Description
The Insize 4121-1G58 American Standard Thread Ring Gauge is a precision GO thread gauge designed for accurate inspection and verification of external Unified threads. Manufactured to ANSI/ASME B1.2 standards, this high-precision ring gauge is ideal for machining, production inspection, and quality control applications requiring reliable thread checking.
Designed for Class 2A thread inspection, the gauge ensures consistent verification of thread accuracy and dimensional compliance in industrial and engineering environments.
Key Features & Benefits
- Precision GO thread ring gauge for external thread inspection
- Suitable for 1 1/4-8UN Unified threads
- Manufactured to ANSI/ASME B1.2 standard
- Class 2A thread tolerance
- Provides accurate and repeatable thread verification
- Ideal for machining, manufacturing, and inspection applications
- Supplied with manufacturer inspection certificate
- Durable hardened construction for long service life
- Designed for professional workshop and quality control use
Technical Specifications
- Part Number: 4121-1G58
- Thread Size: 1 1/4-8UN
- Gauge Type: GO Ring Gauge
- Thread Standard: ANSI/ASME B1.2
- Thread Class: 2A
- Application: External Unified thread inspection
- Inspection Certificate: Included
Insize thread ring gauges are manufactured for precision thread verification and are suitable for production environments, machining workshops, toolrooms, and quality assurance applications where accurate thread inspection is essential.
Well-designed, durable high-precision gauges suitable for industrial inspection and thread checking applications. Insize thread gauges deliver dependable accuracy and repeatability for professional measurement and quality control tasks.
Insize is globally recognised for manufacturing professional precision measuring instruments and inspection equipment trusted by machinists, engineers, and quality control professionals worldwide.
