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MS21093-0834

Military Standard Machine Screw

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Description

Fastener Length: 1/2", Thread: 8-32, Thread Length: 7/16", MS21093 series screw

Specifications

Countersink Angle 99.0 degrees minimum and 101.0 degrees maximum
Departure From Cited Designator As modified by locking feature
Fastener Length 0.469 inches minimum and 0.500 inches maximum
Head Diameter 0.300 inches minimum and 0.332 inches maximum
Head Style Flat countersunk
Internal Drive Style Cross recess type 1
Length 1/2
Locking Feature Pellet or strip or patch
Material Steel
Min. Tensile Strength (psi) 60000 pounds per square inch
Nondefinitive Specification/Std Data 3 type and 3c style
Screw Material Steel
Screw Material Specification Qq-s-634 fed spec single material response or qq-s-637 fed spec single material response or 66 fed std single material response
Screw Surface Treatment Cadmium and chromate
Screw Surface Treatment Specification Qq-p-416 ty 2 cl 3 fed spec single treatment response
Thread Class 2a
Thread Diameter 0.164
Thread Direction Right-hand
Thread Length 0.335 inches minimum and 0.438 inches maximum
Thread Qty 32
Thread Qty Per Inch (tpi) 32
Thread Series Designator UNC
Thread Size 8

Other sizes

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Catalog data updated 2026-07-05. Report a data error