Abstract： ASME B18.16.4:2008 pdf download.Serrated Hex Flange Locknuts 90,000 psi (Inch Series). 5 DIMENSIONS (a) Unless otherwise specified, all dimensions in this Standard shall be as specified in Tables I and 2. and sections 6 through 9. All dimen...

ASME B18.16.4:2008 pdf download.Serrated Hex Flange Locknuts 90,000 psi (Inch Series).

5 DIMENSIONS

(a) Unless otherwise specified, all dimensions in this Standard shall be as specified in Tables I and 2. and sections 6 through 9. All dimensions in this Standard are in inches and appi’, before plating or coating is specified. When a plating Or coating is

specified. the finished product dimensions shall be agreed upon between the supplier and purchaser.

(b) Symbols specifying geometric characteristics are in accordance with ASME Y14.5M.

6 SERRAT1ONS

The configuration of the serrations shall be at the discretion of the manufacturer. provided the performance requirements as

specified in para. 12.2 are met.

7 TOPS OF NUTS

Tops of nuts shall be flat and chamfered The length of chamlcr at hex corners shall be from 5% to 15% of the basic thread size. The surface may be slightly convex or rounded.

8 TRUE POSITiON OF HEXAGON TO TAPPED HOLE

At maximum material condition (MMC). the axis of the hexagon shall be located at true posit Ion with respect to the axis of the

thread pitch diameter within a tolerance zone having a diameter equivalent to 4 of the maximum width across flats.

9 COUNTERSINK

Tapped hole shall be countersunk on the bearing face and may be countersunk on the top. The maximum countersink diameter shall be

the thread basic (nominal) major diameter plus 0.030 in. for in. nominal size nuts and smaller.

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