• Rolled Thread Heavy Hex Screws
  • Top of Head. Top of head shall be full form and chamfered with the diameter of chamfer circle being equal to the maximum width across flats, within a tolerance of minus 15%.
  • Wrenching Height, J. Wrenching height is a distance measured from the bearing surface up the side of the head at the corners. The width across corners shall be within the specified limits for minimum wrenching height.
  • 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 percent.
    Thickness of the washer face shall be not less than 0.015 in. nor greater than 0.025 in. for screw 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. Measurement of washer face diameter shall be taken at a height of 0.004 in. above the bearing surface.
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Nominal Size or Basic Product Dia.

Max. (E)

Basic (F)

Max. (G)

Basic (H)

Min. (J)

N/A Heavy Hex Screw, 1/2" Nominal Dia. N/A 1/2 in N/A 0.5000 in N/A 7/8 in N/A 1.010 in N/A 5/16 in N/A 0.215 in
N/A Heavy Hex Screw, 5/8" Nominal Dia. N/A 5/8 in N/A 0.6250 in N/A 1-1/16 in N/A 1.227 in N/A 25/64 in N/A 0.269 in
N/A Heavy Hex Screw, 3/4" Nominal Dia. N/A 3/4 in N/A 0.7500 in N/A 1-1/4 in N/A 1.443 in N/A 15/32 in N/A 0.324 in
N/A Heavy Hex Screw, 7/8" Nominal Dia. N/A 7/8 in N/A 0.8750 in N/A 1-7/16 in N/A 1.660 in N/A 35/64 in N/A 0.378 in
N/A Heavy Hex Screw, 1" Nominal Dia. N/A 1 in N/A 1.0000 in N/A 1-5/8 in N/A 1.876 in N/A 39/64 in N/A 0.416 in
N/A Heavy Hex Screw, 1-1/8" Nominal Dia. N/A 1-1/8 in N/A 1.1250 in N/A 1-13/16 in N/A 2.093 in N/A 11/16 in N/A 0.461 in
N/A Heavy Hex Screw, 1-1/4" Nominal Dia. N/A 1-1/4 in N/A 1.2500 in N/A 2 in N/A 2.309 in N/A 25/32 in N/A 0.530 in
N/A Heavy Hex Screw, 1-3/8" Nominal Dia. N/A 1-3/8 in N/A 1.3750 in N/A 2-3/16 in N/A 2.526 in N/A 27/32 in N/A 0.569 in
N/A Heavy Hex Screw, 1-1/2" Nominal Dia. N/A 1-1/2 in N/A 1.5000 in N/A 2-3/8 in N/A 2.742 in N/A 15/16 in N/A 0.640 in
N/A Heavy Hex Screw, 1-3/4" Nominal Dia. N/A 1-3/4 in N/A 1.7500 in N/A 2-3/4 in N/A 3.175 in N/A 1-3/32 in N/A 0.748 in
N/A Heavy Hex Screw, 2" Nominal Dia. N/A 2 in N/A 2.0000 in N/A 3-1/8 in N/A 3.608 in N/A 1-7/32 in N/A 0.825 in
N/A Heavy Hex Screw, 2-1/4" Nominal Dia. N/A 2-1/4 in N/A 2.2500 in N/A 3-1/2 in N/A 4.041 in N/A 1-3/8 in N/A 0.933 in
N/A Heavy Hex Screw, 2-1/2" Nominal Dia. N/A 2-1/2 in N/A 2.5000 in N/A 3-7/8 in N/A 4.474 in N/A 1-17/32 in N/A 1.042 in
N/A Heavy Hex Screw, 2-3/4" Nominal Dia. N/A 2-3/4 in N/A 2.7500 in N/A 4-1/4 in N/A 4.907 in N/A 1-11/16 in N/A 1.151 in
N/A Heavy Hex Screw, 3" Nominal Dia. N/A 3 in N/A 3.0000 in N/A 4-5/8 in N/A 5.340 in N/A 1-7/8 in N/A 1.290 in
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