Trapezoidal gauges — detail
Gauge family 07 / 11

Trapezoidal thread gauges, manufactured in Pune.

DIN 103-9Trapezoidal 30° · DIN 103-9

A trapezoidal thread gauge checks metric trapezoidal (Tr) threads, which have a 30° thread angle, to DIN 103-9. Accusize manufactures trapezoidal thread gauges in Pune in medium and coarse tolerance.

Trapezoidal thread gauges manufactured to DIN 103-9. Tolerance 7H/7e is recommended for medium quality and 8H/8c for coarse quality.

Medium tolerance
7H / 7e
Coarse tolerance
8H / 8c
Representative sizes & classes
QualityNutBolt
Medium7H7e
Coarse8H8c

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.

About this gauge

Trapezoidal gauges: what they are and how to choose

Trapezoidal threads are used for lead screws and similar parts that carry motion. DIN 103-9 recommends 7H for the nut and 7e for the bolt for medium quality, and 8H and 8c for coarse quality.

Share the diameter, pitch and tolerance on the quote page and we will confirm the gauge.

Common questions

Questions about Trapezoidal gauges

What are trapezoidal gauges?

A trapezoidal thread gauge checks metric trapezoidal (Tr) threads, which have a 30° thread angle, to DIN 103-9.

Which standard does it follow?

Manufactured to DIN 103-9.

What range is available?

Available ranges: Medium tolerance 7H / 7e; Coarse tolerance 8H / 8c.

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.

Which tolerance should I choose?

7H / 7e is recommended for medium quality and 8H / 8c for coarse quality. Follow the class on your drawing.

Is a trapezoidal gauge the same as an ACME gauge?

No. Trapezoidal has a 30° angle to DIN 103-9 and ACME has a 29° angle to ASME B1.5.

Do you supply outside Pune?

Yes. We supply across India and take enquiries from outside India too. See the where we supply page for details.

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

ACME & Stub ACMEValve thread gaugesMetric thread gauges
Gauge manufacturer in IndiaACME vs Trapezoidal Threads: The DifferenceGeneral engineering

Need trapezoidal gauges?

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.