Item # HMSN01640XXX, Hex Machine Screw Nut, with 0.397" Width Across Corner On Sales Systems Ltd.

Hexagon machine screw nuts shall have tops flat with chamfered corners. Diameter of top circle shall be equal to the maximum width across flats within a tolerance of minus 15 percent. The bearing surface shall be perpendicular to the axis of the threaded hole pitch cylinder within a tolerance of 4 deg.
Bottoms of hexagon machine screw nuts are normally flat, but for special purposes may be chamfered, if so specified by purchaser.
Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.

Unit of Measure

Manufacturer | Specifications | Codes and Standards

N/A Industrial Fasteners Institute

Product	N/A Machine Screw Nuts
Unit of Measure	N/A English
Nominal Size or Basic Thread Dia.	N/A No. 8
Nominal Size or Basic Thread Dia. (Decimal)	N/A 0.1640 in
Basic Width Across Flats (F)	N/A 11/32 in
Max. Width Across Flats (F)	N/A 0.344 in
Min. Width Across Flats (F)	N/A 0.332 in
Max. Width Across Corners (G₁)	N/A 0.397 in
Min. Width Across Corners (G₁)	N/A 0.378 in
Max. Thickness (H)	N/A 0.130 in
Min. Thickness (H)	N/A 0.117 in

N/A ANSI/ASME B18.6.3 1998

Manufacturer