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NAS1351-4LB24P

Socket Head Screw

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Description

Fastener Length: 1-17/32", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1-"

Specifications

Fastener Length 1.484 inches minimum and 1.531 inches maximum
Hardness Rating 36.0 rockwell c minimum and 45.0 rockwell c maximum
Head Diameter 0.365 inches minimum and 0.375 inches maximum
Head Height 0.244 inches minimum and 0.250 inches maximum
Head Style Flat chamfer
Internal Drive Style Hexagon
Length 1 17/32
Locking Feature Pellet threads
Material Plastic
Material Specification 66 fed std single material response
Min. Tensile Strength (psi) 160000 pounds per square inch
Minimum Yield Strength 130000 pounds per square inch
Specification Data 80205-nas1351 professional/industrial association standard
Surface Treatment Cadmium and chromate
Surface Treatment Specification Qq-p-416,type 2 class 2 fed spec single treatment response fastener
Thread Class 3a
Thread Diameter 0.250
Thread Direction Right-hand
Thread Length 1.000 inches minimum
Thread Qty 28
Thread Qty Per Inch (tpi) 28
Thread Series Designator UNRF
Thread Size 1/4
Width Across Flats 0.187 inches minimum and 0.190 inches maximum

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