Gauge

Gauge atau biasa disebut Go No Go adalah salah satu alat QC untuk mengecek bagus atau tidaknya suatu ulir/lubang. Untuk mengecek ulir dalam / luar dinamakan Plug / Ring Tread Gauge, dan untuk mengecek lubang saja dinamakan Plug / Ring Plain Gauge. Istilah Plug untuk mengecek lubang/ulir dalam (misalnya mur), dan istilah Ring untuk mengecek ulir luar (misalnya baut).
Berikut ini sedikit informasi mengenai OSG Gauge. Maaf masih dalam bahasa aslinya.

OSG gauges are high precision and quality instruments based on the thread grinding technology resulted by long years study. We support you with both threading operation and inspection.
Products:

Thread Limit Gauges LG: Plug Gauge, Ring gauge

Thread limit gauges consist of GO and NOT GO gauges. GO gauges should be screwed in and passed through by hand without difficulty. NOT GO gauges shouldn’t be screwed in by more than 2 revolutions.

Standard Thread Gauges SG

Standard thread gauges have correct thread standard angle and consist of plug and ring gauges. Theses gauges should never be forced, nor should they fit too loosely.

Pipe Thread Gauges LG(G/PF/PS)

Parallel pipe thread gauges are used as same as thread limit gauges. Taper pipe thread gauges with special notches are also available.

Plain Limit Gauges PG

These gauges are used to guarantee hole and shaft interchangeability. The GO and NOT GO ends of the gauge form one set and are used to standardize maximum and minimum tolerable measurements for holes and shafts.

Standard Gauges PG-M,RG-M

These gauges are used for measurement standardization of other gauges as well as controlling measurements of established comparative indicators. It should not be used directly on finished products or parts.

Source: http://www.osg-global.jp/products/gauge/