Taper pipe threads — detail
Gauge family 08 / 11

Taper pipe thread gauges, manufactured in Pune.

ISO 7-2BS 21JIS B0253Taper pipe 55° · ISO 7-R, BSPT, PT

Taper pipe thread gauges for pressure-tight joints: ISO 7-R, BSPT and PT threads with a 55° thread angle, manufactured to ISO 7-2, EN 10226, BS 21 and JIS B0253.

Standards
ISO 7-2 · BS 21
Also
EN 10226 · JIS B0253
Representative sizes & classes
ThreadAngleStandard
ISO 7-R55°ISO 7-2
BSPT55°BS 21
PT55°JIS B0253

GO gauge

Enters and passes the complete length of the thread, screwed by hand without excessive force.

NOT-GO gauge

May not enter more than two turns from either end, screwed by hand without excessive force.

Ground on our Matrix thread grinders and verified on TRIMOS H4 before every certificate is issued.

Common questions

Questions about Taper pipe threads

What is a taper pipe threads?

ISO 7-R / BSPT / PT taper pipe thread gauges for pressure-tight joints (55°).

Which standard does it follow?

Manufactured to ISO 7-2, BS 21, JIS B0253.

What range is available?

Available ranges: Standards ISO 7-2 · BS 21; Also EN 10226 · JIS B0253.

How does GO / NOT-GO acceptance work?

The GO member must enter and pass the complete length of the thread by hand, without excessive force. The NOT-GO member may not enter more than two turns from either end.

How do I request a quote?

Share the thread size and standard on our quote page and we will confirm class, availability and pricing within one business day.

Related

Other gauge families

“G” pipe gaugesTaper gauges (NPT)NPTF & ANPT gauges
Taper thread gaugesGauge manufacturer in IndiaOil & gasPumps & valves

Need taper pipe threads?

Share your thread, standard or drawing and get the right acceptance class, certified. We supply across India and take enquiries from outside India too, see where we supply.