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 |
| 26512 |
NORTHROP GRUMMAN SYSTEMS CORPORATION |
| 29372 |
ALCOA GLOBAL FASTENERS INC. DBA ALCO |
| 84256 |
AVIBANK MFG. INC. |
| D9182 |
BOSCH REXROTH GMBH LOHMANN STOLTERFO |
| 92215 |
ALCOA GLOBAL FASTENERS INC. DBA ALCO |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC |
Requirements Statement |
Clear Text Reply |
| CMLP |
THREAD QUANTITY PER INCH |
24 |
| CMLP |
THREAD QUANTITY PER INCH |
24 |
| AAUR |
GRIP DIAMETER |
0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM |
| AASA |
THREAD LENGTH |
0.306 INCHES MINIMUM AND 0.357 INCHES MAXIMUM |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
QQ-S-764 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| CQBC |
MINIMUM TENSILE STRENGTH |
180000 POUNDS PER SQUARE INCH |
| ABQZ |
INTERNAL DRIVE STYLE |
SLOT |
| MATT |
MATERIAL |
STEEL COMP 303 OVERALL |
| AAJD |
THREAD CLASS |
3A |
| CSYM |
SURFACE FINISH |
63.0 MICROINCHES GRIP |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| AASU |
HEAD HEIGHT |
0.157 INCHES MINIMUM AND 0.172 INCHES MAXIMUM |
| AASK |
HEAD STYLE |
CROWNED HEXAGON |
| CRZS |
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER |
3.250 INCHES MINIMUM FIRST HOLE AND 3.266 INCHES MAXIMUM FIRST HOLE |
| CSYM |
SURFACE FINISH |
63.0 MICROINCHES BEARING SURFACE OF HEAD |
| THSD |
THREAD SERIES DESIGNATOR |
UNF |
| AATB |
WIDTH BETWEEN FLATS |
0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| ANEE |
GRIP LENGTH |
2.875 INCHES MINIMUM AND 2.891 INCHES MAXIMUM |
| FEAT |
SPECIAL FEATURES |
RETAINING ELEMENT IN SHANK |
| AASB |
FASTENER LENGTH |
3.353 INCHES MINIMUM AND 3.373 INCHES MAXIMUM |
| SFTT |
SURFACE TREATMENT |
CADMIUM OVERALL AND CHROMATE OVERALL |
| CQFM |
HARDNESS RATING |
39.0 ROCKWELL C MINIMUM OVERALL AND 46.0 ROCKWELL C MAXIMUM OVERALL |
| STDC |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION |
QQ-P-416,TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| AHYM |
NOMINAL THREAD DIAMETER |
0.312 INCHES |
| AAWB |
SHANK UNTHREADED HOLE DIAMETER |
0.076 INCHES MINIMUM FIRST HOLE AND 0.086 INCHES MAXIMUM FIRST HOLE |
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