Spi 19-735-0 Class Zz Minus Plug Pin Gage 0.735 in

Product Description

The SPI 19-735-0 is a Class ZZ minus plug pin gage machined from steel, used to verify that a hole or bore meets minimum dimensional tolerance requirements. At 0.735 inches in diameter with a tolerance of 0.0002 inches, this pin gage provides reliable go/no-go inspection for quality control operations in machine shops, manufacturing facilities, and tool rooms. Class ZZ designates the least precise class of pin gage, appropriate for inspection of commercial-grade work where ultra-tight tolerances are not required. The minus designation means the gage is manufactured to the low side of the nominal diameter, consistent with go-gage practice.

This pin gage is suited for use in dimensional inspection of machined bores, drilled holes, and other cylindrical features in production and job-shop environments. It is commonly used by machinists, quality control technicians, and metrologists performing incoming inspection, in-process checks, or final part verification. The compact, hand-held form factor allows use at the machine, on the inspection bench, or at a receiving dock without additional fixturing.

Key Features

• Class ZZ tolerance class for commercial-grade inspection applications
• Minus designation confirms go-gage configuration, checking minimum hole size
• 0.0002 inches manufactured tolerance ensures consistent measurement repeatability
• Steel construction provides durability for repeated shop-floor use
• 0.735 inches nominal diameter for direct bore verification at that size

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in any go/no-go inspection process requiring verification of a 0.735-inch nominal bore diameter.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils and to maintain dimensional accuracy. Before use, clean the gage and the bore being inspected to remove chips, coolant, and debris that could cause false readings. Store the gage in a protective case away from other tooling to prevent nicks or surface damage that would affect accuracy. Periodic recalibration against a certified master is recommended to confirm ongoing dimensional integrity.