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. Pg Steel Conduit Thread per DIN 40430
14. Thread Data Charts
15. ACME Screw Threads
16. API American Petroleum Institute

    General Data

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

    Specifications

    1. Authorized Resellers List
    2. AS8879 (ANSI/ASME/SAE)
    3. AS71051 (ANSI/ASME/SAE)
    4. B1.1 (ANSI/ASME)
    5. B1.2 (ANSI/ASME)
    6. B1.3M (ANSI/ASME)
    7. B1.5 (ANSI/ASME)
    8. B1.7M (ANSI/ASME)
    9. B1.8 (ANSI/ASME)
    10. B1.9 (ANSI/ASME)
    11. B1.10 (ANSI/ASME)
    12. B1.11 (ANSI/ASME)
    13. B1.12 (ANSI/ASME)
    14. B1.13M (ANSI/ASME)
    15. B1.16M (ANSI/ASME)
    16. B1.18M (ANSI/ASME)
    17. B1.19M (ANSI/ASME)
    18. B1.20.1 (ANSI/ASME)
    19. B1.20.3 (ANSI/ASME)
    20. B1.20.4 (ANSI/ASME)
    21. B1.20.5 (ANSI/ASME)
    22. B1.20.6M (ANSI/ASME)
    23. B1.20.7 (ANSI/ASME)
    24. B1.21M (ANSI/ASME)
    25. B1.22M (ANSI/ASME)
    26. BS-21
    27. BS-93
    28. BS-2779
    29. C81.61 (ANSI/ANSLG)
    30. C81.62 (ANSI/ANSLG)
    31. C81.63 (ANSI/ANSLG)
    32. C81.64 (ANSI/ANSLG)
    33. DIN 405
    34. DIN 420
    35. DIN 513
    36. DIN-2999
    37. EN 1707
    38. EN 10226-1
    39. EN 10226-1
    40. EN 10226-2
    41. EN 10226-3
    42. EN 20241
    43. EN 20594-1
    44. ISO-7-1
    45. ISO-7-2
    46. ISO-228
    47. ISO-594/1
    48. ISO-594/2
    49. ISO-5145
    50. ISO-5356-1
    51. ISO-8185
    52. ISO-8638
    53. ISO-80369-1
    54. MIL-S-7742 and How It Relates to Thread Gages
    55. MIL-S-8879 and How It Relates to SAE AS8879
    56. SAE Numbering Paradigm
    57. Unified National Thread: ANSI vs. BS vs. ISO vs. JIS
    58. V-1 (ANSI/ASME/CGA)

    UN Series Gages

    1. 3BG Class-of-Fit
    2. Controlled Root Radius on External Screw Threads
    3. Controlled Root Radius on Internal Screw Threads
    4. N vs. UN
    5. STI Gage Before or After Inserted
    6. STI Gage Tolerances
    7. Unified National Thread: ANSI vs. BS vs. ISO vs. JIS
    8. UN vs. UNC vs. UNF vs. UNEF vs. UNS
    9. UNJ vs. UN
    10. 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 to Use: NPT; ANPT; NPTF
9. NPSF into NPSM (Dry Seal Combination)
10. NPT vs. ANPT (Aeronautical National Pipe Taper)
11. NPT vs. NGT (National Gas Taper)
12. 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. 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: 4/8/2013
Error corrections in, or comments about, the above data can be sent to: gageguy@gagecrib.com