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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. Certification of Conformance vs. Long Form Certification
    4. Deep Hole Thread Measurement
    5. Gage Care Maintenance and Storage
    6. GO does not GO and NOGO does GO
    7. Minor and Major Diameter Questions
    8. Pitch Diameter
    9. Questions with no specific category
    10. Ring Gage Adjusting
    11. Ring Gage Calibration by Direct Measurement
    12. Sealing Wax
    13. Set Plug Tolerances
    14. Set Plug Usage
    15. Terminology Related to Nuts and Bolts
    16. Thread Gauging Reference Guide
    17. User's Manuals for Variable Thread Measurement Systems
    18. Why Gages Grow

    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 Pipe Screw Threads
    17. B1.20.3 (ANSI/ASME) Dry Seal Pipe Screw Threads
    18. B1.20.4 (ANSI/ASME) Dry Seal Pipe Screw Threads (metric version)
    19. B1.20.5 (ANSI/ASME) Dry Seal Pipe Screw Thread Gages
    20. B1.20.6M (ANSI/ASME) Dry Seal Pipe Screw Thread Gages (metric version)
    21. B1.20.7 (ANSI/ASME) Hose Connection Screw Threads
    22. B1.21M (ANSI/ASME) MJ-series Screw Threads
    23. B1.22M (ANSI/ASME) MJ-series Screw Thread Gages
    24. BS-21 R-series British Standard Pipe Tapered (BSPT)
    25. BS-93 BA-series British Association Screw Threads
    26. BS-919-3 Screw gauge limits and tolerances - Part 3: Specification for gauges for screw threads of ISO metric form
    27. BS-1580-1 Unified Screw Threads; Part 1; 1/4" and larger
    28. BS-1580-2 obsolete
    29. BS-1580-3 Unified Screw Threads; Part 3; smaller than 1/4"
    30. BS-2779 obsolete
    31. C81.61 (ANSI/ANSLG) Electric Lamp Bases
    32. C81.62 (ANSI/ANSLG) Electric Lamp Holders
    33. C81.63 (ANSI/ANSLG) Electric Lamp Bases and Lampholders
    34. C81.64 (ANSI/ANSLG) Guidelines and General Information for Electric Lamp Bases, Lampholders, and Gauges
    35. DIN 405 Rd-series Knuckle Screw Threads
    36. DIN 420 Whitworth Screw Threads (same as BS-84)
    37. DIN 513 S-Series 3°/30° Metric Buttress Screw Threads
    38. DIN-2999 withdrawn
    39. DIN 40430 Pg-series Steel Conduit Thread
    40. EN 1707 Luer Connections for Needles and Syringes
    41. EN 10226-1 British Standard Pipe (R-external to Rp-internal)
    42. EN 10226-2 British Standard Pipe (R-external to Rc-internal)
    43. EN 10226-3 R-series British Standard Pipe Gages
    44. EN 20241 Steel Threaded Pipe Fittings DN6 to DN150
    45. EN 20594-1 Luer Connections for Needles and Syringes
    46. ISO-7-1 R-series British Standard Pipe Screw Threads
    47. ISO-7-2 R-series British Standard Pipe Screw Thread Gages
    48. ISO-228 G-series British Standard Pipe Screw Threads
    49. ISO-594/1 Luer Connections for Needles and Syringes - Cone
    50. ISO-594/2 Luer Connections for Needles and Syringes - Threads
    51. ISO-5145 Cylinder Valve Outlets for Gases and Gas Mixtures
    52. ISO-5356-1 Anesthetic and Respiratory Equipment – Conical Connectors
    53. ISO-8185 Humidifiers for Medical Use
    54. ISO-8638 Cardiovascular Implants and Extracorporeal Systems
    55. ISO-18250-1 Medical Reservoirs
    56. ISO-18250-3 Enteral Reservoirs
    57. ISO-80369-1 Medical Small-Bore Connectors
    58. ISO-80369-3 Enteral Connectors
    59. ISO-80369-6 Neuraxial Connectors
    60. ISO-80369-7 Connectors with 6% (Luer) taper for intravascular or hypodermic applications
    61. ISO-80369-20 Common Test Methods for ISO 80369
    62. MIL-S-7742 and How It Relates to Thread Gages
    63. MIL-S-8879 obsolete J-series
    64. MIL-T-21309 obsolete Screw Thread Inserts (STI)
    65. SAE Numbering Paradigm
    66. Unified National Thread: ANSI vs. BS vs. ISO vs. JIS
    67. 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: 1999
Last Revision: 2/24/2015
Error corrections in, or comments about, the above data can be sent to: gageguy@gagecrib.com

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