Part Number: MS51959-97

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CONDITION:
NS
MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M96906
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.764 INCHES MINIMUM AND 0.875 INCHES MAXIMUM
FASTENER LENGTH0.875 INCHES NOMINAL
HEAD STYLEFLAT COUNTERSUNK
HEAD DIAMETER0.568 INCHES MINIMUM AND 0.635 INCHES MAXIMUM
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
NOMINAL THREAD DIAMETER0.312 INCHES
THREAD QUANTITY PER INCH18
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
SCREW MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316
SCREW MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES
SCREW SURFACE TREATMENTPASSIVATE
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
THREAD SERIES DESIGNATORUNC
STYLE DESIGNATOR102 COUNTERSINK EXTERNAL TEETH
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.