ASME B18.16.4-2008 六角法兰锁紧螺母

A N A M E R I C A N N A T I O N A L S T A N D A R D ASME B18.16.4-2008 Serrated Hex Flange Locknuts 90,000 psi (Inch Series) Date of Issuance: October 7, 2008 This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda issued to this edition. ASME issues written replies to inquiries concerning interpretations of technical aspects of this document. 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 Committee Pages at http://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 National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. 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ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME 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 Mechanical Engineers Three Park Avenue, New York, NY 10016-5990 Copyright © 2008 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved Printed in U.S.A. CONTENTS Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv Committee Roster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Correspondence With the B18 Committee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Comparison to ISO Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 Reference Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6 Serrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7 Tops of Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8 True Position of Hexagon to Tapped Hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 9 Countersink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 10 Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 11 Material and Hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 12 Mechanical Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 13 Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 14 Grade and Identification Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 15 Inspection and Quality Assurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 16 Designation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 17 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 18 Workmanship . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Tables 1 Regular Serrated Flange Locknuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Large Serrated Flange Locknuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Proof Load and Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 iii ASME B18.16.4-2008 Serrated Hex Flange Locknuts 90,000 psi (Inch Series) A N AM E R I C A N N AT I O N A L S TA N D A R D FOREWORD This 2008 edition was approved by the American National Standards Institute on August 25, 2008, and designated as ASME B18.16.4-2008. iv ASME B18 COMMITTEE Standardization of Bolts, Nuts, Rivets, Screws, Washers, and Similar Fasteners (The following is the roster of the Committee at the time of approval of this Standard.) STANDARDS COMMITTEE OFFICERS D. A. Clever, Chair R. D. Strong, Vice Chair R. L. Crane, Secretary STANDARDS COMMITTEE PERSONNEL V. Cartina, Continental-Aero D. A. Clever, Deere & Co. A. P. Cockman, Ford Motor Co. B. D. Burnside, Alternate, Ford Motor Co. R. L. Crane, The American Society of Mechanical Engineers A. C. DiCola, Wrought Washer Co. B. A. Dusina, Federal Screw Works J. S. Foote, Contributing Member, Trade Association Management, Inc. D. S. George, ND Industries J. Greenslade, Industrial Fasteners Institute J. J. Grey, Contributing Member, Fastener Consulting Services, Inc. B. Hasiuk, Contributing Member, Defense Supply Center Philadelphia A. Herskovitz, Consultant J. Jennings, Contributing Member, Naval Surface Warfare Center SUBCOMMITTEE 16 — LOCKNUTS W. R. Stevens, Chair, Ramco V. Cartina, Vice Chair, Continental-Aero A. P. Cockman, Ford Motor Co. B. A. Dusina, Federal Screw Works M. A. Elmi, Catepillar, Inc. D. S. George, ND Industries J. Greenslade, Industrial Fasteners Institute J. J. Grey, Fastener Consulting Services, Inc. v J. F. Koehl, Contributing Member, Spirol International Corp. W. H. Kopke, ITW Shakeproof Assembly Components J. G. Langenstein, Honorary Member, Consultant W. J. Lutkus, Heli-Coil Emhart D. A. McCrindle, Canadian Fasteners Institute M. D. Prasad, Contributing Member, General Motors Corp. S. Savoji, ITW Medalist W. R. Schevey, Contributing Member, BGM Fastener Co., Inc. W. R. Stevens, Ramco R. D. Strong, General Motors Corp. S. W. Vass, Consultant C. B. Wackrow, Contributing Member, MNP Corp. W. K. Wilcox, Consultant C. B. Williamson, Fastenal Co. C. J. Wilson, Consultant R. B. Wright, Contributing Member, Wright Tool Co. J. G. Zeratsky, National Rivet and Manufacturing Co. J. Jennings, Naval Surface Warfare Center J. F. McCarrick, Defense Supply Center Philadelphia W. L. Sakowski, Account Managers LLC D. F. Sharp, GMS Structural Engineers D. J. Soscia, Electric Boat Corp. R. D. Strong, General Motors Corp. W. K. Wilcox, Consultant C. B. Williamson, Fastenal Co. C. J. Wilson, Consultant CORRESPONDENCE WITH THE B18 COMMITTEE General. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may interact with the Committee by requesting interpretations, proposing revisions, and attending Committee meetings. Corre- spondence should be addressed to: Secretary, B18 Standards Committee The American Society of Mechanical Engineers Three Park Avenue New York, NY 10016-5990 Proposing Revisions. Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard. Approved revisions will be published periodically. The Committee welcomes proposals for revisions to this Standard. Such proposals should be as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed description of the reasons for the proposal, including any pertinent documentation. Proposing a Case. Cases may be issued for the purpose of providing alternative rules when justified, to permit early implementation of an approved revision when the need is urgent, or to provide rules not covered by existing provisions. Cases are effective immediately upon ASME approval and shall be posted on the ASME Committee Web page. Requests for Cases shall provide a Statement of Need and Background Information. The request should identify the standard, the paragraph, figure or table number(s), and be written as a Question and Reply in the same format as existing Cases. Requests for Cases should also indicate the applicable edition(s) of the standard to which the proposed Case applies. Interpretations. Upon request, the B18 Standards Committee will render an interpretation of any requirement of the Standard. Interpretations can only be rendered in response to a written request sent to the Secretary of the B18 Standards Committee. The request for an interpretation should be clear and unambiguous. It is further recommended that the inquirer submit his/her request in the following format: Subject: Cite the applicable paragraph number(s) and the topic of the inquiry. Edition: Cite the applicable edition of the Standard for which the interpretation is being requested. Question: Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation. The inquirer may also include any plans or drawings, which are necessary to explain the question; however, they should not contain proprietary names or information. Requests that are not in this format may be rewritten in the appropriate format by the Committee prior to being answered, which may inadvertently change the intent of the original request. ASME procedures provide for reconsideration of any interpretation when or if additional information that might affect an interpretation is available. Further, persons aggrieved by an interpretation 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 Committee regularly holds meetings, which are open to the public. Persons wishing to attend any meeting should contact the Secretary of the B18 Standards Committee. vi ASME B18.16.4-2008 SERRATED HEX FLANGE LOCKNUTS 90,000 psi (INCH SERIES) 1 SCOPE This Standard covers the general, dimensional, and mechanical performance requirements for low strength carbon steel, case hardened, regular and large serrated flange locknuts (inch series), recognized as American National Standard. 2 COMPARISON TO ISO STANDARDS There is no inch series ISO standard for these products at this time. 3 TERMINOLOGY For definitions of terms relating to fasteners or component features used in this Standard, refer to ASME B18.12. 4 REFERENCE STANDARDS The following is a list of publications referenced in this Standard. ASME B1.1, Unified Inch Screw Threads ASME B1.3, Screw and Thread Gaging Systems for Dimensional Acceptability — Inch and Metric Screw Threads (UN, UNR, UNJ, M, and MJ) ASME B18.12, Glossary of Terms for Mechanical Fasteners ASME B18.18.2M, Inspection and Quality Assurance for High-Volume Machine Assembly Fasteners ASME Y14.5M, Dimensioning and Tolerancing Publisher: The American Society Of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990; Order Department: 22 Law Drive, P.O. Box 2300, Fairfield, NJ 07007-2300 ASTM F 606, Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets ASTM F 812, Specification for Surface Discontinuities of Nuts, Inch Series ASTM F 1941, Electrodeposited Coatings on Threaded Fasteners [Unified Inch Screw Threads (UN/UNR)] ASTM F 2282, Standard Specification for Quality Assurance Requirements for Carbon and Alloy Steel Wire, Rods, and Bars for Mechanical Fasteners 1 ASTM F 2328, Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, and Studs Publisher: ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959 5 DIMENSIONS (a) Unless otherwise specified, all dimensions in this Standard shall be as specified in Tables 1 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 perform- ance 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 of 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 maxi- mum 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 3⁄8 in. nominal size nuts and smaller, and 1.08 times the basic major diameter for ASME B18.16.4-2008 Table 1 Regular Serrated Flange Locknuts B F G A ø Section 8 A A– 3X M Table 1M H K J See section 7 See section 6 Slight rounding permissable 30° ref High points Nominal Size or Minimum Maximum Width Across Width Across Flange NutBasic Major Minimum Flange Perpendicularity Flats, F Corners, G Diameter, B Thickness, HDiameter of Hex Thick- of Bearing Thread Max. Min. Max. Min. Max. Min. Max. Min. Height, J ness, K Surface No. 6 0.1380 0.312 0.302 0.361 0.342 0.422 0.408 0.171 0.156 0.10 0.02 0.014 8 0.1640 0.344 0.334 0.397 0.381 0.469 0.452 0.203 0.187 0.13 0.02 0.016 10 0.1900 0.375 0.365 0.433 0.416 0.500 0.480 0.219 0.203 0.13 0.03 0.017 12 0.2160 0.438 0.428 0.505 0.488 0.594 0.574 0.236 0.222 0.14 0.04 0.020 1⁄4 0.2500 0.438 0.428 0.505 0.488 0.594 0.574 0.236 0.222 0.14 0.04 0.020 5⁄16 0.3125 0.500 0.489 0.577 0.557 0.680 0.660 0.283 0.268 0.17 0.04 0.023 3⁄8 0.3750 0.562 0.551 0.650 0.628 0.750 0.728 0.347 0.330 0.23 0.04 0.025 7⁄16 0.4375 0.688 0.675 0.794 0.768 0.937 0.910 0.395 0.375 0.26 0.04 0.032 1⁄2 0.5000 0.750 0.736 0.866 0.840 1.031 1.000 0.458 0.437 0.31 0.05 0.035 9⁄16 0.5625 0.875 0.861 1.010 0.982 1.188 1.155 0.506 0.483 0.35 0.05 0.040 5⁄8 0.6250 0.938 0.922 1.083 1.051 1.281 1.248 0.569 0.545 0.40 0.05 0.044 3⁄4 0.7500 1.125 1.088 1.299 1.240 1.500 1.460 0.675 0.627 0.46 0.06 0.051 GENERAL NOTE: Dimensions are in inches. 2 ASME B18.16.4-2008 Table 2 Large Serrated Flange Locknuts B F G A ø Section 8 A A– 3X M Table 2M H K J See section 7 See section 6 Slight rounding permissable 30° ref High points Nominal Size or Minimum Maximum Width Across Width Across Flange Nut Thickness,Basic Major Minimum Flange Perpendicularity Flats, F Corners, G Diameter, B HDiameter of Hex Thick- of Bearing Thread Max. Min. Max. Min. Max. Min. Max. Min. Height, J ness, K Surface 1⁄4 0.2500 0.438 0.428 0.505 0.488 0.728 0.700 0.312 0.281 0.15 0.04 0.024 5⁄16 0.3125 0.500 0.489 0.577 0.557 0.820 0.790 0.375 0.343 0.20 0.04 0.028 3⁄8 0.3750 0.562 0.551 0.650 0.628 0.915 0.885 0.406 0.390 0.24 0.04 0.031 7⁄16 0.4375 0.688 0.675 0.794 0.768 1.131 1.100 0.468 0.437 0.26 0.04 0.038 1⁄2 0.5000 0.750 0.736 0.866 0.840 1.205 1.175 0.515 0.485 0.29 0.06 0.041 9⁄16 0.5825 0.875 0.861 1.010 0.982 1.300 1.260 0.578 0.546 0.37 0.06 0.044 5⁄8 0.6250 0.938 0.922 1.083 1.051 1.360 1.280 0.640 0.600 0.42 0.06 0.045 GENERAL NOTE: All dimensions are in inches. nuts larger than 3⁄8 in. No part of the threaded portion shall project beyond 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. 11 MATERIAL AND HARDNESS Unless otherwise specified, nuts shall be manufac- tured from carbon steel in accordance with ASTM F 2282. The nuts shall have a case hardness of HR 15N 78-90 on the surface of the nut in accordance with ASTM F 2328. For referee purposes, case hardness shall be measured in the serrations. 3 12 MECHANICAL REQUIREMENTS 12.1 Proof Load Test Nuts shall meet the proof load test using the values in Table 3. The proof load test procedure from ASTM F 606 shall be followed. 12.2 Break Loose Torque Test Nuts shall have a break loose torque value equal to or greater than 100% of the seating torque value. The seating torque value shall be ±10% of the values listed in Table 3. (a) Procedure. Place a test bolt through a cold-rolled steel strip and spacers as required. Assemble a test nut so that at least three thread pitches of the bolt extend beyond the top of the nut. While preventing the steel strip from rotating, apply the torque value listed in Table 3. Record the seating torque values, break the nut loose from its seated position, and record the highest ASME B18.16.4-2008 Table 3 Proof Load and Torque Values Nut Size Nut Size and Threads Proof Seating and Threads Proof Seating per inch Load, lb Torque per inch Load, lb Torque 6-32 820 50 in.-lb 8-32 1,250 60 in.-lb 10-24 1,650 70 in.-lb 12-24 2,200 90 in.-lb 1⁄4-20 2,900 9 ft-lb 5⁄16-18 4,700 14 ft-lb 3⁄8-16 7,000 27 ft-lb 7⁄16-14 9,550 40 ft-lb 1⁄2-13 12,800 62 ft-lb 9⁄16-12 16,400 82 ft-lb 5⁄8-11 20,300 125 ft-lb 3⁄4-10 30,000 240 ft-lb 6-40 900 55 in.-lb 8-36 1,350 65 in.-lb 10-32 1,800 75 in.-lb 12-28 2,300 95 in.-lb 1⁄4-28 3,3