Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
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. Head Dia. (A)

N/A 0.682 in

Min. Head Dia. (A)

N/A 0.625 in

Min. Flat on Head (F)

N/A 0.018 in

Max. Head Height (H)

N/A 0.154 in

Min. Head Height (H)

N/A 0.135 in

Max. Square Width (O)

N/A 0.260 in

Min. Square Width (O)

N/A 0.245 in

Max. Square Depth (P)

N/A 0.156 in

Min. Square Depth (P)

N/A 0.125 in

Max. Corner Radius on Square (Q)

N/A 0.031 in

Codes and Standards

Codes and Standards

N/A ASME B18.5 1990 (R1998)
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