• Unification. Bold type indicates products unified dimensionally with British and Canadian standards. Unification of fine thread nuts is limited to sizes 1 in. and under.
  • Tops and Bearing Surfaces of Nuts. Nuts in sizes 5/8 in. nominal size and smaller shall be double chamfered. Larger size nuts shall be double chamfered or have washer faced bearing surface and chamfered top.
    The diameter of chamfer circle on double chamfered nuts and diameter of washer face shall be within the limits of the
    • more
Unit of Measure
Items
Hex Slotted Nuts

Hex Slotted Nut, 1/4" Nominal Dia.
Hex Slotted Nuts

Hex Slotted Nut, 5/16" Nominal Dia.
Hex Slotted Nuts

Hex Slotted Nut, 3/8" Nominal Dia.
Hex Slotted Nuts

Hex Slotted Nut, 7/16" Nominal Dia.
Hex Slotted Nuts

Hex Slotted Nut, 1/2" Nominal Dia.
Manufacturer N/A Industrial Fasteners Institute
Product N/A Nuts
Codes and Standards N/A ASME/ANSI B18.2.2 1987 (R 1999)
Unit of Measure N/A English
Nominal Size or Basic Major Dia. of Thread N/A 1/4 in N/A 5/16 in N/A 3/8 in N/A 7/16 in N/A 1/2 in
Nominal Size or Basic Major Dia. of Thread (Decimal) N/A 0.2500 in N/A 0.3125 in N/A 0.3750 in N/A 0.4375 in N/A 0.5000 in
Basic Width Across Flats (F) N/A 7/16 in N/A 1/2 in N/A 9/16 in N/A 11/16 in N/A 3/4 in
Max. Width Across Flats (F) N/A 0.438 in N/A 0.500 in N/A 0.562 in N/A 0.688 in N/A 0.750 in
Min. Width Across Flats (F) N/A 0.428 in N/A 0.489 in N/A 0.551 in N/A 0.675 in N/A 0.736 in
Max. Width Across Corners (G) N/A 0.505 in N/A 0.577 in N/A 0.650 in N/A 0.794 in N/A 0.866 in
Min. Width Across Corners (G) N/A 0.488 in N/A 0.557 in N/A 0.628 in N/A 0.768 in N/A 0.840 in
Basic Thickness (H) N/A 7/32 in N/A 17/64 in N/A 21/64 in N/A 3/8 in N/A 7/16 in
Max. Thickness (H) N/A 0.226 in N/A 0.273 in N/A 0.337 in N/A 0.385 in N/A 0.448 in
Min. Thickness (H) N/A 0.212 in N/A 0.258 in N/A 0.320 in N/A 0.365 in N/A 0.427 in
Max. Unslotted Thickness (T) N/A 0.14 in N/A 0.18 in N/A 0.210 in N/A 0.23 in N/A 0.29 in
Min. Unslotted Thickness (T) N/A 0.120 in N/A 0.16 in N/A 0.19 in N/A 0.210 in N/A 0.27 in
Max. Width of Slot (S) N/A 0.100 in N/A 0.12 in N/A 0.15 in N/A 0.15 in N/A 0.18 in
Min. Width of Slot (S) N/A 0.07 in N/A 0.09 in N/A 0.12 in N/A 0.12 in N/A 0.150 in
Max. Runout of Bearing Surface FIM N/A 0.015 in N/A 0.016 in N/A 0.018 in N/A 0.018 in N/A 0.019 in
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