Part Number
Part Number:
NSN:
NIIN:
Item Name:
BOLT , INTERNALLY RELIEVED BODY
Definition:
AN EXTERNALLY THREADED FASTENER WHOSE EXTERNAL THREADED PORTION IS OF ONE NOMINAL DIAMETER. IT HAS A CONCENTRIC HOLE ALONG THE LONGITUDINAL CENTERLINE WHICH MAY EXTEND A PART OR THE FULL LENGTH OF THE BOLT. THE CONCENTRIC HOLE ALONG THE CENTERLINE MAY BE COUNTERBORED AND/OR INTERNALLY THREADED AT THE HEAD END OR THE BOLT END. THE HEAD IS DESIGNED TO BE HELD OR DRIVEN BY AN EXTERNAL AND/OR INTERNAL DRIVER. FOR ITEMS HAVING A HOLE(S) PERPENDICULAR TO THE AXIS WHICH MEET THE CONCENTRIC HOLE ALONG THE LONGITUDINAL CENTERLINE, SEE BOLT, FLUID PASSAGE.
CAGE Information
| Code | Company |
|---|---|
| 78286 | SIKORSKY AIRCRAFT CORPORATION |
Federal Supply Class
Title
BOLTS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| AASU | HEAD HEIGHT | 0.500 INCHES NOMINAL |
| AASU | HEAD HEIGHT | 0.500 INCHES NOMINAL |
| AAWX | CONCENTRIC HOLE DEPTH | 1.475 INCHES NOMINAL |
| THSD | THREAD SERIES DESIGNATOR | UNJF |
| CQFM | HARDNESS RATING | 51.0 ROCKWELL C MINIMUM OVERALL AND 54.0 ROCKWELL C MAXIMUM OVERALL |
| MATT | MATERIAL | STEEL COMP 4340 OVERALL |
| CQBC | MINIMUM TENSILE STRENGTH | 260000 POUNDS PER SQUARE INCH |
| AAJD | THREAD CLASS | 3A |
| AASB | FASTENER LENGTH | 7.140 INCHES NOMINAL |
| SFTT | SURFACE TREATMENT | NICKEL GRIP |
| FEAT | SPECIAL FEATURES | COUNTERBORE HEAD 0.750 INCH DIA BY 1.700 INCH DEPTH |
| AAWB | SHANK UNTHREADED HOLE DIAMETER | 0.141 INCHES MINIMUM FIRST HOLE AND 0.151 INCHES MAXIMUM FIRST HOLE |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.840 INCHES MINIMUM |
| SFTT | SURFACE TREATMENT | CADMIUM THREADS |
| SFTT | SURFACE TREATMENT | NICKEL HEAD |
| AASK | HEAD STYLE | HEXAGON |
| AATB | WIDTH BETWEEN FLATS | 1.427 INCHES MINIMUM AND 1.440 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 12 |
| STYL | STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| AHYM | NOMINAL THREAD DIAMETER | 1.000 INCHES |
| AAXC | CONCENTRIC HOLE DIAMETER | 0.750 INCHES NOMINAL |
| CRZS | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 6.800 INCHES NOMINAL FIRST HOLE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | SS8428 DALIC FSCM 78286 MFR REF SINGLE TREATMENT RESPONSE THREADS |