• Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
  • Flat on minimum diameter head calculated on minimum sharp and absolute minimum head diameters and 82 deg head angle.
  • Head shall be unslotted, unless otherwise specified. Slot dimensions are same as Slotted Flat Countersunk Head Cap Screws in American National Standard, ASME B18.6.2.
  • Maximum head height calculated on maximum sharp head diameter, basic bolt diameter and 78 deg head angle.
  • Minimum head height calculated on minimum sharp head diameter, basic bolt diameter and 82 deg head angle.
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 1/2 in

Nominal Size or Basic Bolt Dia. (Decimal)

N/A 0.5000 in

Max. Body Dia. (E)

N/A 0.515 in

Min. Body Dia. (E)

N/A 0.483 in

Max. Edge Sharp Head Dia. (A)

N/A 0.935 in

Min. Edge Sharp Head Dia. (A)

N/A 0.905 in

Absolute Min. Edge Rounded or Flat Head Dia. (A)

N/A 0.845 in

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

N/A 0.035 in

Max. Head Height (H)

N/A 0.269 in

Min. Head Height (H)

N/A 0.233 in

Max. Slot Width (J)

N/A 0.106 in

Min. Slot Width (J)

N/A 0.091 in

Max. Slot Depth (T)

N/A 0.103 in

Min. Slot Depth (T)

N/A 0.068 in

Codes and Standards

Codes and Standards

N/A ASME B18.5 1990 (R1998)
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