P.O. Box 328
Hampton, NH 03842-0328
Phone:  603-929-4414
Fax:  603-929-4436
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Standard Charts
Measuring Scales
Thread Charts
Click Here to Download our Catalog.
Click Here to Download our Price List.

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Chart Style:
Chart Size:
Comparator Model:
Comparator Manufacturer:
Protractor Ring:

Availabile in Glass, Vinyl or Mylar.

7-80 Pitch
Style T-30 National Thread forms per FED-STD-H28
Style T-31 Unified Thread forms per FED-STD-H28
Style T-32 UNJ Thread forms per MIL-S-8879
Style T-33 UNK/UNR Thread forms per MIL-B-7838B
Style T-56 ISO Metric Thread forms (0.25-4.00) per FED-STD-H28
Style T-57 Internal Unified Thread forms per FED-STD-H28
Style T-58 Internal ISO Metric Thread forms (0.25 - 4.00) per FED-STD-H28
Style T-59 Acme Thread forms per FED-STD-H28
Style T-60 Trapezoidal Metric Thread forms

1. All thread charts ar viewed perpendicular to the axis of the thread.
2. The generally accepted magnification for inspection of threads is 31.25x or greater.
Please call for availability of lesser magnifications.

Due to the variety of comparator makes and models that we support, chart prices are not reflected in your shopping cart. Please click on the Price List link in the Downloads section of this page to determine pricing for your chart.
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