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 |
| 73197 |
HI-SHEAR CORPORATION |
| 84256 |
AVIBANK MFG. INC. |
| 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 |
| ASDB |
WIDTH ACROSS FLATS |
0.250 INCHES NOMINAL |
| AASB |
FASTENER LENGTH |
1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM |
| CRSQ |
COUNTERSINK ANGLE |
100.0 DEGREES NOMINAL |
| THSD |
THREAD SERIES DESIGNATOR |
UNJF |
| AAJD |
THREAD CLASS |
3A |
| AHYM |
NOMINAL THREAD DIAMETER |
0.250 INCHES |
| CMLP |
THREAD QUANTITY PER INCH |
28 |
| CSYM |
SURFACE FINISH |
63.0 MICROINCHES GRIP |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| CRZS |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER |
1.016 INCHES NOMINAL FIRST HOLE |
| AASK |
HEAD STYLE |
FLAT COUNTERSUNK |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| ANEE |
GRIP LENGTH |
0.625 INCHES MINIMUM AND 0.641 INCHES MAXIMUM |
| CSYM |
SURFACE FINISH |
63.0 MICROINCHES BEARING SURFACE OF HEAD |
| AASA |
THREAD LENGTH |
0.344 INCHES MINIMUM AND 0.395 INCHES MAXIMUM |
| FEAT |
SPECIAL FEATURES |
RETAINING ELEMENT IN SHANK |
| MATT |
MATERIAL |
STEEL COMP XM-13 OVERALL |
| ABQZ |
INTERNAL DRIVE STYLE |
HEXAGON |
| AAWB |
SHANK UNTHREADED HOLE DIAMETER |
0.076 INCHES MINIMUM FIRST HOLE AND 0.086 INCHES MAXIMUM FIRST HOLE |
| SFTT |
SURFACE TREATMENT |
PASSIVATE OVERALL |
| AAUR |
GRIP DIAMETER |
0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM |
| AASL |
HEAD DIAMETER |
0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
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