Part Number
Definition:
AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, NO 0 (0.060 IN.) (1.5 MM) OR LARGER. IT HAS A ROUND UNTHREADED NECK OR SHANK ALL OR PART OF WHICH IS OF GREATER DIAMETER THAN THE THREADED PORTION. THE HEAD IS DESIGNED TO BE DRIVEN WITH EITHER A WRENCH OR AN INSERTED DRIVER OR BOTH IN SIZES BELOW NO. 10 (0.190 IN.) (5 MM) NOMINAL DIAMETER. NO. 10 (0.190 IN.) (5 MM) AND LARGER SIZES MUST BE DESIGNED FOR ANY TYPE OF INSERTED DRIVER, BUT MAY ALSO PROVIDE FOR EXTERNAL WRENCHING OF THE HEAD. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. FOR ITEMS WHICH ARE BOTH SHOULDERED AND HAVE AN EXTERNALLY RELIEVED BODY, USE SCREW, EXTERNALLY RELIEVED BODY. FOR ITEMS WITH A NO. 10 (0.190 IN.) (5 MM) OR LARGER THREAD DIAMETER WITHOUT AN INSERTED DRIVER HEAD, USE BOLT, SHOULDER. EXCLUDES BOLT, INTERNAL WRENCHING AND SCREW, CAP, SOCKET HEAD.
CAGE Information
| Code | Company |
|---|---|
| 78286 | SIKORSKY AIRCRAFT CORPORATION |
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 |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | SS8414 FSCM 78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| AATN | SHOULDER DIAMETER | 0.811 INCHES MINIMUM FIRST SHOULDER AND 0.812 INCHES MAXIMUM FIRST SHOULDER |
| CWYB | SHOULDER SHAPE | ROUND ALL SHOULDERS |
| AATX | SHOULDER LENGTH | 2.750 INCHES NOMINAL SECOND SHOULDER |
| AASK | HEAD STYLE | PAN NO. 2 |
| AATX | SHOULDER LENGTH | 0.750 INCHES MINIMUM FIRST SHOULDER AND 0.752 INCHES MAXIMUM FIRST SHOULDER |
| ABQZ | INTERNAL DRIVE STYLE | SLOT |
| MATT | MATERIAL | STEEL COMP 630 OVERALL |
| AAJD | THREAD CLASS | 3A |
| AASB | FASTENER LENGTH | 3.938 INCHES NOMINAL |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.437 INCHES MAXIMUM |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| CRZS | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 3.751 INCHES NOMINAL FIRST HOLE |
| CQBC | MINIMUM TENSILE STRENGTH | 200000 POUNDS PER SQUARE INCH |
| AASU | HEAD HEIGHT | 0.122 INCHES NOMINAL |
| AAWB | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES NOMINAL FIRST HOLE |
| AASL | HEAD DIAMETER | 0.970 INCHES NOMINAL |
| AHYM | NOMINAL THREAD DIAMETER | 0.375 INCHES |
| AATN | SHOULDER DIAMETER | 0.748 INCHES MINIMUM SECOND SHOULDER AND 0.749 INCHES MAXIMUM SECOND SHOULDER |
| CQFM | HARDNESS RATING | 54.0 ROCKWELL C MINIMUM OVERALL AND 58.0 ROCKWELL C MAXIMUM OVERALL |
| SFTT | SURFACE TREATMENT | NICKEL OVERALL |