Part Number
Part Number:
NSN:
NIIN:
Item Name:
SCREW , CAP , HEXAGON HEAD
Definition:
AN EXTERNALLY THREADED FASTENER DESIGNED FOR INSERTION INTO HOLES IN ASSEMBLED PARTS, FOR MATING WITH A PREFORMED INTERNAL THREAD AND FOR TIGHTENING OR RELEASING BY TORQUING THE HEAD. THE THREADED AND UNTHREADED PORTIONS ARE BOTH OF THE SAME NOMINAL DIAMETER OF 0.190 INCH (5 MM) OR LARGER. HEAD DIMENSIONS AND SIZES OF THREADED AND UNTHREADED PORTIONS SHALL CONFORM TO INTERNATIONALLY RECOGNIZED FASTENER STANDARDS. THE THREAD LENGTH BEING THE CONTROLLED DIMENSION, THE GRIP LENGTH IS NOT SPECIFIED. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. EXCLUDES BOLT, MACHINE; BOLT, EXTERNALLY RELIEVED BODY; BOLT, INTERNAL WRENCHING; AND SCREW, CAP, SOCKET HEAD.
CAGE Information
| Code | Company |
|---|---|
| 25685 | NAVAL SHIP ENGINEERING CENTER PHILAD |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281,CL A FED SPEC 1ST MATERIAL RESPONSE OVERALL OR QQ-N-281,CL B FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281,CL A FED SPEC 1ST MATERIAL RESPONSE OVERALL OR QQ-N-281,CL B FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| AASA | THREAD LENGTH | 1.250 INCHES MINIMUM AND 1.440 INCHES MAXIMUM |
| AATB | WIDTH BETWEEN FLATS | 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM |
| MATT | MATERIAL | NICKEL ALLOY 400 OVERALL OR NICKEL ALLOY R-405 OVERALL |
| AHYM | NOMINAL THREAD DIAMETER | 0.500 INCHES |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| AAJD | THREAD CLASS | 2A |
| AASK | HEAD STYLE | HEXAGON |
| AASB | FASTENER LENGTH | 2.440 INCHES MINIMUM AND 2.500 INCHES MAXIMUM |
| AASU | HEAD HEIGHT | 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 13 |