ASME B18.9 pdf free download

ASME B18.9 pdf free download Plow Bolts
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1INTRODUCTION
1.1 Scope
1.1.1 This Standard covers general and dimen-sional data for inch series plow bolts recognized asAmerican National Standard.
1.1.2 The inclusion of dimensional data in this
Standard is not intended to imply that all of the products
described are stock production items. consumers shouldconsult with suppliers concerning the availability of
products.
1.2 Head Types
1.2.1 This Standard recommends No. 3 head(round countersunk head square neck) plow bolts in
iable 1 and No. 7 head (round countersunk reverse keyhead) plow bolts in Table 2 for new designs. It includesNo. 3 repair head (round countersunk head square neck)
plow bolts in Table 1, No.4 repair head (square counter-sunk head) plow bolts in Table 3,No. 6 repair head
(round countersunk heavy key head) plow bolts iniable 4, and No. 7 repair head (round countersunkreverse key head) plow bolts in Table 2 for servicepurposes.
1.2.2Nonmandatory Aopendix A orovidoc dimon-sions of No.4 regular head (square countersunk head)
plow bolts in Table A-1, and No. 6 regular head (roundcountersunk heavy key head) plow bolts in Table A-2as supplementary information, but not as part of thisStandard.
1.3 Referenced Standards
The following is a list of publications referenced inthis Standard.Unless otherwise specified, the referencedstandard shall be the most recent issue at the time oforder placement.
ASME B1.1,Unified Inch Screw Threads (UN and UNRThread Form)
ASME B1.2,Gages and Gaging for Unified Inch ScrewThreads
ASME B1.3,Screw Thread Gaging Systems for
Dimensional Acceptability Inch and Metric ScrewThreads (UN, UNR,UNJ, M, and MJ)
ASME B18.12,Glossary of Terms for MechanicalFasteners
ASME B18.18,Quality Assurance for Fasteners
ASME B18.24,Part Identifying Number (PIN) CodeSystem Standard for B18 Fastener Products
ASME Y14.5M,Dimensioning and TolerancingPublisher: The American Society of MechanicalEngineers (ASME)。Three Park Avenue,New York,NY 10016-5990; Order Department: 22 Law Drive,P.O.Box 2900, Fairfield, NJ 07007-2900
(www.asme.org)
ASTMA307,Carbon Steel Bolts and Studs,60,0o0 psiTensile Strength
ASTM F468,Nonferrous Bolts, Hex Cap Screws, andStuds for General Use
ASTM F593,Stainless Steel Bolts, Hex Cap Screwsand Studs
ASTM F788/F788M,Surface Discontinuities of Bolts,Screws, and Studs — Inch and Metric Series
Publisher: ASTM International (ASTM),100 Barr HarborDrive,P.O.Box C700, West Conshohocken,PA
19428-2959 (www.astm.org)
SAE J429, Mechanical and Material Requirements ofExternally Threaded Fasteners
Publisher: Society of Automotive Engineers (SAEInternational),400 Commonwealth Drive,
warrendale, PA 15096-0001 (www.sae.org)1.4 Terminology
For definitions of terms relating to fasteners or compo-nent features thereof used in this Standard, refer to
ASME B18.12.
1.5 Dimensions
All dimensions in this Standard are given in inchesand apply before any coating, unless otherwise
specified.
Dimensioning and tolerancing in this Standard are inaccordance with ASME Y14.5M, except where dimen-
sions less than 1 in. carry a zero to the left of the decimal.1.6 Part ldentifying Number (PIN) Code System
For a recommended part identification numbering(PIN) system, see ASME B18.24.
2GENERAL DATA
2.1 Body Diameter
2.1.1 Bolt body diameters shall not exceed themaximum specified in the dimensions of Tables 1through 6.
2.1.2Unless otherwise specified in the order bythe purchaser, bolts that are not threaded full lengthshall be furnished with full diameter body within thelimits specified in the dimensions tables.
On bolts that are threaded full length, the diameter
of the unthreaded length under the head or neck shallnot be less than the minimum pitch diameter of the
thread.
2.1.3 Bolts may be obtained with reduced diameterbody. Where reduced diameter body is specified,the
body diameter shall be neither less than the minimum
pitch diameter of the thread nor greater than the mini-mum major diameter of the thread.
2.2 Length
2.2.1 The length of a plow bolt is the overall dis-tance from the end of the bolt to the top of the head.The recommended lengths of plow bolts are given inTable 7.
2.2.2Tolerances on length of bolts are specifiedin Table 8.
2.3 Threads
2.3.1 Thread Series and Class. Threads shall beUnified Coarse (UrC or UNRC Series), Class 2A, inaccordance with ASME B1.1.Threads without any sur-
face plating or coating will be accepted using the highand low limits of the applicable 2A thread gage
(GO/NO Go).Coated or plated threads will be accept-able using the 3A high limit(GO) and 2A low limit
(NO Go) gages for the applicable thread size.
2.3.2 Thread Gaging. Unless otherwise specified,
dimensional acceptance of screw threads shall be deter-mined by using System 21 of ASME B1.3.
2.4 Thread Length
The thread length is measured from the end of thebolt to the last complete (full form) thread.The minimum thread lengths are specified in Table 7.Toleranceson thread length are specified in Table 9.