1961_2017.pdf

A M E R C A N STANDARD Miniature ASA 818.11-1961 REAFFIRMED 1983 UDC 621.882 REAFFIRMED 2000 FOR CURRENT COMMITTEE PERSONNEL PLEASE SEE ASME MANUAL AS.11 on;Jor;JSociety of Automotive Engineers Screws The American Society of Mechanical Engineers THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS United Engineering Center 345 East 47th Street New York,N.Y.10017 REAFFIRMED 2017ANSI 818.11-1961 7 April 1971 ACCEPTANCE NOTICE The following Industry Standardization Document was adopted on 7 April 1971 for mandatory use by the Department of Defense.The indicated industry group has furnished the clearances required by existing regula-tions.Copies of this document are stocked by the DOD Single Stock Point,Naval Publications and Forms Cen-ter,Philadelphia,Pennsylvania 19120,for issue to Military Activities and Federal Agencies only.Title of Document:Miniature Screws Document No.:ANSI B18.11-1961 Date of Adopted Issue:1961 Releasing Industry Group:The American Society of Mechanital Engineers Custodians:Army-W C Navy-SH Air Force-82 Reviewer Activities:Army-AT.AV.MU Navy-None Air Force-None Military Coordinating Activity:Army-W C Roiect No.5305-1 097 I FSC 5305 I 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 Copyright 1961,by Reprinted March 1972 Printed in U.S.A.Foreword M INIATURE screws,as covered by this standard,are those having threads of a nominal diam-eter from 0.0118 inch(0.3 mm)to 0.0551 inch(1.4 mm).Demand for screws and threads of such sizes has extended in recent years from the needs of the watch industry to subminiaturiza-tion requirements of control mechanisms,instruments,and other devices.This led to the develop-,ment of Unified Miniature Screw Threads,ASA B1.lO-1958.This is the complement to the screw thread standard to provide a recommended series of miniapre screws and nuts.Subcommittee 13 of Sectional Committee B18 first undertook development of a product standard for miniature screws which was submitted to letter ballot of the Sectional Committee February 9,1960.Final approval a s an American Standard was given on February 20,1961.Standards for nuts are in process of development.Officers of Sectional Committee H.W.Robb,Cbairmata,Engineering Services,General Electric Co.,1 River Road,F.V.Kupchak,Vice Chairman,Westinghouse Electric Corp.,Standards Department 2-F,R.B.Belford,Seaetary,Technical Advisor,Industrial Fasteners Institute,1517 Terminal Tower,personnel of Subcommittee No.13 on Miniature Screws Schenectady 5,New York East Pittsburgh,Penna.Cleveland 13,Ohio M.A.Schultheis,Chairman,Staff Engineer,Engineering Standards,Building 6,Mail Station T2057,J.C.Burgbacher,Watch Engineer,Bdova Watch Company,Inc.,Bulova Park,Flushing 70,N.Y.J.B.Dirlam,J.I.Morris Company,394 Elm Street,Southbridge,Mass.E.0.Drescher,Bulova Watch Company,Inc.,75-20 Astoria Blvd.,Flushing 70,N.Y.F.L.Calkins,Liaison,Wright Air Development Div.,Standardization Section,Attn:WWDXSS,I.H.Fullmer,Chief,Engineering Metrology Section,National Bureau of Standards,Washington 25,D.C.M.C.Kunt,Weston Electrical Instrument Corp.,614 Freylinghuysen Avenue,Newark,N.J.F.V.Kupchak,Westinghouse Electric Corp.,Standards Department 2-F,East Pittsburgh,Pa.Vincent Meigs,Autonetics,A Division of North American Aviation,Inc.,9150 E.Imperial Highway,R.L.Rufsuyder,Senior Design Engineer,Oldsmobile Motor Div.,General Motors Cop.,a n i n g,Mich.E.H.Schaeffer,Chief Manufacturing Engineer,Elgin National Watch co.,Elgin,Illinois c.E.Smart,Works Manager,.W.&L.E.Gurley,514 Fulton Street,Troy,N.Y.R.B.Tackaberry,Development Physicist,American Optical Co.,Instrument Division,Buffalo 15,N.y.F.P.Tisch,Chief Metrologist,Voi-Shan Mfg.Company,A Division of Voi-Shan Industries,Inc.,Hughes Aircraft Co.,Culver City,Calif.Wright-Patterson AFB,Ohio Downey,Calif.8463 Higuera St.,Culver City,Calif.K.T.Vande,Chief Draftsman,Bausch&Lomb 0ptic.d Co.,635 St.Paul St.,Rochester,N.Y.D.F.Viles,President,Waltham Screw Company,Waltham 54,Mass.Jack Watson,Supervisor Engineering Standards,Radioplane,A Dip.of Northrup Corp.,8000 Woodley Ave.,P.F.Weber,Assistant Works Mgr.,Kollsman Instrument Cotp.,80-08 45th Ave.,Elmhurst 73,N.Y.D.Whiteman,Works Manager,Anti-Corrosive Metd Products Co.,Inc.,Castleton-on-Hudson,N.Y.Van Nuys,Calif.AMERICAN STANDARD Slotted Head Miniature Screws INTRODUCTION 1.Scope.This standard establishes head types,their dimensions,and lengths of slotted head miniature screws,threaded in conformance with American Standard Unified Miniature Screw Threads,ASA BI.lO.This standard is predicated upon information derived through research of the maximum using industries.The inclusion of four head types and the given thread sizes in the data tables is not in-tended to imply that all of those described in this standard are stock production items.Preferred diameter pitch combinations for general use are shown in bold type in the table