Sales Systems, Limited
Sales Systems, Limited
700 Florida Avenue
Portsmouth, Virginia 23707
Toll Free: 800.368.3711
Phone: 757.397.0763
Fax Sales: 757.393.3669
Email: info@salessystemsltd.com
Website: www.salessystemsltd.com
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  • Top of Head. Top of head shall be full form and chamfered or rounded with the diameter of chamfer circle or start of rounding being equal to the maximum width across flats within a tolerance of minus 15%.
  • Head Taper. Maximum width across flats shall not be exceeded. No transverse section through the head between 25% and 75% of actual head height, as measured from the bearing surface, shall be less than the minimum width across flats.
  • Bearing Surface. Bearing surface shall be flat and washer faced. Diameter of washer face shall be equal to the maximum width across flats within a tolerance of minus 10%. Thickness of the washer face shall be not less than 0.015 in. nor greater than 0.025 in. for bolt sizes 3/4 in. and smaller; and not less than 0.015 in. nor greater than 0.035 in. for sizes larger than 3/4 in.
    The plane of the bearing surface shall be perpendicular to the axis of the body within the FIM limits specified for total runout. Measurement of FIM shall extend as close to the periphery of the bearing surface as possible while the bolt is being held in a collet or other gripping device at a distance of one bolt diameter from the underside of the head.
  • True Position of Head. The axis of the head shall be located at true position with respect to the axis of the body (determined over a distance under the head equal to one diameter) within a tolerance zone having a diameter equivalent to 6% of the maximum width across flats at maximum material condition.
  • Body Diameter. Any swell or fin under the head or any die seam on the body shall not exceed the basic bolt diameter.
Unit of Measure

Manufacturer

Manufacturer

 N/A Industrial Fasteners Institute

Specifications

Product

 N/A Structural Bolting

Unit of Measure

 N/A English

Nominal Size or Basic Product Diameter

 N/A 1/2 in

Nominal Size or Basic Product Diameter (Decimal)

 N/A 0.5000 in

Max. Body Diameter (E)

 N/A 0.515 in

Min. Body Diameter (E)

 N/A 0.482 in

Nominal Width Across Flats (F)

 N/A 7/8 in

Max. Width Across Flats (F)

 N/A 0.875 in

Min. Width Across Flats (F)

 N/A 0.850 in

Max. Width Across Corners (G)

 N/A 1.010 in

Min. Width Across Corners (G)

 N/A 0.969 in

Nominal Head Height (H)

 N/A 5/16 in

Max. Head Height (H)

 N/A 0.323 in

Min. Head Height (H)

 N/A 0.302 in

Max. Radius of Fillet (R)

 N/A 0.031 in

Min. Radius of Fillet (R)

 N/A 0.009 in

Codes and Standards

Codes and Standards

 N/A ASME Draft Revision B18.2.6 2003

Thread Length

Ref. Thread Length (LT)

 N/A 1.00 in

Transition Thread Length

Ref. Transition Thread Length (Y)

 N/A 0.19 in

Runout of Bearing Face, FIM

Max. Total Runout of Bearing Surface FIM

 N/A 0.016 in