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Technical Information
  1. General Data
  2. Specifications
  3. UN UNS UNC UNF UNEF Series Gages
  4. Cylindrical Plain Gages
  5. Metric Series Gages
  6. National Pipe Thread Gages
  7. Variable Style Gages
  8. Threaded Hole Centerline Location Gages
  9. British Standard Gages
  10. Medical Luer Fittings Gages
  11. Step Pin Gage Design Page
  12. Articles about threads mostly written by others
  13. Thread Data Charts
  14. ACME Screw Threads
  15. API American Petroleum Institute

    General Data

    1. American Gage Design (AGD) Standardized Components
    2. Dynamics of Gauging
    3. Calibration/Recalibration Frequency Intervals
    4. Certification of Conformance vs. Long Form Certification
    5. Deep Hole Thread Measurement
    6. Gage Care Maintenance and Storage
    7. GO does not GO and NOGO does GO
    8. Minor and Major Diameter Questions
    9. Pitch Diameter
    10. Questions with no specific category
    11. Ring Gage Adjusting
    12. Ring Gage Calibration by Direct Measurement
    13. Ring Gage Solid vs Adjustable Styles
    14. Sealing Wax
    15. Set Plug Tolerances
    16. Set Plug Usage
    17. Terminology Related to Nuts and Bolts
    18. Thread Gauging Reference Guide
    19. User's Manuals for Variable Thread Measurement Systems
    20. Why Gages Grow
    21. Out of Business and/or Sold Screw Thread Gage Makers

    Specifications

    1. Authorized Resellers List
    2. A-A 59158 (STI) Unified Screw Thread Inserts
    3. AS8879 (ANSI/ASME/SAE) J-series
    4. AS71051 (ANSI/ASME/SAE) ANPT-series
    5. B1.1 (ANSI/ASME) UN-series part threads
    6. B1.2 (ANSI/ASME) UN-series thread gages
    7. B1.5 (ANSI/ASME) ACME Screw Threads
    8. B1.7M (ANSI/ASME) Screw thread nomenclature and letter symbols
    9. B1.8 (ANSI/ASME) Stub ACME Screw Threads
    10. B1.9 (ANSI/ASME) Buttress Screw Threads
    11. B1.10 (ANSI/ASME) Miniature Screw Threads
    12. B1.11 (ANSI/ASME) Microscope Objective Screw Threads
    13. B1.12 (ANSI/ASME) Interference-Fit Screw Threads
    14. B1.13M (ANSI/ASME) M-series Metric Screw Threads
    15. B1.16M (ANSI/ASME) M-series Metric Screw Thread Gages
    16. B1.20.1 (ANSI/ASME) American General Purpose Pipe Screw Threads - Parts and Gages
    17. B1.20.2M (ANSI/ASME) American General Purpose Pipe Screw Threads - Parts and Gauges (metric version)
    18. B1.20.3 (ANSI/ASME) Dry Seal Pipe Screw Threads
    19. B1.20.4 (ANSI/ASME) Dry Seal Pipe Screw Threads (metric version)
    20. B1.20.5 (ANSI/ASME) Dry Seal Pipe Screw Thread Gages
    21. B1.20.6M (ANSI/ASME) Dry Seal Pipe Screw Thread Gages (metric version)
    22. B1.20.7 (ANSI/ASME) Hose Connection Screw Threads
    23. B1.21M (ANSI/ASME) MJ-series Screw Threads
    24. B1.22M (ANSI/ASME) MJ-series Screw Thread Gages
    25. BS-21 R-series British Standard Pipe Tapered (BSPT)
    26. BS-93 BA-series British Association Screw Threads
    27. BS-919-3 Screw gauge limits and tolerances - Part 3: Specification for gauges for screw threads of ISO metric form
    28. BS-1580-1 Unified Screw Threads; Part 1; 1/4" and larger
    29. BS-1580-2 obsolete
    30. BS-1580-3 Unified Screw Threads; Part 3; smaller than 1/4"
    31. BS-2779 obsolete
    32. C81.61 (ANSI/ANSLG) Electric Lamp Bases
    33. C81.62 (ANSI/ANSLG) Electric Lamp Holders
    34. C81.63 (ANSI/ANSLG) Electric Lamp Bases and Lampholders
    35. C81.64 (ANSI/ANSLG) Guidelines and General Information for Electric Lamp Bases, Lampholders, and Gauges
    36. DIN 405 Rd-series Knuckle Screw Threads
    37. DIN 420 Whitworth Screw Threads (same as BS-84)
    38. DIN 513 S-Series 3°/30° Metric Buttress Screw Threads
    39. DIN-2999 withdrawn
    40. DIN-6063-1 Threads, mainly for plastic containers - Part 1: Buttress threads, dimensions
    41. DIN 40430 Pg-series Steel Conduit Thread
    42. EN 1707 Luer Connections for Needles and Syringes
    43. EN 10226-1 British Standard Pipe (R-external to Rp-internal)
    44. EN 10226-2 British Standard Pipe (R-external to Rc-internal)
    45. EN 10226-3 R-series British Standard Pipe Gages
    46. EN 13544-2 Respiratory Therapy Tubing and Connectors
    47. EN 20241 Steel Threaded Pipe Fittings DN6 to DN150
    48. EN 20594-1 Luer Connections for Needles and Syringes
    49. ISO-7-1 R-series British Standard Pipe Screw Threads
    50. ISO-7-2 R-series British Standard Pipe Screw Thread Gages
    51. ISO-228 G-series British Standard Pipe Screw Threads
    52. ISO-594/1 Luer Connections for Needles and Syringes - Cone
    53. ISO-594/2 Luer Connections for Needles and Syringes - Threads
    54. ISO-2853 Stainless Steel Threaded Couplings for the Food Industry
    55. ISO-5145 Cylinder Valve Outlets for Gases and Gas Mixtures
    56. ISO-5356-1 Anesthetic and Respiratory Equipment – Conical Connectors
    57. ISO-8185 Humidifiers for Medical Use
    58. ISO-8638 Cardiovascular Implants and Extracorporeal Systems
    59. ISO-18250-1 Medical Reservoirs
    60. ISO-18250-3 Enteral Reservoirs
    61. ISO-80369-1 Medical Small-Bore Connectors
    62. ISO-80369-3 Enteral Connectors
    63. ISO-80369-6 Neuraxial Connectors
    64. ISO-80369-7 Connectors with 6% (Luer) taper for intravascular or hypodermic applications
    65. ISO-80369-20 Common Test Methods for ISO 80369
    66. MIL-S-7742 and How It Relates to Thread Gages
    67. MIL-S-8879 obsolete J-series
    68. MIL-T-21309 obsolete Screw Thread Inserts (STI)
    69. SAE Numbering Paradigm
    70. Unified National Thread: ANSI vs. BS vs. ISO vs. JIS
    71. V-1 (ANSI/ASME/CGA) Compressed Gas Cylinder Valve Outlet and Inlet Connections

    UN Series Gages

    1. 2AG Class-of-Fit
    2. 3BG Class-of-Fit
    3. Controlled Root Radius on External Screw Threads
    4. Controlled Root Radius on Internal Screw Threads
    5. N vs. UN
    6. STI Gage Before or After Inserted
    7. STI Gage Tolerances
    8. Unified National Thread: ANSI vs. BS vs. ISO vs. JIS
    9. UN vs. UNC vs. UNF vs. UNEF vs. UNS
    10. UNJ vs. UN
    11. UNR vs. UN

    Cylindrical or Plain Gages

    1. Gage Maker's Tolerance Calculator and Charts
    2. GO or NOGO or Master
    3. Nominal Size

Metric Series Gages

  1. Pitch Diameter Charts
  2. STI Gage Before or After Inserted
  3. STI Gage Tolerances

National Pipe Thread Gages

  1. Designations of American National Pipe Types
  2. Before Plate NPT Gages (National Pipe Taper)
  3. Calibrate NPT-L1 Work Plug Gage using NPT Master Ring Gage
  4. Calibrate NPT-L1 Work Ring Gage using NPT Master Plug Gage
  5. Calibrate NPTF-L1 Work Plug Gage using NPTF Master Ring Gage
  6. Gages: Pipe Plug
  7. Gages: Pipe Ring
  8. How many steps should a Pipe Gage have?
  9. How to Use: NPT; ANPT; NPTF
  10. NPSF into NPSM (Dry Seal Combination)
  11. NPT vs. ANPT (Aeronautical National Pipe Taper)
  12. NPT vs. NGT (National Gas Taper)
  13. NPT vs. NPTF (National Pipe Taper Fuel)

Variable Style Gages

  1. MTG Catalog
  2. Snap Gages, Threaded, Knife Edge Style, Maintenance
  3. Starrett no longer sells thread comparators
  4. Starrett Technical Info
  5. User's Manuals for Variable Thread Measurement Systems
  6. Why Use Thread Snap Gages

Threaded Hole Centerline Location Gages

  1. Overview
  2. Flexible Style
  3. Solid Style
  4. Tapered Style
  5. Lead Lock Style
  6. Variable Style

British Standard Gages

  1. BS-2779
  2. BS-21
  3. BS-21 Rp into R (Dry Seal Combination)
  4. BS-21 System A vs. System B
  5. DIN-2999
  6. EN-10226
  7. ISO-7
  8. ISO-7 Rp into R (Dry Seal Combination)
  9. ISO-228
  10. ISO-228 Class A vs. Class B
  11. Rp vs. G
  12. Rs vs. G
  13. Full Form vs. Truncated or Modified
  14. ISO-7 vs. BS-21
  15. Designations of British Screw Thread Types
  16. DIN-240-1923 vs BS-84
  17. Whitworth Thread Form

Articles about threads mostly written by others

  1. Hot glue, the new sealing wax.
  2. JIS (Japanese Industrial Standard) Screw Thread Specifications
  3. Are You Beating Your Gages to Death?
  4. Screw Thread Design
  5. Cut costs on UNR threads.

ACME Screw Threads

  1. The World of ACME Screw Threads
  2. Centralizing ACME Screw Threads
  3. General Purpose ACME Screw Threads
  4. Stub ACME Screw Threads
API American Petroleum Institute
  1. API Home Page
  2. BTC Buttress Casing per API Spec 5B
  3. CSG Round Casing per API Spec 5B
  4. LP Line Pipe per API Spec 5B
  5. NC Numbered Connections per API Spec 7-2
  6. NU Non-Upset Tubing per API Spec 5B
  7. TBG (EU/EUE/EUT) External Upset Tubing per API Spec 5

Comments:
Original Posting: 1/10/1999
Last Revision: 2/2/2016
Error corrections in, or comments about, the above data can be sent to: gageguy@gagecrib.com

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