General Data

• American Gage Design (AGD) Standardized Components
• Dynamics of Gaging
• Certification of Conformance vs. Long Form Certification
• Gage Care Maintenance and Storage
• GO does not GO and NOGO does GO
• Minor and Major Diameter Questions
• Pitch Diameter
• Ring Gage Adjusting
• Ring Gage Calibration by Direct Measurement
• Sealing Wax
• Set Plug Tolerances
• Set Plug Usage
• Terminology Related to Nuts and Bolts
• Thread Gaging Reference Guide
• Why Gages Grow

Specifications

• B1.1 (ANSI/ASME)
• B1.2 (ANSI/ASME)
• B1.3M (ANSI/ASME)
• B1.5 (ANSI/ASME)
• B1.7M (ANSI/ASME)
• B1.8 (ANSI/ASME)
• B1.9 (ANSI/ASME)
• B1.10 (ANSI/ASME)
• B1.11 (ANSI/ASME)
• B1.12 (ANSI/ASME)
• B1.13M (ANSI/ASME)
• B1.16M (ANSI/ASME)
• B1.18M (ANSI/ASME)
• B1.19M (ANSI/ASME)
• B1.20.1 (ANSI/ASME)
• B1.20.3 (ANSI/ASME)
• B1.20.4 (ANSI/ASME)
• B1.20.5 (ANSI/ASME)
• B1.20.6M (ANSI/ASME)
• B1.20.7 (ANSI/ASME)
• B1.21M (ANSI/ASME)
• B1.22M (ANSI/ASME)
• CGA V-1 (ANSI/ASME)
• SAE AS8879 (ANSI/ASME)
• SAE AS71051 (ANSI/ASME)
• BS-21
• BS-2779
• DIN-2999
• ISO-7
• ISO-228
• MIL-S-7742 and How It Relates to Thread Gages
• MIL-S-8879 and How It Relates to SAE AS8879
• Unified National Thread: ANSI vs. BS vs. ISO vs. JIS

UN Series Gages

• N vs. UN
• STI Gage Before or After Inserted
• STI Gage Tolerances
• Unified National Thread: ANSI vs. BS vs. ISO vs. JIS
• UN vs. UNC vs. UNF vs. UNEF vs. UNS
• UNJ vs. UN
• UNR vs. UN

Cylindrical or Plain Gages

• Gage Maker's Tolerance Calculator and Charts
• GO or NOGO or Master
• Nominal Size

Metric Series Gages

• Pitch Diameter Charts
• STI Gage Before or After Inserted
• STI Gage Tolerances

National Pipe Thread Gages

• Designations of American National Pipe Types
• Before Plate NPT Gages (National Pipe Taper)
• Gages: Pipe Plug
• Gages: Pipe Ring
• How to Use: NPT; ANPT; NPTF
• NPSF into NPSM (Dry Seal Combination)
• NPT vs. ANPT (Aeronautical National Pipe Taper)
• NPT vs. NGT (National Gas Taper)
• NPT vs. NPTF (National Pipe Taper Fuel)

Variable Style Gages

• MTG Catalog
• Snap Gages, Threaded, Knife Edge Style, Maintenance
• Starrett no longer sells thread comparators
• Starrett Technical Info
• Why Use Thread Snap Gages

Threaded Hole Centerline Location Gages

• Overview
  
• Flexible Style
  
• Solid Style
  
• Tapered Style
  
• Lead Lock Style
  
• Variable Style

British Standard Gages

• BS-2779
  
• BS-21
• BS-21 Rp into R (Dry Seal Combination)
• BS-21 System A vs. System B
• DIN-2999
• EN-10226
• ISO-7
• ISO-7 Rp into R (Dry Seal Combination)
• ISO-228
• ISO-228 Class A vs. Class B
• Rp vs. G
• Rs vs. G
• Full Form vs. Truncated or Modified
• ISO-7 vs. BS-21
• Designations of British Screw Thread Types
• DIN-240-1923 vs BS-84
• Whitworth Thread Form

Articles about threads mostly written by others

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

ACME Screw Threads

• The World of ACME Screw Threads
• Centralizing ACME Screw Threads
• General Purpose ACME Screw Threads
• Stub ACME Screw Threads