 |
SPS TECHNOLOGIES LLC DBA AEROSPACE D |
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 |
| CRSQ |
COUNTERSINK ANGLE |
100.0 DEGREES NOMINAL |
| THSD |
THREAD SERIES DESIGNATOR |
UNJF |
| CRZS |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER |
1.031 INCHES MINIMUM FIRST HOLE AND 1.088 INCHES MAXIMUM FIRST HOLE |
| ANEE |
GRIP LENGTH |
0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM |
| AAJD |
THREAD CLASS |
3A |
| AHYM |
NOMINAL THREAD DIAMETER |
0.250 INCHES |
| STDC |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION |
MAC PS13145,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| CMLP |
THREAD QUANTITY PER INCH |
28 |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| AASK |
HEAD STYLE |
FLAT COUNTERSUNK |
| MATT |
MATERIAL |
STEEL OVERALL |
| AAUR |
GRIP DIAMETER |
0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| AASA |
THREAD LENGTH |
0.293 INCHES NOMINAL |
| ABQZ |
INTERNAL DRIVE STYLE |
HIGH-TORQUE |
| AASB |
FASTENER LENGTH |
1.152 INCHES MINIMUM AND 1.199 INCHES MAXIMUM |
| AAWB |
SHANK UNTHREADED HOLE DIAMETER |
0.076 INCHES MINIMUM FIRST HOLE AND 0.081 INCHES MAXIMUM FIRST HOLE |
| ZZZK |
SPECIFICATION/STANDARD DATA |
76301-ST3-562 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SFTT |
SURFACE TREATMENT |
CADMIUM OVERALL |
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