Part Details | SOCKET HEAD CAP SCREW
5305-01-318-5234 An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.
Alternate Parts: 1420UNC3AX12 IN. LG., 1/4-20UNC-3AX1/2 IN. LG., FFS86, FF-S-86, 1420UNC3A X 12 LG, 1/4-20UNC-3A X 1/2 LG, QQN286,0.25020 UNC3AX2.00, QQN286,0.250-20 UNC-3AX2.00, FFS86,TYVI, FF-S-86,TY-VI, FFS86 1420U NC 3A12 IN, FF-S-86 1/4-20U NC 3A-1/2 IN, 5305-01-318-5234, 01-318-5234, 5305013185234, 013185234
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | APR 19, 1990 | 01-318-5234 | 16282 ( SCREW, CAP, SOCKET HEAD ) |
REFERENCE DRAWINGS & PICTURES
CROWNED HEXAGON
HEXAGON
Cross Reference | NSN 5305-01-318-5234
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 1/4-20UNC-3AX1/2 IN. LG. | 80204 | AMERICAN NATIONAL STANDARDSINSTITUTE, INCORPORATED |
| FF-S-86 | 81348 | FEDERAL SPECIFICATIONSPROMULGATED BY GENERAL SERVICES |
| 1/4-20UNC-3A X 1/2 LG | 53711 | NAVAL SEA SYSTEMS COMMAND |
| QQN286,0.250-20 UNC-3AX2.00 | D9182 | ZF INDUSTRIEANTRIEBE WITTEN GMBH |
| FF-S-86,TY-VI | D9182 | ZF INDUSTRIEANTRIEBE WITTEN GMBH |
| FF-S-86 1/4-20U NC 3A-1/2 IN | D9182 | ZF INDUSTRIEANTRIEBE WITTEN GMBH |
Technical Data | NSN 5305-01-318-5234
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.400 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| FASTENER LENGTH | 0.500 INCHES NOMINAL |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 40000 POUNDS PER SQUARE INCH |
| HEAD STYLE | 9 CROWNED HEXAGON |
| HEAD DIAMETER | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| HEAD HEIGHT | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.188 INCHES NOMINAL |
| NONDEFINITIVE SPEC/STD DATA | 6 TYPE |