ASME B18-16.4 pdf download

ASME B18-16.4 pdf download Serrated Hex Flange Locknuts 90,000 psi (Inch Series)
SCOPE
This Standard covers the general, dimensional, andmechanical performance requirements for low strengthcarbon steel, case hardened, regular and large serratedflange locknuts (inch series), recognized as AmericanNational Standard.
2 COMPARISON TO ISO STANDARDS
There is no inch series ISO standard for these productsat this time.
3 TERMINOLOGY
For definitions of terms relating to fasteners orcomponent features used in this Standard, refer toASME B18.12.
4 REFERENCE STANDARDS
The following is a list of publications referenced inthis Standard.
ASME B1.1. Unified Inch Screw ThreadsASME B1.3, Screw and Thread Gaging Systems forDimensional Acceptability — Inch and Metric ScrewThreads(UN,UNR, UNJ, M, and M))ASME B18.12，Glossary of Terms for Mechanical
FastenersASME B18.18.2M,nspection and Quality Assurance forHigh-Volume Machine Assembly FastenersASMEY145M, Dimensioning and TolerancingPublisher: The American Society Of MechanicalEngineers (ASME)，Three Park Avenue,New YorkNY10016-5990; Order Department: 22 Law Drive,POBox 2300,Fairfield,NJ 07007-2300
ASTM F 606，Test Methods for Determining theMechanical Properties of Externally and InternallyThreaded Fasteners，Washers,Direct TensionIndicators,and RivetsASTM F812，Specification for Surface Discontinuitiesof Nuts, Inch SeriesASTM F 1941, Electrodeposited Coatings on ThreadedFasteners[Unified Inch Screw Threads (UN/UNR)ASTM F 2282,Standard Specification for QualityAssurance Requirements for Carbon and Alloy SteelWire, Rods, and Bars for Mechanical Fasteners
ASTM F 2328Standard Test Method for DeterminingDecarburization and Carburization in Hardened andTempered Threaded Steel Bolts, Screws, and StudsPublisher: ASTM International,100 Barr Harbor DrivePO.Box C700,West ConshohockenPA 19428-2959
5 DIMENSIONS
(a) Unless otherwise specified, all dimensions in thisStandard shall be as specified in Tables 1 and 2, andsections 6 through 9. All dimensions in this Standardare in inches and apply before plating or coating isspecified.When a plating or coating is specified,thefinished product dimensions shall be agreed uponbetween the supplier and purchaser.
(b) Symbols specifying geometric characteristics arein accordance with ASME Y145M.
6 SERRATIONS
The configuration of the serrations shall be at thediscretion 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 lengthof chamfer at hex corners shall be from 5% to 15% ofthe basic thread size. The surface may be slightly convexor rounded.
8 TRUE POSITION OF HEXAGON TO TAPPED HOLE
At maximum material condition (MMC), the axis ofthe hexagon shall be located at true position with respectto the axis of the thread pitch diameter within a tolerancezone having a diameter equivalent to 4% of the maximum width across flats.
9 COUNTERSINK
Tapped hole shall be countersunk on the bearing faceand may be countersunk on the top. The maximumcountersink diameter shall be the thread basic (nominalmajor diameter plus 0.030 in. for % in nominal size nutsand smaller, and 1.08 times the basic major diameter for