Fastener Testing

Despite the ever improving and advancing technologies in fastener manufacturing, the risk of poor manufacturing still cannot, and probably never can, be completely removed. Owlett-Jaton has therefore adopted a long-standing procedure of rigorous product testing, carried out specifically at the point of arrival. 

A long-standing procedure of product testing ensures that any poorly manufactured fasteners are contained before they are processed by the Goods In department. In turn, this practice prevents contamination from filtering throughthe supply chain – right down to the person or machine applying the fasteners. 

Part of the overall process is the dedicated Quality Assurance department carrying out routine dimensional testing. Approximately 60% of inbound fasteners are checked – a large job when it’s considered that Owlett-Jaton receives approximately 80,000kg of stock every day. It is worth noting that this approach is not a legal requirement, has no accreditation dependency, is not a box ticking exercise, but rather a mindset for Owlett-Jaton to want to do the right thing by customers and beyond.

Standard dimensional testing includes using calliper gauges, ring and plug gauges – both with ‘go’ and ‘no-go’ functions, and if required, the Keyence IM-7000 series image dimension measurement systems. A rolling, random programme is generated for the QA inspection team to carry out routine and regular testing, with all captured data recorded for future reference.

National and international standards to drawings are used for verifying including DIN, ISO, BS and SAE. Dimensions such as Across Flats (AFs), depth of head/nut, thread integrity, length of thread and product, are just some of the dimensions that are scrutinised.

All equipment is routinely sent off-site and independently tested, calibrated, and certified by a dedicated accredited calibration company, to ensure it remains accurate at all times.

In the rare instances where a fastener failure is identified, the entire consignment is immediately quarantined and stored safely, avoiding any contamination. A PCR (Purchasing Concern Report) is raised, clearly identifying product information, batch and lot numbers, quantities, as well as the failure in question. The supplier is notified, enabling them to address the issue appropriately. The stock is either disposed of locally or returned to the manufacturer; and replacement stock is issued.