Part Number
Part Number:
NSN:
NIIN:
Item Name:
BOLT , CLOSE TOLERANCE
Definition:
AN EXTERNALLY THREADED FASTENER WHOSE UNTHREADED PORTION IS OF A SPECIFIED GRIP LENGTH, PLATED OR UNPLATED, AND IS MACHINED TO A TOLERANCE OF ONE THOUSANDTH (0.001) OF AN INCH (0.025 MM) OR LESS OF A SPECIFIC DIAMETER FOR ITEMS ONE INCH (25 MM) OR LESS IN DIAMETER. ITEMS OVER ONE INCH (25 MM) IN DIAMETER SHALL HAVE A TOLERANCE OF FIFTEEN TEN-THOUSANDTHS (0.0015) OF AN INCH (0.038 MM) OR LESS. THE NOMINAL MAJOR DIAMETER OF THE THREADS SHALL BE AT LEAST ONE THOUSANDTH (0.001) OF AN INCH (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 NOT DESIGNED TO BE HELD OR DRIVEN WITH AN INSERTED DRIVER, NOR IS IT DESIGNED FOR ROTATION BY THE THUMB AND FINGERS. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. FOR ITEMS HAVING CLOSE TOLERANCE, AND FABRICATED FROM MATERIAL HAVING 160,000 POUNDS PER SQUARE INCH (1100 MEGAPASCALS) MINIMUM TENSILE STRENGTH, SEE BOLT, SHEAR. FOR ITEMS FABRICATED FROM MATERIAL HAVING LESS THAN 160,000 POUNDS PER SQUARE INCH (1100 MEGAPASCALS) MINIMUM TENSILE STRENGTH AND NOT HAVING A CLOSE TOLERANCE, SEE BOLT, MACHINE.
CAGE Information
| Code |
Company |
| 80205 |
NATIONAL AEROSPACE STANDARDS COMMITT |
Characteristics (Decoded)
| MRC |
Requirements Statement |
Clear Text Reply |
| AATB |
WIDTH BETWEEN FLATS |
0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| THSD |
THREAD SERIES DESIGNATOR |
UNJF |
| AASB |
FASTENER LENGTH |
2.972 INCHES MINIMUM AND 3.002 INCHES MAXIMUM |
| ANEE |
GRIP LENGTH |
2.422 INCHES MINIMUM AND 2.452 INCHES MAXIMUM |
| AAJD |
THREAD CLASS |
3A |
| AASU |
HEAD HEIGHT |
0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM |
| AHYM |
NOMINAL THREAD DIAMETER |
0.250 INCHES |
| AAUR |
GRIP DIAMETER |
0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM |
| CMLP |
THREAD QUANTITY PER INCH |
28 |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
AMS6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS6484 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS6382 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS6349 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| STDC |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION |
AMS-QQ-P-416, TYPE II. CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| AASA |
THREAD LENGTH |
0.425 INCHES NOMINAL |
| AASK |
HEAD STYLE |
HEXAGON |
| MATT |
MATERIAL |
STEEL COMP 4340 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 8740 OVERALL |
| CXCY |
PART NAME ASSIGNED BY CONTROLLING AGENCY |
BOLT, TENSION, HEX HEAD, CLOSE TOLERANCE, ALLOY STEEL, LONG THREAD, REDUCED MAJOR DIAMETER, NON-LOCKING, 160 KSI FTU |
| SFTT |
SURFACE TREATMENT |
CADMIUM OVERALL |
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