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Sales Systems Limited Products and Services > Fasteners > Nuts > Machine Screw Nuts > Hex Machine Screw Nuts > Item # HMSN01900XXX  
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Item # HMSN01900XXX, Hex Machine Screw Nut, with 0.433" Width Across Corner

  • 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.

Manufacturer  · Specifications  · Codes and Standards



Industrial Fasteners Institute



Machine Screw Nuts

Unit of Measure


Nominal Size or Basic Thread Dia.

No. 10

Nominal Size or Basic Thread Dia. (Decimal)

0.1900 in

Basic Width Across Flats (F)

3/8 in

Max. Width Across Flats (F)

0.375 in

Min. Width Across Flats (F)

0.362 in

Max. Width Across Corners (G1)

0.433 in

Min. Width Across Corners (G1)

0.413 in

Max. Thickness (H)

0.130 in

Min. Thickness (H)

0.117 in

Codes and Standards

Codes and Standards

ANSI/ASME B18.6.3 1998

Distributor of Industry Standard and Military Specification Threaded Fasteners