Machine Screw NSN: 5305-00-207-2793 P/N: MS24694C98

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Machine Screw- An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 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. 10 (0.190 in./5 mm). no. 10 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.

Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Fastener Length: 0.703 inches minimum and 0.750 inches maximum
Head Diameter: 0.447 inches minimum and 0.507 inches maximum
Head Style: Flat countersunk
Minimum Tensile Strength: 85000 pounds per square inch
Nominal Thread Diameter: 0.250 inches
Internal Drive Style: Cross recess type 1
Screw Material Document And Classification: 66 fed std all material responses
Screw Material: Steel comp 302 or steel comp 304
Screw Surface Treatment Document And Classification: Qq-p-35 fed spec single treatment response
Screw Surface Treatment: Passivate
Thread Class: 3a
Thread Direction: Right-hand
Thread Length: 0.429 inches minimum and 0.578 inches maximum
Thread Quantity Per Inch: 28
Thread Series Designator: Unf

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