MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | 96906 |
THREAD CLASS | 2A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.388 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
FASTENER LENGTH | 0.438 INCHES NOMINAL |
HEAD STYLE | FILLISTER |
HEAD DIAMETER | 0.166 INCHES MINIMUM AND 0.183 INCHES MAXIMUM |
HEAD HEIGHT | 0.072 INCHES MINIMUM AND 0.079 INCHES MAXIMUM |
HOLE DIAMETER | 0.037 INCHES NOMINAL |
INTERNAL DRIVE STYLE | SLOT |
NOMINAL THREAD DIAMETER | 0.112 INCHES |
HOLE QUANTITY | 1 |
THREAD QUANTITY PER INCH | 40 |
MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
SCREW MATERIAL | STEEL |
SCREW MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE |
SCREW SURFACE TREATMENT | CADMIUM AND CHROMATE |
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE |
HEAD HOLE CONFIGURATION STYLE | ROUND |
THREAD SERIES DESIGNATOR | UNC |
An externally threaded fastener whose threaded portion is of one nominal diameter, No ( . 6 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 1 ( .19 in./5 mm). No. 1 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal 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. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD. |