Pennoyer-Dodge Co.
Manufacture, recondition, and calibration of thread rings, thread plugs, and cylindrical gages. Custom Go and Not Go thread gauges and functional gaging.
http://www.pdgage.com

Unik Gauges & Tools
manufacturer of thread plug gauges, thread ring gauges, plain plug gauges, plain ring gauges, snap gauges, special gauges, thread and plain ring gauges, msr and plain ring gauges, taper ring gauges, measuring pins, single ended plate snap gauges, gauges and accessories, thread gauges, plain gauges, ring gauges, non standard gauges, measuring instruments, india
http://www.unikgaugesindia.com/

Allen Gauges
Gages and Tool Company. Gauges for threaded tubular products like lead, thread height, buttress and profile gages.
http://www.allengauges.com

Waare Instruments Limited
Manufactures pressure gauges, temperature gauges, needle valves, glass thermometers, capsule gauges, and diaphragm gauges.
http://www.waaree.com

Ideal Thread Gage Manufacturing Co, Inc.
Ideal Gage has been serving the Aerospace Industry for over fifty years with Competitive Pricing on all gages,Free 8 8 9 Thread Engineering Standard Plugs and Many Specials in Stock. High quality gage,aerospace gages,threaded plug gage,ring gage,taperlock thread plug gages,pin gage,plug gage,metric gage,agd style thread ring gages,
http://www.idealgage.com/

Thread Check Inc
We offer a complete line of precision thread gauges, plain cylindrical gages, patented 3 wire measuring systems, powerful thread engineering software, master discs, gear measuring wires plus more with free technical support.
http://www.threadcheck.com/

Kordt GmbH and Co.
Kordt Fabrik für Lehren und Messzeuge - hohe Qualität - bequeme Handhabung - große Messsicherheit - robuste, werksattgerechte Ausführung
http://www.kordt.de/

Sanbang Thread Industry Co., Ltd
Polyester sewing thread and rayon embroidery thread. Also, suppliers of zippers, buttons and sewing kits.
http://www.sewing-thread.com/

Thread Check, Inc.,
We offer a complete line of precision thread gauges, plain cylindrical gages, patented 3 wire measuring systems, powerful thread engineering software, master discs, gear measuring wires plus more with free technical support.
http://www.threadcheck.com/

Thread & Gage Co., Inc.
Precision thread grinding services
http://www.threadgageco.com