GO/NO-GO Plug, Ring & Snap Gauges
Fixed-Limit Gauges for Fast, Unambiguous Tolerance Verification
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SPT Metrology manufactures GO/NO-GO Plug, Ring, and Snap Gauges built to give inspectors an instant, unambiguous accept/reject decision on bore, shaft, and thread dimensions, without needing to read, interpret, or record a numerical value for every part. As a trusted Go-No-Go Plug, Ring, Snap Gauges Manufacturer, we supply automotive, machining, and general engineering industries with fixed-limit gauges built to the exact tolerance class each part requires.
Why Fixed-Limit Gauging Still Beats Digital Measurement for Volume Work
A digital instrument gives you a precise number; a GO/NO-GO gauge gives you a decision. For high-volume inspection where the question is simply 'does this part meet spec,' fixed-limit gauging is faster, removes reading interpretation entirely, and doesn't depend on operator skill with a digital instrument: the part either accepts the GO end and rejects the NO GO end, or it doesn't.
Four Gauge Types, Each Built for Its Feature
Plug gauges check bore diameters against upper and lower tolerance limits in a single tool. Thread plug gauges verify internal thread pitch diameter and form against GO/NO-GO limits specific to the thread class. Ring gauges check external diameters and thread forms the same way, from the outside. Snap gauges span a range and check external dimensions quickly across multiple part sizes without needing a dedicated gauge per diameter.
Manufactured to Exact Tolerance Class
Every gauge is machined and marked to the specific tolerance class it's built for, H7, or whichever class your component drawing specifies, because a fixed-limit gauge is only useful if its own limits are precisely where the drawing says they should be. We manufacture to your exact specification rather than offering only standard catalog sizes.
Where They're Used
GO/NO-GO gauges from SPT support incoming inspection, in-process production checks, and final QC verification across any application where a fast, reliable pass/fail decision on bore, shaft, or thread dimensions matters more than a recorded numerical value.
Why Manufacturers Choose SPT
As a Go-No-Go Plug, Ring, Snap Gauges Supplier trusted across Tamil Nadu and beyond, we manufacture and mark every gauge to its exact tolerance class, because a fixed-limit gauge that's slightly off its stated limits doesn't just fail occasionally: it fails silently, passing or rejecting parts it shouldn't.
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Go-No-Go Plug, Ring, Snap Gauges Manufacturers Across India.
From our facilities in Chennai and Dharmapuri, we manufacture and supply go-no-go plug, ring, and snap gauges to automotive, machining, and general engineering industries nationwide.