| ZF INDUSTRIEANTRIEBE WITTEN GMBH | D9182 |
| RAYTHEON COMPANY | 49956 |
| RAYTHEON CO EQUIPMENT DEVELOPMENT LAB | 99687 |
| NEW HAVEN MFG CORP AMATOM ELECTRONIC HARDWARE DIV | 6540 |
| CAREY MANUFACTURING COMPANY, INC. | 1YGB8 |
| NEW HAVEN MFG CORP AMATOM ELECTRONIC HARDWARE DIV | 6540 |
| CAREY MANUFACTURING COMPANY, INC. | 1YGB8 |
| U S ARMY AVIATION AND MISSILE COMMAND | 18876 |
| V I P ELECTRONIC HARDWARE INC | 51196 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM |
| FASTENER LENGTH | 1.099 INCHES MINIMUM AND 1.141 INCHES MAXIMUM |
| HEAD STYLE | KNURLED NO. 4 |
| HEAD DIAMETER | 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM |
| HEAD HEIGHT | 0.547 INCHES MINIMUM AND 0.578 INCHES MAXIMUM |
| FIRST DIAMETER FROM HEAD | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| MATERIAL | STEEL COMP 303 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD SERIES DESIGNATOR | UNC |
| 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. ( . 6 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. 1 ( .19 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. |
