• Square machine screw nuts shall have tops and bottoms flat, without chamfer. The bearing surface shall be perpendicular to the axis of the threaded hole pitch cylinder within a tolerance of 4 deg.
  • Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
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Unit of Measure
Items
Square and Hex Machine Screw Nuts

Square Machine Screw Nut, with 0.221" Width Across Corner
Square and Hex Machine Screw Nuts

Square Machine Screw Nut, with 0.221" Width Across Corner
Square and Hex Machine Screw Nuts

Square Machine Screw Nut, with 0.265" Width Across Corner
Square and Hex Machine Screw Nuts

Square Machine Screw Nut, with 0.265" Width Across Corner
Square and Hex Machine Screw Nuts

Square Machine Screw Nut, with 0.354" Width Across Corner
Manufacturer N/A Industrial Fasteners Institute
Product N/A Machine Screw Nuts
Codes and Standards N/A ANSI/ASME B18.6.3 1998
Unit of Measure N/A English
Nominal Size or Basic Thread Dia. N/A No. 0 N/A No. 1 N/A No. 2 N/A No. 3 N/A No. 4
Nominal Size or Basic Thread Dia. (Decimal) N/A 0.0600 in N/A 0.0730 in N/A 0.0860 in N/A 0.0990 in N/A 0.1120 in
Basic Width Across Flats (F) N/A 5/32 in N/A 5/32 in N/A 3/16 in N/A 3/16 in N/A 1/4 in
Max. Width Across Flats (F) N/A 0.156 in N/A 0.156 in N/A 0.188 in N/A 0.188 in N/A 0.250 in
Min. Width Across Flats (F) N/A 0.150 in N/A 0.150 in N/A 0.180 in N/A 0.180 in N/A 0.241 in
Max. Width Across Corners (G) N/A 0.221 in N/A 0.221 in N/A 0.265 in N/A 0.265 in N/A 0.354 in
Min. Width Across Corners (G) N/A 0.206 in N/A 0.206 in N/A 0.247 in N/A 0.247 in N/A 0.331 in
Max. Thickness (H) N/A 0.050 in N/A 0.050 in N/A 0.066 in N/A 0.066 in N/A 0.098 in
Min. Thickness (H) N/A 0.043 in N/A 0.043 in N/A 0.057 in N/A 0.057 in N/A 0.087 in
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