Spi 34-416-8 Plug Thread Gage 5/8-24 3B Double End

Product Description

The SPI 34-416-8 is a double-end plug thread gage designed to verify internal thread conformance to the 5/8-24 thread specification at 3B class tolerance. One end carries the Go member; the opposite end carries the No Go member. The Go end confirms the thread allows proper mating engagement, while the No Go end confirms the thread does not exceed the maximum material condition. A size 3 handle is included. The gage ships with NIST-traceable certification documentation, making it suitable for quality-controlled manufacturing and inspection environments. Installation is performed by metrologists, machinists, and quality control technicians in production or inspection settings.

This gage is used wherever internal 5/8-24 threads must be verified against ANSI/ASME tolerance requirements at 3B class fit. Typical applications include thread inspection on hydraulic fittings, precision mechanical assemblies, and manufactured components requiring documented thread conformance. The double-end configuration eliminates the need for two separate gages, keeping inspection workflow efficient on the shop floor or at an inspection station. NIST traceability supports ISO 9001 and other quality management documentation requirements.

Key Features

• Double-end design combines Go and No Go members in a single tool
• Verifies 5/8-24 internal threads to 3B class tolerance
• NIST-traceable traceability certification included for documented quality programs
• Size 3 handle included — no separate handle purchase required
• Steel construction for durability in production inspection use

Compatibility

Designed for inspection of internal 5/8-24 unified threads manufactured to 3B class tolerance per applicable ASME thread standards.

Installation Notes

Thread gages are handled by trained quality control personnel or machinists following established inspection procedures. Store gages in a protective case away from abrasive surfaces to preserve gage member accuracy. Do not force the Go or No Go members into threads — apply hand pressure only. Gages should be periodically re-calibrated per your quality management system requirements to maintain traceability.