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NAS1351-4-20P

Socket Head Cap Screw

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Description

Length: 1-1/4", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1", NAS1351 series screw

Specifications

Drive Style Hexagon
Fastener Length Between 1.210 inches and 1.250 inches
Hardness Rating 38.0 rockwell c and 45.0 rockwell c
Head Diameter Between 0.365 inches and 0.375 inches
Head Height Between 0.244 inches and 0.250 inches
Head Style Flat chamfer
Internal Drive Style Hexagon
Length 1 1/4
Material Steel
Min. Tensile Strength (psi) 180000 pounds per square inch
Minimum Yield Strength 155000 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 federal specification single treatment response
Thread Class 3a
Thread Diameter 0.250
Thread Direction Right-hand
Thread Length 1.00
Thread Qty 28
Thread Qty Per Inch (tpi) 28
Thread Series UNRF
Thread Series Designator UNRF
Thread Size 1/4
Width Across Flats Between 0.188 inches and 0.190 inches

Other sizes

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