Our Accreditations

The standard of quality we adhere to in every job we complete is the most imperative part of the business, quality being at our core. Operating our business this way is why we continue to be at the forefront of our industry as well as the contributing reason to the longevity of KTH Holts.

Quality Standard

All of the work we complete is controlled through ISO 9001:2015 or NADCAP AC7004 quality management systems. Our core principles include a strong customer focus, top management commitment and continual improvement. Working to ISO 9001:2015 results in our customers getting consistent good quality services.  

As a continuation of our quality we are actively working towards ISO 14001:2015 to actively reduce the impact we have on the environment as well as OHSAS18001:2007 for our health and safety purposes. Achieving these will ensure our Quality standards are a significantly greater part of the business. Once we have attained these additional standards KTH Holts along with our other counterparts in the KTH Engineering group will all be offering the same standards of quality, environmental and safety compliance.

BSI Certificate


Aerospace Quality System:

NADCAP is the international aerospace and defence contractors accreditation system. It is independently accredited and is the basis for all civil & defence aerospace quality assurance. NADCAP Accreditation assures the quality and traceability of every component in every western aeroplane.

KTH Holts has continuously achieved the highest level of audit compliance in every inspection since 2013.

Gaining this certification demonstrated conformance and recognition of accreditation for Aerospace Quality System (AC7004) until 2021.

Cert AC7004 2017-2021

Heat Treating

KTH Holts also has the same accreditation from the NADCAP program for Heat Treating.

NADCAP 188339 Certificate