ASME B18-16.6:2008 pdf free download Nylon Insert Locknuts (Inch Series)
1 INTRODUCTION
1.1 Scope
This Standard covers the complete general,dimen-sional, mechanical,and performance data for carbonsteel, inch series nylon insert locknuts of property gradesNE2，NE5,and NE8 designated as American NationalStandard.
The inclusion of dimensional data in this Standard isnot intended to imply that all of the locknut sizes inconjunction with the various options described hereinare stock items.Consumers should consult with suppli-
ers concerning lists of stock production nylon insertlocknuts.
1.2 Comparison to lso Standards
There is no ISO inch standard for these products atthis time.
2REFERENCE STANDARDS
The following is a list of publications referenced inthis Standard. Unless otherwise specified, the referencestandard(s) shall be the most recent issue at the time oforder placement.
ASME B1.1,Unified Inch Screw Threads
ASME B1.3,Screw and Thread Gaging Systems forDimensional Acceptability-Inch and Metric ScrewThreads (UN,UNR,UNJ, M, and MJ)
ASME B18.2.1,Square and Hex Bolts and Screws (InchSeries)
ASME B18.12,Glossary of Terms for MechanicalFasteners
ASME B18.18.1,Inspection and Quality Assurance forGeneral Purpose Fasteners
ASME B18.18.2M, Inspection and Quality Assurance forHigh-Volume Machine Assembly Fasteners
ASME B18.22.1,Plain Washers
Publisher: The American Society of MechanicalEngineers (ASME)，Three Park Avenue,New York,NY 10016-5990; Order Department: 22 Law Drive,P.O.Box 2300,Fairfield, NJ 07007-2300
ASTM B 117,Standard Practice for Operating Salt Spray(Fog)Apparatus
ASTM E 18,Test Methods for Rockwell Hardness andRockwell Superficial Hardness of Metallic Materials
ASTM F 436, Hardened Steel Washers
ASTM F 812,Surface Discontinuities of Nuts (InchSeries)
ASTM F1941,Electrodeposited Coatings on ThreadedFasteners [Unified Inch Screw Threads (UN/UNR)]Publisher: American Society for Testing and Materials(ASTM International), 100 Barr Harbor Drive,P.O. BoxC700,West Conshohocken, PA 19428-2959
SAE J121,Decarburization in Hardened and TemperedUnified Threaded Fasteners
SAE J409,Product Analysis — Permissible Variationsfrom Specified Chemical Analysis of a Heat or Castof Steei
Publisher: Society of Automotive Engineers (SAE),400Commonwealth Drive, Warrendale, PA 15096-0001
3TERMINOLOGY
For definitions of other terms relating to fasteners orcomponent features thereof used in this Standard, referto ASME B18.12.
4DIMENSIONS
Unless otherwise specified, all dimensions in thisStandard are inches and shall be as specified in Table 1and sections 6 through 9.All dimensions apply beforeplating or coating is specified. When plating or coatingis specified, the finished product dimensions shall beagreed upon between the supplier and purchaser.
5 NUT DESIGNS AND PROPERTY GRADES
This Standard covers top insert, two-piece construc-tion nuts that derive their prevailing-torque characteris-tics from an insert,usually a full ring of nonmetallicmaterial, located and retained in the nut at its top sur-face. These are designated as property grade NE2,NE5,and NE8 meeting the mechanical and performancerequirements of Table 2 or 3.
6WIDTH ACROSS FLATS
The width across flats shall be the distance measuredperpendicular to the axis of the nut between two oppo-site wrenching flats.
7 CORNER FILL A rounding or lack of fill at the junction ofhex corners with the chamfer shall be permissible, provided the width across corners is within specified limits at and beyond a distance equal to 17.5% of the nominal thread diameter from the chamfered face.
8 HEIGHT The locknut height shall be the overall distance, mea- sured parallel to the axis of the locknut, from the top of the locknut to the bearing surface.
9 HEX HEIGHT The hex height is the distance, measured at a corner of the hex, from the bearing surface. 10 THREADS Threads shall be unified coarse or fine thread series (UNC or UNF series Class 2B) in accordance with ASME B1.1. Inspection shall be based on System 21 of ASME B1.3.
ASME B18-16.6:2008 pdf free download
