TABLE OF CONTENTS THREADS AND THREADING Machinery's Handbook, 31st Edition
METRIC SCREW THREADS
BUTTRESS THREADS 2078 Threads of Buttress Form 2078 British Standard Buttress Threads 2078 Buttress Inch Screw Threads 2079 7°/45° Buttress Thread Form 2079 Pitch Combinations 2079 Basic Dimensions 2080 Buttress Thread Form 2081 Symbols and Form 2082 Buttress Thread Tolerances 2082 Allowances for Easy Assembly 2084 Buttress Thread Designations WHITWORTH THREADS 2086 British Standard Whitworth (BSW) and Fine (BSF) Threads 2086 Whitworth Standard Thread Form 2086 Tolerance Formulas 2087 Basic Dimensions PIPE AND HOSE THREADS 2089 Standard Pipe Threads 2089 Thread Designation and Notation 2089 Taper Pipe Threads 2090 Basic Dimensions 2091 Engagement Between External and Internal Taper Threads 2091 Tolerances on Thread Elements 2092 Limits on Crest and Root 2093 Pipe Couplings 2093 Railing Joint 2093 Straight Pipe Threads 2093 Mechanical Joints 2095 Dryseal Pipe Threads 2095 Limits on Crest and Root Truncation 2095 Types of Dryseal Pipe Thread 2097 Tap Drill Sizes 2097 Special Dryseal Threads 2098 Assembly Limitations for Special Combinations 2098 British Standard Pipe Threads 2098 Non-Pressure-Tight Joints 2099 Basic Sizes 2099 Pressure-Tight Joints 2100 Limits of Size
(Continued) 2044 2045 2045 2046
Basic Profile Tolerance System Fundamental Deviations Tolerance Grades, Positions, and Classes Lengths of Thread Engagements Design Profiles Designation Fundamental Deviation Formulas Crest Diameter Tolerance Formulas Diameter/Pitch Combinations Limits and Tolerances for
2047 2047 2047 2048 2049 2052 2052
Finished Uncoated Threads ACME SCREW THREADS 2054 American National Standard Acme Screw Threads 2054 General Purpose 2055 Acme Thread Form 2056 Abbreviations 2056 Designation 2056 Multiple Start 2057 Basic Dimensions 2057 Formulas for Diameters 2058 Limiting Dimensions 2060 Single-Start Screw Thread Data 2061 Pitch Diameter Allowances 2061 Centralizing 2062 Pitch Diameter Tolerances 2064 Basic Dimensions 2066 Formulas for Diameters 2066 Designation 2067 Limiting Dimensions 2069 Screw Thread Data 2070 Pitch Diameter Allowances and Tolerances 2072 Minor Diameter Centralizing 2072 Stub Acme Threads 2073 Basic Dimensions 2073 Formulas for Diameters 2074 Limiting Dimensions 2075 Alternate Stub Acme Threads 2075 Former 60-Degree Stub Thread 2077 Square Thread
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