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ASME B18.9-2012 pdf download

ASME B18.9-2012 pdf download.Plow Bolts.
1 INTRODUCTION 1.1 Scope 1.1.1 This Standard covers general and dimen- sional data for inch series plow bolts recognized as American National Standard. 1.1.2 The inclusion of dimensional data in this Standard is notintended to imply that all ofthe products describedarestockproductionitems. Consumers should consult 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 Table 1 and No. 7 head (round countersunk reverse key head) plow bolts in Table 2 for new designs. It includes No. 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 in Table 4, and No. 7 repair head (round countersunk reverse key head) plow bolts in Table 2 for service purposes. 1.2.2 NonmandatoryAppendixAprovides dimen- sions of No. 4 regular head (square countersunk head) plow bolts in Table A-1, and No. 6 regular head (round countersunk heavy key head) plow bolts in Table A-2 as supplementary information, but not as part of this Standard. 1.3 Referenced Standards The following is a list of publications referenced in this Standard. Unless otherwise specified, the referenced standard shall be the most recent issue at the time of order placement. ASME B1.1, Unified Inch Screw Threads (UN and UNR Thread Form) ASME B1.2, Gages and Gaging for Unified Inch Screw Threads ASME B1.3, Screw 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, Quality Assurance for Fasteners 1 ASME B18.24, Part Identifying Number (PIN) Code System Standard for B18 Fastener Products 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 2900, Fairfield, NJ 07007-2900 (www.asme.org) ASTM A307, Carbon Steel Bolts and Studs, 60,000 psi Tensile Strength ASTM F468, Nonferrous Bolts, Hex Cap Screws, and Studs for General Use ASTM F593, Stainless Steel Bolts, Hex Cap Screws and Studs ASTM F788/F788M, Surface Discontinuities of Bolts, Screws, and Studs — Inch and Metric Series Publisher: ASTM International (ASTM), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959 (www.astm.org) SAE J429, Mechanical and Material Requirements of Externally Threaded Fasteners Publisher: Society of Automotive Engineers (SAE International), 400 Commonwealth Drive, Warrendale, PA 15096-0001 (www.sae.org) 1.4 Terminology Fordefinitionsofterms relatingto fasteners orcompo- nent features thereof used in this Standard, refer to ASME B18.12. 1.5 Dimensions All dimensions in this Standard are given in inches and apply before any coating, unless otherwise specified. Dimensioning and tolerancing in this Standard are in accordance with ASME Y14.5M, except where dimen- sions less than 1 in. carry a zero to the left of the decimal. 1.6 Part Identifying Number (PIN) Code System For a recommended part identification numbering (PIN) system, see ASME B18.24. 2 GENERAL DATA 2.1 Body Diameter 2.1.1 Bolt body diameters shall not exceed the maximum specified in the dimensions of Tables 1 through 6.
2.1.2 Unless otherwise specified in the order by the purchaser, bolts that are not threaded full length shall be furnished with full diameter body within the limits specified in the dimensions tables. On bolts that are threaded full length, the diameter of the unthreaded length under the head or neck shall not be less than the minimum pitch diameter of the thread. 2.1.3 Bolts may be obtained with reduced diameter body. 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 in Table 7. 2.2.2 Tolerances on length of bolts are specified in Table 8. 2.3 Threads 2.3.1 Thread Series and Class. Threads shall be Unified Coarse (UNC or UNRC Series), Class 2A, in accordance with ASME B1.1. Threads without any sur- face plating or coating will be accepted using the high and 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 the bolt to the last complete (full form) thread. The mini- mum thread lengths are specified in Table 7. Tolerances on thread length are specified in Table 9.

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