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NAS1297-4-6

Shoulder Bolt

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Description

Fastener Length: 55/64", Hole Diameter: 1/16", Thread: 1/4-28, Thread Length: 15/32", NAS1297 series bolt

Specifications

Fastener Length 0.828 inches minimum and 0.868 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
Hole Configuration Style Hexagon flats
Hole Diameter 0.070
Hole Quantity 1
Hole Type Drilled
Length 55/64
Material Steel
Material Specification Mil-s-5626 mil spec 1st material response or mil-s-6049 mil spec 2nd material response or mil-s-6050 mil spec 3rd material response or mil-s-6098 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 0.309 inches minimum first shoulder and 0.312 inches maximum first shoulder
Shoulder Length 0.385 inches minimum first shoulder and 0.395 inches maximum first shoulder
Shoulder Shape Round first shoulder
Specification Data 80205-nas1297 professional/industrial association standard
Surface Treatment Cadmium and chromate
Surface Treatment Specification Qq-p-416,t6 2 cl 3 fed spec single treatment response
Thread Class 3a
Thread Diameter 0.250
Thread Direction Right-hand
Thread Length 0.433 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

No interchangeable or dimensionally similar parts are on record for NAS1297-4-6. Try the cross-reference lookup to search by a different part number.

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