ISO 7.2 Gauge No.3
This gauge is a parallel full form threaded ring gauge and is suitable for checking the minor diameter and pitch diameter at the gauge plane of taper external (R) threads. The gauge incorporates a step equal to the total tolerance (AS ISO 7.2 – 2008 p8).
All of our gauges are made from hardened tool steel to ensure long life and are supplied with a manufacturers certificate of conformance (COC).
Product options
NATA Calibration – ISO 17025
Storage case for a single gauge or for a gauge set
Full range of gauges for ISO 7.2 available
Applicable standards
AS ISO 7.2 – 2008 Pipe threads where pressure-tight joints are made on the threads. Note previous standard was AS 1722 Part 1 – 1975, also previously referred to a BSPT.
Why this product is used
Tapered screw ring gauges are an efficient way to check external thread conformance. Simply screw the gauge into the part by hand until it stops. If the end face of the part is between the max. and min. steps this condition indicates a conforming part.
Downloads
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Customisation
Customisation is offered on most gauges. We can add a new feature to a standard gauge, manufacture a revised design based on a standard gauge, or design a new gauge to suit your application.
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Delivery
We offer express or economy delivery and can send products to local, interstate and overseas locations. We’re also happy to use your own delivery supplier.
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Manufacturing
We are an Australian business located in Airport West Victoria. Quality is a priority and we have ISO 9001 and ISO 17025 management systems in place.
FAQs
Why is the No.3 gauge described as parallel full form?
The parallel form of the gauge simulates a parallel female fitting. No.3 gauges are parallel and have step limits similar to the previous AS 1722 tapered ring gauge. No.3 gauges are used the same way as a tapered gauge, screw the gauge into the part by hand until it stops. If the end face of the part is between the max. and min. steps this condition indicates a conforming part.
Is BSPT still a current standard?
No, the current standard is ISO 7.
BSPT was replaced by AS1722 Part 1, then AS1722 Part 1 was replaced by ISO 7.
Is AS1722 Part 1 the same as ISO 7?
It is very close but there are some variations, call us for more detail.
How often do I need to calibrate my gauge?
There is no fixed time, calibration frequency is based on how often the gauge is used and the conditions that the gauge is exposed to. Frequent use and abrasive materials will require more frequent calibration, low use in a clean environment will allow less frequent calibration. Usually the user determines the calibration frequency.
