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NAS1297-4-11

Bolt

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Description

Fastener Length: 1-11/64", Thread: 1/4-28, Thread Length: 15/32"

Specifications

Fastener Length 1.141 inches minimum and 1.181 inches maximum
Hardness Rating 26.0 rockwell c minimum and 32.0 rockwell c maximum
Head Height 0.172 inches minimum and 0.204 inches maximum
Head Style Hexagon Head
Length 1 11/64
Material Steel
Material Specification Mil-s-6049 mil spec 1st material response or mil-s-6050 mil spec 2nd material response or mil-s-6098 mil spec 3rd material response or mil-s-5626 mil spec 4th material response or mil-s-6758 mil spec 5th material response or ams 6300 assn std 6th material response
Min. Tensile Strength (psi) 125000 pounds per square inch
Shoulder Diameter 0.3090 inches minimum first shoulder and 0.3120 inches maximum first shoulder
Shoulder Length 0.698 inches minimum first shoulder and 0.718 inches maximum first shoulder
Shoulder Shape Round first shoulder
Surface Treatment Cadmium and chromate
Surface Treatment Specification Qq-p-416,ty 2 cl 3 fed spec single treatment response
Thread Class 3a
Thread Diameter 0.250
Thread Direction Right-hand
Thread Length 0.423 inches minimum and 0.483 inches maximum
Thread Qty 28
Thread Qty Per Inch (tpi) 28
Thread Series Designator UNJF
Thread Size 1/4
Width Between Flats 0.490 inches minimum and 0.502 inches maximum

Other sizes

Parts that share this base number, ordered by size. Always verify the full specification before substituting.

Cross-reference

Similar parts

Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.

  • NAS1297-4-12 NAS 1/4-28 · 0.073 in · Hexagon Head · Steel

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