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Heavy Hex Structural Bolts

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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.

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Item #


Nominal Size or Basic Product Diameter

Max. (E)

Nominal (F)

Max. (G)

Nominal (H)

Max. (R)

HHSB05000XXX Heavy Hex Structural Bolt, 1/2" Nominal Dia. 1/2 in 0.515 in 7/8 in 1.010 in 5/16 in 0.031 in
HHSB06250XXX Heavy Hex Structural Bolt, 5/8" Nominal Dia. 5/8 in 0.642 in 1-1/16 in 1.227 in 25/64 in 0.062 in
HHSB07500XXX Heavy Hex Structural Bolt, 3/4" Nominal Dia. 3/4 in 0.768 in 1-1/4 in 1.443 in 15/32 in 0.062 in
HHSB08750XXX Heavy Hex Structural Bolt, 7/8" Nominal Dia. 7/8 in 0.895 in 1-7/16 in 1.660 in 35/64 in 0.062 in
HHSB10000XXX Heavy Hex Structural Bolt, 1" Nominal Dia. 1 in 1.022 in 1-5/8 in 1.876 in 39/64 in 0.093 in
HHSB11250XXX Heavy Hex Structural Bolt, 1-1/8" Nominal Dia. 1-1/8 in 1.149 in 1-13/16 in 2.093 in 11/16 in 0.093 in
HHSB12500XXX Heavy Hex Structural Bolt, 1-1/4" Nominal Dia. 1-1/4 in 1.277 in 2 in 2.309 in 25/32 in 0.093 in
HHSB13750XXX Heavy Hex Structural Bolt, 1-3/8" Nominal Dia. 1-3/8 in 1.404 in 2-3/16 in 2.526 in 27/32 in 0.093 in
HHSB15000XXX Heavy Hex Structural Bolt, 1-1/2" Nominal Dia. 1-1/2 in 1.531 in 2-3/8 in 2.742 in 15/16 in 0.093 in
  Results 1 - 9 of 9 1 
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