Metric thread forms are common across a significant range of fastener products, so that for example, an M5 thread is the same irrespective of the head type or screw style.
There are fine thread, extra fine thread and constant pitch series, but if possible these are to be avoided as their stocked range is not as comprehensive as it is for your more general coarse pitch threads.
Challenge (Europe) Ltd M.D. Kevin Moorcroft, explained: "The coarse pitch series of threads will meet most general engineering requirements so these are the standard production and ex-stock items. The more specialist threads such as an M10 fine pitch socket head cap screw, may be stocked by specialists such as ourselves here at Challenge Europe but of course the finer pitch thread forms can come at a premium price simply by reason of economies of supply.
"Similarly for 'old' imperial threads such as the B.A. range, once commonly used within electrical equipment, which has seen its availability diminish during the last recession leading to enforced redundancy in many applications. Although demand still exists for the range, only those sizes/types with viable volumes tend to be stocked and available at reasonable pricing. Sizes not commonly stocked can be small batch produced but again at the risk of premium pricing."
Other thread forms are slightly different – for example self-tapping screws which have a coarser pitch – and were conventionally used in sheet metal work with variants later developed specifically for use in plastics, the latter becoming more commonly known as thread forming screws.
Thread forming screws also exist for use in metals and create a finer machine screw type thread by material deformation during insertion, the theory being that a thread forming screw could be removed if required and replaced with a machine screw. Thread cutting screws also exist having a lead in design feature that specifically aids the cutting/removal of material in a similar way to a thread tap.
Thread forming and cutting screws tend to be smaller sizes typically M2 up to M8 – possibly M10 depending on the drive – since security of the drive determines the amount of torque that can be transferred to the screw.
Specials, e.g. self-drilling screws, are another variant available in a several drill point and thread configurations suitable for use in a diverse range of applications and industries.
www.challenge-europe.co.uk
Construction News
10/03/2017
Challenge (Europe) Showcases Screws And Fasteners Stock


25/04/2025
Aston Villa Football Club has unveiled plans to refurbish and expand the iconic North Stand at Villa Park, a major step in the wider regeneration of the North Grounds.
The redevelopment will raise the stadium's total capacity to over 50,000, with the North Stand alone increasing to more than 12,00

25/04/2025
Morgan Sindall Construction's Southern Home Counties team has officially handed over the newly completed Crawley Innovation Centre to Crawley Borough Council (CBC).
The transformation of the former TUI travel house into a cutting-edge innovation, economic and technology hub drew local leaders, busi

25/04/2025
Clowes Developments has confirmed that construction will soon commence on five new trade counter, warehouse and industrial units at Stud Brook Business Park in Castle Donington, following planning approval from North West Leicestershire District Council.
The new development, Plot 1, will feature fi

25/04/2025
A historic 18th-century landmark has been carefully restored as part of the major Garendon Park housing development in Loughborough.
The Grade II* listed Obelisk, located within the grounds of the former Garendon Hall estate, had endured years of weathering before undergoing a sensitive restoration

25/04/2025
Mace has appointed industry heavyweight, Gary Sweeney, to head up its European team working across the Healthcare, Life Sciences and Technology sectors.
Gary joins Mace following a spell as Interim Director in Turner & Townsend’s Advanced Manufacturing, Industrial and Logistics division in the UK

25/04/2025
A groundbreaking ceremony has recently marked the start of a £5.5 million extension project at Thorp Academy in Ryton, Gateshead.
The development, aimed at accommodating the growing student population, is being delivered by Morgan Sindall Construction on behalf of the Northern Education Trust (NET

25/04/2025
Wakefield-based Henley Stone Specialists has been appointed to deliver Glass Reinforced Concrete (GRC) elements for the first phase of 'Our Cultural Heart', Kirklees Council’s flagship project aimed at revitalising Huddersfield town centre.
Part of the Henley Construction Management Group, Henley S

25/04/2025
More than 2,500 Nottingham homes are set to benefit from energy efficiency improvements as part of a major £153 million regional initiative to cut household bills and carbon emissions.
Nottingham City Council's Executive Board has approved the acceptance of nearly £76 million in Government funding

25/04/2025
Introduction: What Is a Fitted Hoist?
A fitted hoist is a mechanical lifting device installed in the home to help safely move individuals with limited mobility. Commonly found in bedrooms, bathrooms and living spaces, these systems make it easier and safer to transfer someone between a bed, chair,

25/04/2025
Rail services between Hereford and Shrewsbury are facing significant disruption following the collapse of an underground culvert, forcing the closure of the line in both directions.
Emergency engineering works are underway to ensure the safety of the railway.
Network Rail's engineering teams are