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Heavy Hex Nuts for Use with Structural Bolts

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  • Unification. Only the 9/16 size is not unified dimensionally with British and Canadian standards.
  • Tops and Bearing Surfaces of Nuts. Nuts may be double chamfered or have washer faced bearing surface and chamfered top.
    The of chamfer circle on double chamfered nuts and diameter of washer face shall be within the limits of the maximum width across flats and 95% of the minimum width across flats.
    The tops of washer faced nuts shall be flat and the diameter of chamfer circle shall be equal to the maximum width across flats within a tolerance of -15%. The length of chamfer at hex corners shall be 5% to 15% of the basic thread diameter. The surface of chamfer may be slightly convex or rounded.
    Bearing surfaces shall be flat and, unless otherwise specified, shall be perpendicular to the axis of the threaded hole within the total run out (FIM) tabulated for the respective nut size, type, and strength level.
  • Position of Hexagon to Tapped Hole. At maximum material condition, the axis of nut body shall be located at true position with respect to the axis of the tapped hole within a tolerance zone having a diameter equivalent to 4% of the maximum width across flats for 1-1/2" nominal size nuts or smaller.
  • Countersink. Tapped hole shall be countersunk on the bearing face or faces. The maximum countersink diameter shall be 1.08 times the thread basic (nominal) major diameter. No part of the threaded portion shall project beyond the bearing surface.
  • Corner Fill. A rounding or lack of fill at junction of hex corners with chamfer shall be permissible provided the width across corners is within specified limits at and beyond a distance equal to 17.5% of the basic thread diameter from the chamfered faces.
  • Width Across Flats. Maximum width across flats shall not be exceeded.




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Item #

Description

Nominal Size or Basic Major Diameter of Thread

Nominal (F)

Max. (F)

Max. (G)

Nominal (H)

Max. (H)

HHNSB05000XXX Heavy Hex Nut for Use with Structural Bolts, with 7/8" Width Across Flat 1/2 in 7/8 in 0.875 in 1.010 in 31/64 in 0.504 in
HHNSB06250XXX Heavy Hex Nut for Use with Structural Bolts, with 1-1/16" Width Across Flat 5/8 in 1-1/16 in 1.062 in 1.227 in 39/64 in 0.631 in
HHNSB07500XXX Heavy Hex Nut for Use with Structural Bolts, with 1-1/4" Width Across Flat 3/4 in 1-1/4 in 1.250 in 1.443 in 47/64 in 0.758 in
HHNSB08750XXX Heavy Hex Nut for Use with Structural Bolts, with 1-7/16" Width Across Flat 7/8 in 1-7/16 in 1.438 in 1.660 in 55/64 in 0.885 in
HHNSB10000XXX Heavy Hex Nut for Use with Structural Bolts, with 1-5/8" Width Across Flat 1 in 1-5/8 in 1.625 in 1.876 in 63/64 in 1.012 in
HHNSB11250XXX Heavy Hex Nut for Use with Structural Bolts, with 1-13/16" Width Across Flat 1-1/8 in 1-13/16 in 1.812 in 2.093 in 1-7/64 in 1.139 in
HHNSB12500XXX Heavy Hex Nut for Use with Structural Bolts, with 2" Width Across Flat 1-1/4 in 2 in 2.000 in 2.309 in 1-7/32 in 1.215 in
HHNSB13750XXX Heavy Hex Nut for Use with Structural Bolts, with 2-3/16" Width Across Flat 1-3/8 in 2-3/16 in 2.188 in 2.526 in 1-11/32 in 1.378 in
HHNSB15000XXX Heavy Hex Nut for Use with Structural Bolts, with 2-3/8" Width Across Flat 1-1/2 in 2-3/8 in 2.375 in 2.742 in 1-15/32 in 1.505 in
  Results 1 - 9 of 9 1 
Distributor of Industry Standard and Military Specification Threaded Fasteners