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NAS1351C4-18

Socket Head Cap Screw

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Description

Fastener Length: 1-1/8", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1

Specifications

Fastener Length 1.085 inches minimum and 1.125 inches maximum
Hardness Rating 80.0 rockwell b minimum
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 1/8
Material CRES
Min. Tensile Strength (psi) 80000 pounds per square inch
Minimum Yield Strength 30000 pounds per square inch
Specification Data 80205-nas1351 professional/industrial association standard
Surface Treatment Passivate
Surface Treatment Specification Qq-p-35 fed spec single treatment response
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