ASME B1.13M 2005 R2020
$98.04
ASME B1.13M-2005 (R2020): Metric Screw Threads: M Profile
| Published By | Publication Date | Number of Pages |
| ASME | 2005 | 84 |
This Standard contains general metric standards for a 60 deg symmetrical screw thread with a basic ISO 68-1 profile designated M profile. The M profile threads of tolerance class 6H/6g are intended for metric applications where inch class 2A/2B have been used. At the minimum material limits, the 6H/6g results in a looser fit than the 2A/2B. Tabular data is also provided for a tighter tolerance fit external thread of class 4g6g, which is approximately equivalent to the inch class 3A but with an allowance applied. Formulation and tolerancing data is included for applications requiring other fits
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | CONTENTS |
| 6 | FIGURES TABLES |
| 7 | NONMANDATORY APPENDICES |
| 8 | FOREWORD |
| 10 | COMMITTEE ROSTER |
| 11 | 1 GENERAL 1.1 Scope 1.2 Interchangeability 1.2.1 Assembly. 1.3 References 1.4 Acceptability 1.5 Reference Temperature 1.6 General Symbols 1.7 Units 1.8 Federal Government Use |
| 12 | 2 TERMINOLOGY 2.1 Definitions 1 General Symbols |
| 13 | 2 Thread Data, M Profile |
| 14 | 3 SCREW THREAD PROFILE 3.1 Basic M Thread Profile 1 Basic M Thread Profile (ISO 68-1 Basic Profile) |
| 18 | 5.1.2 Basic Size. 5.1.3 Upper Deviation. 5.1.4 Lower Deviation. 5.1.5 Fundamental Deviations Allowances. 5.1.6 Fits. 5.1.7 Tolerance. 3 Limit Values for M Profile Minimum Rounded Root Radius 4 Standard Coarse Pitch M Profile General Purpose and Mechanical Fastener Series 5 Standard Fine Pitch M Profile Screw Threads |
| 19 | 6 ISO 261 Diameter/Pitch Combinations From Which the Standards Were Selected |
| 21 | 5.2 Tolerance Grade |
| 22 | 5.3 Tolerance Position 5.4 Allowance/Tolerance Formulas and Tables 5.5 Selected Tolerance Classes 5.5.1 External Thread Tolerance Classes. 5.5.2 Internal Thread Tolerance Class. 5.6 Length of Thread Engagement 5.6.1 Normal Length of Thread Engagement. 5.6.2 Short and Long Lengths of Thread Engagement When Gaged With Normal Length Contacts. 5.7 Circular Runout 5.7.1 Internal Thread. 5.7.2 External Thread. 5.8 Lead and Flank Angle Tolerances 5.9 Coated or Plated Threads 6 DESIGN FORMULAS AND TABULATED VALUES FOR ALLOWANCES AND TOLERANCES 6.1 General 6.2 Rounding Procedure for Tabulated Values |
| 23 | 7 Length of Thread Engagement (ISO 965-1) |
| 24 | 8 Examples of Tolerance Classes Required for Normal Gage Length Contacts With Various Thread Engagement Lengths 9 Minor Diameter Tolerances of Internal Thread, TD1 (ISO 965-1) |
| 25 | 6.3 Allowances Fundamental Deviations 6.4 Length of Thread Engagement 6.5 Crest Diameter Tolerances 6.5.1 Tolerances for Minor Diameter of Internal Thread, TD inf.1. 6.5.1.1 6.5.2 Tolerances for Major Diameter of External Thread, Td, Grade 6. 6.5.2.1 6.6 Pitch Diameter Tolerances 6.6.1 Tolerances for Pitch Diameter of External Thread, Td inf.2. 10 Major Diameter Tolerances of External Thread, Td (ISO 965-1) |
| 26 | 11 Pitch Diameter Tolerance of External Thread, Td2 (ISO 965-1) |
| 27 | 12 Pitch Diameter Tolerance of Internal Thread, TD2 (ISO 965-1) |
| 28 | 6.6.1.1 6.6.2 Tolerances for Pitch Diameter of Internal Thread, TD inf.2. 13 Allowance (Fundamental Deviation) for Internal and External Threads (ISO 965-1) |
| 29 | 7 DESIGNATION OF SCREW THREADS 7.1 General 7.2 Designation of Standard Screw Threads 7.2.1 Designation of Left-Hand Thread. 7.2.2 Designation of Identical Tolerance Classes. |
| 30 | 7.2.3 Designations Using All Capital Letters. 7.3 Designation of Thread Fit 7.4 Designation of Rounded Root External Thread 7.4.1 Modified ISO 68Ã1 Thread With Radius Root r min. = 0.125P. 7.4.2 Designation of Special Rounded Root Thread. 7.5 Designation of Threads Having Modified Crests 7.6 Designation of Special Threads 7.7 Designation of Multiple Start Threads 7.8 Designation of Coated or Plated Threads 7.8.1 Designation of Coated or Plated M Threads. 7.8.2 7.9 Designation of Threads With Adjusted Size Limits |
| 31 | 8 DIMENSIONAL ACCOMMODATION OF COATING OR PLATING FOR 60 deg THREADS 8.1 Introduction 8.2 Material Limits for Coated Threads 8.3 Dimensional Effects of Coating 8.4 External Thread With Allowance Available for Coating 8.4.1 Maximum and Minimum Coating Thickness Specified. 8.4.2 Only Nominal or Minimum Coating Thickness Specified. |
| 33 | 8.5 External Thread With No Allowance for Coating 8.5.1 Maximum and Minimum Coating Thickness Specified. 8.5.2 Only Nominal or Minimum Coating Thickness Specified. 7 Effects of Electrodeposited Coating on 60 deg External Threads |
| 34 | 8.5.3 Adjusted Size Limits. 8.5.4 Strength. 8.6 Internal Threads 8.6.1 Maximum and Minimum Coating Thickness Specified. 8.6.2 Only Nominal or Minimum Coating Thickness Specified. 8.6.3 Adjusted Size Limits. 8.6.4 Strength. 8.7 Electrodeposited Coatings |
| 35 | 8.8 Other Considerations 9 LIMITS OF SIZE 9.1 Standard Thread Series 9.2 Determination of Size Limits 9.3 Formulas for Calculating Limiting Dimensions for M Profile Screw Threads 9.3.1 Internal Thread 9.3.2 External Thread |
| 36 | 14 External Thread – Limiting Dimensions M Profile |
| 45 | 15 Internal Thread — Limiting Dimensions M Profile |
| 47 | 10 LEAD AND FLANK ANGLE TOLERANCES 10.1 Lead and Flank Angle Acceptance 10.1.1 10.1.2 10.1.3 9 External Thread — Limiting M Thread Profile |
| 48 | 10.1.4 10.1.5 10.1.6 |
| 49 | 16A Example of External Screw Thread, Standard Size |
| 51 | 16B Example of Internal Metric Screw Thread, Standard Size |
| 53 | 16C Example of External Metric Screw Thread, Non-Standard Size |
| 55 | 16D Example of Internal Metric Screw Thread, Non-Standard Size |
| 57 | 17 Allowable Variations in Lead and Equivalent Change in Functional Diameter |
| 60 | 18 Allowable Variations in 30 deg Basic Half-Angle of Screw Threads |
| 61 | A STANDARD RULES FOR ROUNDING |
| 62 | B THREAD STRENGTH DESIGN FORMULAS B-1 THREAD TENSILE STRESS AREA B-2 THREAD SHEAR AREA B-3 LENGTH OF THREAD ENGAGEMENT |
| 63 | C LIMITING DIMENSIONS M PROFILE SCREW THREADS — INCH TRANSLATION |
| 74 | D BASIC DIMENSIONS FOR ISO SERIES METRIC SCREW THREADS FROM ISO 724 |
| 78 | E OVERTAPPED NUT THREAD CLASS 6AX |
| 80 | F INTERNAL THREAD ALLOWANCE FUNDAMENTAL DEVIATION TOLERANCE POSITION E |
