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AN107420

Aeronautical Standard Machine Bolt

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Description

Fastener Length: 1-3/8", Hole Diameter: 5/64", Thread: 1/4-28, Thread Length: 3/4

Specifications

Fastener Length 1.375
Features Provided Finished head
Grip Length 0.625
Head Height 0.250
Head Style Hexagon Head
Hole Configuration Style Hexagon flats
Hole Diameter 0.070
Hole Quantity 6
Hole Type Drilled
Length 1 3/8
Material Steel
Surface Finish 32.0 microinches threads, 63.0 microinches bearing surface of head, 63.0 microinches grip
Surface Treatment Passivate
Thread Class 3a
Thread Diameter 0.250
Thread Direction Right-hand
Thread Length 0.750 inches minimum
Thread Qty 28
Thread Qty Per Inch (tpi) 28
Thread Series Designator UNF
Thread Size 1/4
Width Between Flats 0.430 inches minimum and 0.439 inches maximum

Cross-reference

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