Part Details | EXTERNALLY RELIEVED BODY SCREW
5305-00-978-7943 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: P44F734, 610074P23, 6238SS08327, 6238SS0832-7, P44F734, 0N017758, 6238SS08327, 6238SS0832-7, 6238SS0832, 2900230004, 290-023-0004, 5305-00-978-7943, 00-978-7943, 5305009787943, 009787943
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | OCT 14, 1966 | 00-978-7943 | 01852 ( SCREW, EXTERNALLY RELIEVED BODY ) |
REFERENCE DRAWINGS & PICTURES
CROWNED HEXAGON
CROSS RECESS TYPE 1
Cross Reference | NSN 5305-00-978-7943
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| P44F734 | 64959 | AMERICAN TELEPHONE AND TELEGRAPH CO |
| 610074P23 | 94117 | BAE SYSTEMS INFORMATION ANDELECTRONIC SYSTEMS INTEGRATION INC. |
| 6238SS0832-7 | 1YGB8 | CAREY MANUFACTURING COMPANY, INC.DBA AMATOM ELECTRONIC HARDWARE |
| P44F734 | 3B4M0 | LUCENT TECHNOLOGIES INCCORPORATE HEADQUARTERS |
| 0N017758 | 98230 | NATIONAL SECURITY AGENCY |
| 6238SS0832-7 | 06540 | NEW HAVEN MFG CORPAMATOM ELECTRONIC HARDWARE DIV |
| 6238SS0832 | 06540 | NEW HAVEN MFG CORPAMATOM ELECTRONIC HARDWARE DIV |
| 290-023-0004 | 95542 | NORTHROP GRUMMAN SYSTEMS CORPORATION |
Technical Data | NSN 5305-00-978-7943
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM |
| FASTENER LENGTH | 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM |
| HEAD STYLE | 4 CROWNED HEXAGON |
| HEAD DIAMETER | 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| HEAD HEIGHT | 0.102 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | 4 CROSS RECESS TYPE 1 |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| FIRST DIAMETER FROM HEAD | 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.532 INCHES MINIMUM AND 0.552 INCHES MAXIMUM |