Item # HCS30000XXX, Hex Cap Screw, 3" Nominal Dia. On Sales Systems Ltd.

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 percent.
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 specified limits for the full wrenching height.
Bearing Surface. Bearing surface shall be flat and washer

Unit of Measure

Manufacturer | Specifications | Codes and Standards | Thread Length for Screw Lengths

N/A Industrial Fasteners Institute

Product	N/A Square and Hex Bolts and Screws
Unit of Measure	N/A English
Nominal Size or Basic Product Diameter	N/A 3 in
Nominal Size or Basic Product Diameter (Decimal)	N/A 3.0000 in
Max. Body Diameter (E)	N/A 3.0000 in
Min. Body Diameter (E)	N/A 2.9880 in
Basic Width Across Flats (F)	N/A 4-1/2 in
Max. Width Across Flats (F)	N/A 4.500 in
Min. Width Across Flats (F)	N/A 4.350 in
Max. Width Across Corners (G)	N/A 5.196 in
Min. Width Across Corners (G)	N/A 4.959 in
Basic Head Height (H)	N/A 1-7/8 in
Max. Head Height (H)	N/A 1.935 in
Min. Head Height (H)	N/A 1.815 in
Min. Wrenching Height (J)	N/A 1.290 in
Max. Transition Thread Length (Y)	N/A 1.250 in
Max. Circular Runout of Bearing Surface FIM	N/A 0.079 in

N/A ASME B18.2.1 1996

Nom. L_T for Screw Length (Over 6 in.)

N/A 6.500 in