Abstract： ASME B18.16.6:2017 pdf download.Prevailing Torque Locknuts(Inch Series). All-metal locknuts are one-piece construction hex and hex flange nuts that derive their prevailing torque performance from controlled distortion of the nut threads and...

ASME B18.16.6:2017 pdf download.Prevailing Torque Locknuts(Inch Series).

All-metal locknuts are one-piece construction hex and hex flange nuts that derive their prevailing torque performance from

controlled distortion of the nut threads and/or body. Hex locknuts are designated as grades A. B, and C. The dimensions are

located in Table 10. Hex flange lLwknuts are designated as grades F and 6. The dimensionsare in Table II Table 1 identifies the

material requirements for the various grades, arid Table 2 identities sizes and hardness requirements for the various grades.

6 CORNER FILL

A rounding or lack of fill at the locathm where the hex corners intersect with the chamfer shall he permissible. provided the width across corners is within specified limits in the area extending from a distance equal to 17.5% of the basic thread diameter from

the chamfered hearing face to 85% of the specified minimum hex height.

7 CHAMFERS AND BEARING CIRCLES

7.1 Chamfer Length on Bearing Side ot Nuts

The length of chamfer at hex corners shall be from 5% to 15s. of the nominal thread diameter. The surface of the chamfer may be

convex or rounded.

7,2 Bearing Swface Diameter

The diameter of bearing elide on chamfered nuts and washer-faced nuts shall be within the limits of the maximum width acris flats

and 95% of the minimum width across flats,

8 COUNTERSINKS

Unless otherwise speed led in this Standard, tapped holes shall be countersunk on the bearing faces The maximum countersink

diameter shall be the nominal thread diameter plus 0.030 in. for 3 in. nominal size nuts and smaller, and 1.08 times the nominal

thread diameter for nuts larger than in. no part of the threaded portion shall project beyond the bearing surface.

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