• Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
  • The minimum radius is one half of the value shown.
Unit of Measure

Manufacturer

Manufacturer

N/A Industrial Fasteners Institute

Specifications

Product

N/A Round Head Bolts

Unit of Measure

N/A English

Nominal Size or Basic Bolt Dia.

N/A 1/4 in

Nominal Size or Basic Bolt Dia. (Decimal)

N/A 0.2500 in

Max. Body Dia. (E)

N/A 0.260 in

Min. Body Dia. (E)

N/A 0.237 in

Max. Edge Sharp Head Dia. (A)

N/A 1.008 in

Min. Edge Sharp Head Dia. (A)

N/A 0.969 in

Min. Edge Flat Head Dia. (A)

N/A 0.938 in

Ref. Head Angle (C)

N/A

Max. Flat on Min. Dia. Head (F)

N/A 0.035 in

Max. Head Height (H)

N/A 0.098 in

Min. Head Height (H)

N/A 0.078 in

Max. Square Width (O)

N/A 0.280 in

Min. Square Width (O)

N/A 0.245 in

Max. Square Depth (P)

N/A 0.219 in

Min. Square Depth (P)

N/A 0.188 in

Max. Corner Radius on Square (Q)

N/A 0.031 in

Max. Fillet Radius (R)

N/A 0.031 in

Codes and Standards

Codes and Standards

N/A ASME B18.5 1990 (R1998)
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