Spi 29-976-8 Class Zz Plus Plug Gage 0.976 in

Product Description

The SPI 29-976-8 is a Class ZZ Plus plug gage designed for precision bore and hole inspection in machining, manufacturing, and quality control environments. Built to a nominal diameter of 0.976 inches with a tolerance of 0.0002 inches, this gage provides reliable go/no-go verification of machined holes and bored features. The steel construction ensures durability under repeated use in shop-floor conditions. Machinists, toolroom technicians, and quality inspectors rely on Class ZZ plug gages for maintaining dimensional accuracy on production parts and inspection samples.

This plug gage is suited for verifying hole diameters in precision machined components across light manufacturing and heavy industry applications. It is used at inspection stations, on the shop floor, and in toolrooms where consistent, repeatable measurement is required. The 0.976-inch nominal size covers a common bore dimension found in shaft fits, bearing bores, and drilled or reamed hole inspection. The compact, single-piece design integrates easily into standard plug gage handles or holders.

Key Features

• Nominal measurement diameter of 0.976 inches for precise bore verification
• Class ZZ Plus tolerance of 0.0002 inches for dependable go/no-go inspection
• Steel construction for durability and resistance to wear in shop environments
• Compact single-piece gage member compatible with standard plug gage handles
• Lightweight at 0.2 pounds for easy handling during repeated inspection cycles

Compatibility

Designed as an OEM-style inspection tool for use with standard plug gage handles and holders accepting members in the 0.976-inch diameter range. Suitable for quality inspection programs requiring Class ZZ Plus dimensional verification.

Installation Notes

Plug gages are installed and used by machinists, toolroom technicians, and quality control inspectors. Before use, clean the gage member and the bore being measured to remove chips, coolant, and debris that can affect readings. Handle with clean dry hands or lint-free gloves to prevent corrosion from skin contact. Store in a protective case away from other tooling to prevent surface damage that could compromise dimensional accuracy.