Part Details | EXTERNALLY RELIEVED BODY SCREW
5305-00-445-7247 An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.
Alternate Parts: 10674539, 5305-00-445-7247, 00-445-7247, 5305004457247, 004457247
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | JAN 08, 1971 | 00-445-7247 | 01852 ( SCREW, EXTERNALLY RELIEVED BODY ) |
REFERENCE DRAWINGS & PICTURES
CROWNED HEXAGON
CROSS RECESS TYPE 1
Cross Reference | NSN 5305-00-445-7247
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 10674539 | 18876 | U S ARMY AVIATION AND MISSILECOMMAND |
Technical Data | NSN 5305-00-445-7247
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.290 INCHES MINIMUM AND 0.340 INCHES MAXIMUM |
| FASTENER LENGTH | 1.610 INCHES MINIMUM AND 1.650 INCHES MAXIMUM |
| HEAD STYLE | 9 CROWNED HEXAGON |
| HEAD DIAMETER | 0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM |
| HEAD HEIGHT | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | 4 CROSS RECESS TYPE 1 |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 3 |
| FIRST DIAMETER FROM HEAD | 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM |
| SECOND DIAMETER FROM HEAD | 0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM |
| THIRD DIAMETER FROM HEAD | 0.179 INCHES MINIMUM AND 0.185 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 1.230 INCHES MINIMUM AND 1.270 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER | 1.310 INCHES MINIMUM AND 1.320 INCHES MAXIMUM |