https://www.micronix.cz/znacka/diametral/
Diametral - MICRONIX,spol. s r.o.
s rdiametralspol
https://utpvision.com/en/certificates/
Accredited Laboratory: optical system for diametral measurement - UTPVision
Apr 28, 2026 - UTPVision's LAT 313 Center is an ACCREDIA accredited laboratory authorized to issue calibration certificates with guaranteed metrological traceability.
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https://www.roton.com/products/worms/diametral-pitch-worm-thread-dimensions/
Diametral Pitch Worm Thread Dimensions - Roton Products, Inc.
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