Plug Gauges (also known as Go/No-Go Gauges) are precision measuring tools used to check the dimensional accuracy and tolerance of internal holes in machined parts. Manufactured from hardened tool steel or carbide, plug gauges are essential in quality control processes to verify that holes conform to exact specifications.

✅ Key Features:

• High Accuracy Measurement
  Ensures exact checking of hole sizes, fit, and roundness as per international standards (ISO, DIN, ANSI).
• Go & No-Go Ends
  Dual-ended design: one end (Go) confirms the minimum hole size, the other (No-Go) confirms the maximum limit.
• Robust Material Options
  Available in High-Speed Steel (HSS), EN-31, and solid/hardened carbide for extended wear resistance.
• Custom & Standard Sizes
  Range from 0.5 mm to 150 mm with tolerance classes including Class X, XX, or custom tolerances as per client drawings.
• Ergonomic Design
  Precision knurled handles or fixed holders for easy grip and repetitive use in production environments.

🛠 Applications:

• Hole size verification in precision machining
• Automotive, aerospace, defense, and manufacturing industries
• Ideal for inspection labs, QC departments, and tool rooms
• Used for both manual and automated checking stations

🌟 Benefits:

🔹 Assured Dimensional Tolerance – Verifies bore diameters with ±0.001 mm accuracy
🔹 Quick Pass/Fail Inspection – Eliminates guesswork with Go/No-Go validation
🔹 Long-Lasting & Durable – Withstands repeated use in high-volume production
🔹 Minimal Skill Requirement – Simple and effective for any operator to use

🔧 Types of Plug Gauges:

Air Plug Gauges (for pneumatic gauging systems)

Cylindrical Plug Gauge

Taper Plug Gauge

Thread Plug Gauge (for internal thread inspection)

Reversible / Fixed / Progressive Plug Gauge