KTH Holts Ltd

KTH Holts Ltd is an accredited heat treatment provider based in West Yorkshire, United Kingdom, established in 1860. Starting out as engineers and blacksmiths, the company evolved into heat treatment under Herbert Buckley as science and technology developed in the early twentieth century, and today brings over 150 years of experience to the precision engineering industry.

As part of the KTH Engineering Group, the company operates some of the biggest heat treatment and gas carbonising furnaces, alongside vacuum heat treatment, PMI and ferrite testing, metal straightening services, stainless steel hardening and annealing. KTH Holts is NADCAP approved and certified and works to BSI ISO 9001 as a heat treatment provider. Its processes are certified for critical components in the aerospace and precision engineering industries, helping customers enhance toughness, improve surface hardness, prevent oxidation and minimise distortion.