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 |
| 80205 |
NATIONAL AEROSPACE STANDARDS COMMITT |
| 96906 |
MILITARY STANDARDS PROMULGATED BY MI |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC |
Requirements Statement |
Clear Text Reply |
| CSYM |
SURFACE FINISH |
32.0 MICROINCHES GRIP |
| MATT |
MATERIAL |
STEEL COMP 631 SPRING OR STEEL COMP 302 SPRING |
| MATT |
MATERIAL |
STEEL COMP 632 FASTENER |
| AASB |
FASTENER LENGTH |
2.043 INCHES MINIMUM AND 2.063 INCHES MAXIMUM |
| ABQZ |
INTERNAL DRIVE STYLE |
SLOT |
| THSD |
THREAD SERIES DESIGNATOR |
UNJF |
| CSYM |
SURFACE FINISH |
32.0 MICROINCHES BEARING SURFACE OF HEAD |
| CQBC |
MINIMUM TENSILE STRENGTH |
63000 POUNDS PER SQUARE INCH |
| AASU |
HEAD HEIGHT |
0.126 INCHES MINIMUM AND 0.141 INCHES MAXIMUM |
| AAJD |
THREAD CLASS |
3A |
| AHYM |
NOMINAL THREAD DIAMETER |
0.250 INCHES |
| CMLP |
THREAD QUANTITY PER INCH |
28 |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| AASK |
HEAD STYLE |
FLAT CHAMFER |
| ANEE |
GRIP LENGTH |
1.625 INCHES MINIMUM AND 1.641 INCHES MAXIMUM |
| AASA |
THREAD LENGTH |
0.277 INCHES MINIMUM AND 0.328 INCHES MAXIMUM |
| CRZS |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER |
1.948 INCHES MINIMUM FIRST HOLE AND 1.968 INCHES MAXIMUM FIRST HOLE |
| AASL |
HEAD DIAMETER |
0.477 INCHES MINIMUM AND 0.492 INCHES MAXIMUM |
| STDC |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION |
QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| AAUM |
LOCKING FEATURE |
DETENT BALL GRIP |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
AMS5673 ASSN STD 1ST MATERIAL RESPONSE SPRING OR ASTM A580 ASSN STD 2ND MATERIAL RESPONSE SPRING |
| 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 |
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