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ASME B1.12 Class 5 Interference-Fit Thread, 1987
- Foreword
- Standards Committee Roster
- Contents
- 1 General [Go to Page]
- 1.1 Scope
- 1.2 Field of Application
- 1.3 Reference Documents
- 1.4 Acceptability
- 1.5 Reference Temperature
- 1.6 Units of Measure
- 1.7 Federal Government Use
- 2 Terminology [Go to Page]
- 2.1 General
- 2.2 Additional Definitions
- 3 Thread Designations [Go to Page]
- 3.1 Class 5 External Thread
- 3.2 Class 5 Internal Thread
- 4 Screw Thread Profile [Go to Page]
- 4.1 Basic Profile
- 4.2 Design Profiles
- 4.3 Maximum and Minimum Interference
- 4.4 Formulas
- 5 Screw Thread Series [Go to Page]
- 5.1 Standard Series
- 5.2 Fine Pitch Series
- 6 Screw Thread Class
- 7 Screw Thread Allowances and Tolerances [Go to Page]
- 7.1 Allowances
- 7.2 Tolerances
- 8 Standard Series Threads and Formulas for Limits of Size [Go to Page]
- 8.1 Basic Dimensions for Standard Series Threads
- 9 Thread Characteristics [Go to Page]
- 9.1 Limits of Size
- 9.2 Pitch Diameter Limits
- 9.3 Major Diameter Limits
- 9.4 Minor Diameter Limits
- 9.5 Other Screw Thread Characteristics
- 9.6 Length of Engagement
- 10 Notes on Product Design and Application [Go to Page]
- 10.1 Conditions of Usage
- 10.2 External Threaded Products
- 10.3 Internal Threaded Products
- 10.4 Lead and Angle Variations
- 10.5 Cavity Space for Interference Material
- 10.6 Thread Axis Position
- 10.7 Surface Roughness
- 10.8 Lubrication
- 10.9 Driving Speed
- 10.10 Relation of Driving Torque to Length of Engagement
- 10.11 Breakloose Torques
- 11 Product Screw Thread Acceptability [Go to Page]
- 11.1 Gaging Systems
- 11.2 Product Thread Characteristics Conformance Requirements Over Length of Engagement for Gaging Systems 22 and 23
- 12 Torque
- Figures [Go to Page]
- 1 Basic Thread Profile
- 2 Design Profile for External NC-5 HF/CSF/ONF Thread
- 3 Design Profile for Internal NC-5 IF/INF Thread
- 4 Maximum and Minimum Interference
- 5 Illustration of LE, Ts, Tolerances of Ts, and Th Required for Assembled Threads
- Tables [Go to Page]
- 1 Standard NC-5 Thread Series
- 2 Allowances for Coarse Thread Series
- 3 Tolerances for Pitch Diameter, Major Diameter, and Minor Diameter for Coarse Thread Series
- 4 Basic Dimensions for Coarse Thread Series
- 5 Thread Constants
- 6 External Thread Dimensions for Class 5 Standard
- 7 Internal Thread Dimensions for Class 5 Standard
- 8 Interferences, Engagement Lengths, and Torques for Class 5 Standard
- 9 Maximum Allowable Variations in Lead and Maximum Equivalent Change in Functional Diameter
- 10 Maximum Allowable Variation in 30 deg. Basic Half-Angle of External and Internal Screw Threads
- 11 Working Gages
- 12 Setting Gages
- Appendices [Go to Page]
- A Obsolete Tentative Standard and Alternate Standard for Class 5 Interference-Fit Thread [Go to Page]
- A1 Introduction
- A2 Tentative Standard
- A3 Alternate Standard
- B Specifications for Elastic Interference-Fit Thread [Go to Page]
- B1 Introduction
- B2 Thread Designation
- B3 External and Internal Threads Compared to NC-5
- B4 Application Practice for New and Reworked External and Internal Threads
- B5 Gaging
- C Class 5 Modified Specifications for Plastic Flow Interference-Fit Thread with Addition of K Monel External Thread [Go to Page]
- C1 Introduction
- C2 Additions to Thread Designation Letters
- C3 External and Internal Threads Compared to ASME/ANSI B1.12 Class 5 Threads
- C4 Torque and Length of Engagement
- C5 Application Practice for New and Reworked External and Internal Threads
- C6 Gaging
- D Comparison of Interference Metal for the Thread Assemblies Tabulated in the Appendices With the American National [Go to Page]
- D1 Explanation for Table D1
- D2 Formulas for Volume of Interference Metal per Turn
- Figures [Go to Page]
- A1 Illustration of Tolerances, Allowances, and Crest Clearances for Tentative and Alternate Class 5 Fit for Threaded Stu
- A2 Illustration of Loosest Condition for Tentative Class 5 Wrench Fit for Threaded Studs, 1/2 in., 13 Threads, Set in Ha
- A3 Illustration of Tightest Condition for Tentative Class 5 Wrench Fit for Threaded Studs, 1/2 in., 13 Threads, Set in H
- A4 Illustration of Loosest Condition for Alternate Class 5 Fit for Threaded Studs, 1/2 in., 13 Threads, Set in Hard Mate
- A5 Illustration of Tightest Condition for Alternate Class 5 Fit for Threaded Studs, 1/2 in., 13 Threads, Set in Hard Mat
- Tables [Go to Page]
- A1 Tentative Class 5 Wrench Fit for Threaded Studs, Allowances and Tolerances for Studs and Tapped Holes, Coarse Thread
- A2 Tentative Class 5 Wrench Fit for Threaded Studs, Allowances and Tolerances for Studs and Tapped Holes, Fine Threaded
- A3 Limiting Dimensions for Tentative Class 5 Wrench Fit for American National Coarse Thread Series, Steel Studs Set in
- A4 Limiting Dimensions for Tentative Class 5 Wrench Fit for American National Fine Thread Series, Steel Studs Set in
- A5 Alternate Class 5 Fit for Threaded Studs, Allowances and Tolerances for Studs and Tapped Holes, Coarse Threaded Stud
- A6 Alternate Class 5 Fit for Threaded Studs, Allowances and Tolerances for Studs and Tapped Holes, Fine Threaded Studs
- A7 Limiting Dimensions for Alternate Class 5 Fit, American National Coarse Thread Series, Steel Studs Set in Hard Mater
- A8 Limiting Dimensions for Alternate Class 5 Fit, American National Fine Thread Series, Steel Studs Set in Hard Materia
- A9 Limiting Dimensions of Setting Plug and Thread Working Gages and Plain Diameter Gages for Alternate Class 5 Fit Thre
- A10 Limiting Dimensions of Thread Working Gages and Plain Diameter Gages for Alternate Class 5 Fit Tapped Holes, Americ
- A11 Limiting Dimensions of Setting Plug and Thread Working Gages and Plain Diameter Gages for Alternate Class 5 Fit
- A12 Limiting Dimensions of Thread Working Gages and Plain Diameter Gages for Alternate Class 5 Fit Tapped Holes, Americ
- B1 External Thread Dimensions for NC-5 HFM
- B2 Internal Thread Dimensions for NC-5 IFM
- B3 Engagement Length, Hole Depth, Interference, and Torque for NC-5 HFM and NC-5 IFM
- B4 Setting Gages for NC-5 HFM and NC-5 IFM
- C1 External Thread Dimensions for Class 5 Modified for Nickel-Copper-Aluminium (K Monel)
- C2 External Thread Dimensions for Class 5 Modified for Greater Cavity Space
- C3 Internal Thread Dimensions for Class 5 Modified
- C4 Interference on Pitch Diameter for Class 5 Modified
- D1 Thread Assemblies Compared by Percentage of Interference Metal per Turn [Go to Page]
