ASME B18.16.4:2008 pdf free download

ASME B18.16.4:2008 pdf free download.Serrated Hex Flange Locknuts 90,000 psi.
ASTM F 2328, Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, and Studs
Publisher: ASTM International, 1(X) l3arr Harbor Drive, P0, Box C700, West Conshohocken, PA 19428-2959
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 apply 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 SERRATIONS
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 chamfer 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 01 the hexagon shall be located at true position 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 34 in. nominal size nuts and smaller, and 1.08 times the basic major diameter for nuts larger than % in. No part of the threaded portionshall project beyond the bearing surface.
10THREADS
Threads shall be Unified coarse or fine thread series(UNC or UNF series)Class 2B, in accordance withASME B1.1.
Inspection shall be based on System 21 of ASME B1.3.
11 MATERIAL AND HARDNESS
Unless otherwise specified,nuts shall be manufac-tured from carbon steel in accordance with ASTMF 2282.The nuts shall have a case hardness of HR 15N 78-90on the surface of the nut in accordance withASTM F 2328. For referee purposes, case hardness shallbe measured in the serrations.