1、Nylon Insert Locknuts(Inch Series)AN AMERICAN NATIONAL STANDARDASME B18.16.6-2008Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18.16.6-2008Nylon InsertLocknuts(Inch Series)AN AMERICAN NATI
2、ONAL STANDARDCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance: November 24, 2008This Standard will be revised when the Society approves the issuance of a new edition. There willbe
3、no addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the ASME B18 Committee may be published as Cases.Cases and interpretations are published on the ASME Web site under the Committe
4、e Pages athttp:/cstools.asme.org as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards. The Standards Committee that approved the code
5、or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an opportunity for additional public input from industry, academia,regulatory
6、agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document, and does not unde
7、rtake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights, and the risk of infringement of such rights,
8、isentirely their own responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in acc
9、ordance with the establishedASME procedures and policies, which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of
10、 Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2008 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license f
11、rom IHS-,-,-CONTENTSForeword ivCommittee Roster . vCorrespondence With the B18 Committee vi1 Introduction . 12 Reference Standards . 13 Terminology . 14 Dimensions 15 Nut Designs and Property Grades . 16 Width Across Flats . 17 Corner Fill . 28 Height 29 Hex Height 210 Threads . 211 Material, Mechan
12、ical, and Performance Properties . 412 Test Methods 413 Grade and Manufacturing Marking 614 Inspection and Quality Assurance. 615 Dimensional Conformance 616 Designation . 617 Workmanship 6Tables1 Nut Dimensions 22 Proof Loads, Clamp Loads, and Prevailing-Torques for Coarse Thread SeriesGrades NE2,
13、NE5, and NE8 Nuts . 33 Proof Loads, Clamp Loads, and Prevailing-Torques for Fine Thread SeriesGrades NE2, NE5, and NE8 Nuts . 34 Chemical Composition Requirements . 45 Hardness Requirements . 4iiiCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or ne
14、tworking permitted without license from IHS-,-,-FOREWORDASME B18.16.6-2008 was balloted and approved by the B18 Standards Committee and B18Subcommittee 16 on April 29, 2008. The proposal was submitted to the American NationalStandards Institute and designated as an American National Standard on Augu
15、st 25, 2008.ivCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18 COMMITTEEStandardization of Bolts, Nuts, Rivets, Screws,Washers, and Similar Fasteners(The following is the roster of the Com
16、mittee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSD. A. Clever, ChairR. D. Strong, Vice ChairR. L. Crane, Staff SecretarySTANDARDS COMMITTEE PERSONNELV. Cartina, Continental-AeroD. A. Clever, Deere however, they shouldnot contain proprietary names or information.Requests t
17、hat are not in this format may be rewritten in the appropriate format by the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an int
18、erpretation is available. Further, persons aggrieved by aninterpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The B18 Standards Committ
19、ee regularly holds meetings, whichare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B18 Standards Committee.viCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from
20、 IHS-,-,-ASME B18.16.6-2008NYLON INSERT LOCKNUTS(INCH SERIES)1 INTRODUCTION1.1 ScopeThis 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
21、.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 ISO S
22、tandardsThere is no ISO inch standard for these products atthis time.2 REFERENCE STANDARDSThe 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 Scre
23、w ThreadsASME B1.3, Screw and Thread Gaging Systems forDimensional AcceptabilityInch 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 MechanicalFastenersASME B18.18.1, Inspection and Quality Assurance forGen
24、eral Purpose FastenersASME B18.18.2M, Inspection and Quality Assurance forHigh-Volume Machine Assembly FastenersASME B18.22.1, Plain WashersPublisher: The American Society of MechanicalEngineers (ASME), Three Park Avenue, New York,NY 10016-5990; Order Department: 22 Law Drive, P.O.Box 2300, Fairfiel
25、d, NJ 07007-2300ASTM B 117, Standard Practice for Operating Salt Spray(Fog) ApparatusASTM E 18, Test Methods for Rockwell Hardness andRockwell Superficial Hardness of Metallic Materials1ASTM F 436, Hardened Steel WashersASTM F 812, Surface Discontinuities of Nuts (InchSeries)ASTM F 1941, Electrodepo
26、sited 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 19428-2959SAE J121, Decarburization in Hardened and TemperedUnified Threaded FastenersSAE J409,
27、 Product Analysis Permissible Variationsfrom Specified Chemical Analysis of a Heat or Castof SteelPublisher: Society of Automotive Engineers (SAE), 400Commonwealth Drive, Warrendale, PA 15096-00013 TERMINOLOGYFor definitions of other terms relating to fasteners orcomponent features thereof used in t
28、his Standard, referto ASME B18.12.4 DIMENSIONSUnless 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 dime
29、nsions shall beagreed upon between the supplier and purchaser.5 NUT DESIGNS AND PROPERTY GRADESThis 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 nu
30、t at its top sur-face. These are designated as property grade NE2, NE5,and NE8 meeting the mechanical and performancerequirements of Table 2 or 3.6 WIDTH ACROSS FLATSThe width across flats shall be the distance measuredperpendicular to the axis of the nut between two oppo-site wrenching flats.Copyri
31、ght ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18.16.6-2008Table 1 Nut DimensionsGrade identification(see section 13)BCE(ref.)AGGFDTol. tMinimum MaximumWidth AcrossMinimum Minimum Bearing Total R
32、unoutFlats, B Height, DNominal Width Across Hex Height Surface of BearingSize, A Max. Min. Corners, C Max. Min. (Ref.), E Diameter, F Surface, FIM140.439 0.430 0.488 0.328 0.298 0.225 0.416 0.0105160.502 0.489 0.557 0.359 0.329 0.250 0.475 0.011380.564 0.551 0.628 0.468 0.438 0.335 0.534 0.0127160.6
33、27 0.616 0.698 0.468 0.438 0.324 0.597 0.013120.752 0.736 0.840 0.609 0.579 0.464 0.712 0.0149160.877 0.861 0.982 0.656 0.626 0.469 0.830 0.015580.940 0.922 1.051 0.765 0.735 0.593 0.890 0.016341.064 1.052 1.191 0.890 0.860 0.742 1.033 0.018781.252 1.239 1.403 0.999 0.969 0.790 1.230 0.0201 1.440 1.
34、427 1.619 1.078 1.016 0.825 1.418 0.0221181.627 1.614 1.833 1.203 1.141 0.930 1.605 0.0251141.815 1.801 2.046 1.422 1.360 1.125 1.793 0.0281382.008 1.973 2.259 1.609 1.547 1.282 1.962 0.0311122.197 2.159 2.473 1.640 1.578 1.313 2.148 0.0347 CORNER FILLA rounding or lack of fill at the junction of he
35、x cornerswith the chamfer shall be permissible, provided thewidth across corners is within specified limits at andbeyond a distance equal to 17.5% of the nominal threaddiameter from the chamfered face.8 HEIGHTThe locknut height shall be the overall distance, mea-sured parallel to the axis of the loc
36、knut, from the top ofthe locknut to the bearing surface.29 HEX HEIGHTThe hex height is the distance, measured at a cornerof the hex, from the bearing surface.10 THREADSThreads shall be unified coarse or fine thread series(UNC or UNF series Class 2B) in accordance withASME B1.1. Inspection shall be b
37、ased on System 21 ofASME B1.3.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18.16.6-2008Table 2 Proof Loads, Clamp Loads, and Prevailing-Torques for Coarse Thread SeriesGrades NE2, NE5, an
38、d NE8 NutsPrevailing-TorqueNut SizeGrade NE2 Grade NE5 Grade NE8and Maximum Minimum MinimumThreads Per Proof Clamp Proof Clamp Proof Clamp First First FifthInch Load, lb Load, lb Load, lb Load, lb Load, lb Load, lb Install, in.-lb Removal, in.-lb Removal, in.-lb1420 2,900 1,300 3,800 2,000 4,750 2,8
39、50 40 5.0 1.551818 4,700 2,150 6,300 3,350 7,850 4,700 80 8.0 2.53816 7,000 3,200 9,300 4,950 11,600 6,950 110 12.0 4.071614 9,550 4,400 12,800 6,800 15,900 9,600 135 17.0 5.01213 12,800 5,850 17,000 9,050 21,300 12,800 204 22.0 7.591612 16,400 7,550 21,800 11,600 27,300 16,400 300 30.0 10.05811 20,
40、300 9,300 27,200 14,500 33,900 20,300 420 39.0 12.53410 30,000 13,800 40,100 21,300 50,100 30,100 540 58.0 20.0789 41,600 12,400 55,400 29,500 69,300 41,600 840 88.0 30.018 54,500 15,000 72,700 38,700 90,900 54,600 1,080 120.0 40.01187 68,700 18,900 80,100 42,100 115,000 69,000 1,200 150.0 50.01147
41、87,200 24,000 101,700 53,500 145,000 87,000 1,320 188.0 60.01386 104,000 28,700 121,300 63,800 173,000 104,000 1,620 220.0 70.01126 126,000 34,800 147,500 77,600 211,000 127,000 1,800 260.0 90.0Table 3 Proof Loads, Clamp Loads, and Prevailing-Torques for Fine Thread SeriesGrades NE2, NE5, and NE8 Nu
42、tsPrevailing-TorqueNut SizeGrade NE2 Grade NE5 Grade NE8and Maximum Minimum MinimumThreads Per Proof Clamp Proof Clamp Proof Clamp First First FifthInch Load, lb Load, lb Load, lb Load, lb Load, lb Load, lb Install, in.-lb Removal, in.-lb Removal, in.-lb1428 3,300 1,500 4,350 2,300 5,450 3,250 40 5.
43、0 1.551624 5,200 2,400 6,950 3,700 8,700 5,200 60 8.0 2.53824 7,900 3,600 10,500 5,600 13,200 7,900 110 12.0 4.071620 10,700 4,900 14,200 7,550 17,800 10,700 135 17.0 5.01220 14,400 6,550 19,200 10,200 24,000 14,400 204 22.0 7.591618 18,300 8,350 24,400 13,000 30,400 18,300 300 30.0 10.05818 22,900
44、10,500 30,700 16,300 38,400 23,000 420 39.0 12.53416 33,600 15,400 44,800 23,800 56,000 33,600 540 58.0 20.07814 45,800 12,600 61,100 32,400 76,400 45,800 840 88.0 30.0114 61,100 16,800 81,500 43,300 101,900 61,100 1,080 120.0 40.0112 59,700 16,400 79,600 42,300 99,500 59,700 1,080 120.0 40.011812 7
45、6,900 21,200 89,900 47,500 128,000 76,800 1,200 150.0 50.011412 96,600 26,600 113,000 59,700 161,000 96,600 1,320 188.0 60.013812 118,000 32,500 138,000 72,900 197,000 118,000 1,620 220.0 70.011212 142,000 39,100 166,000 87,700 237,000 142,000 1,800 260.0 90.03Copyright ASME International Provided b
46、y IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B18.16.6-2008Table 4 Chemical Composition RequirementsNut C, Mn, P, S,Grade Max. Min. Max. Max.NE2 0.47 . . . 0.12 0.15Note (1) Note (2)NE5 0.55 0.30 0.05 0.15Notes (3),(4) Notes (2)
47、,(4)NE8 0.55 0.30 0.04 0.05Note (5)GENERAL NOTE: All values are for ladle analysis (percent by weight)and are subject to standard variations for check analysis as given inSAE J409.NOTES:(1) Resulfurized and rephosphorized material is not subject torejection based on check analysis for sulfur.(2) If
48、agreed between purchaser and producer, sulfur content maybe 0.23 max.(3) Phosphorus content may be 0.13 max. for acid bessemer steelonly.(4) If agreed between purchaser and producer, sulfur content maybe 0.35 max. and phosphorus content may be 0.12 max., pro-vided that manganese content is 0.70 min.(5) If agreed between purchaser and producer, sulfur content maybe 0.33 max., provided that manganese content is 1.35 min.Table 5 Hardness RequirementsNut Grade Locknut Size Rockwell HardnessNE2, NE514112C28, max.NE81458C24C32341 C26C3411811
