The ISG Group
The Interconnect Solutions Group brings together twelve specialist businesses across the UK, USA and Europe. Each operates independently in its own market, with its own customers and identity — united by shared technical standards and a consistent commitment to supplying high-quality, high-performance product.
01
Rayfast UK
🇬🇧 Swindon, United Kingdom
Rayfast traces its roots to the mid-1970s as a Raychem subsidiary, becoming an independent distributor in 1987. From its headquarters in Swindon, Rayfast has supplied specialist heat shrink tubing, wire, cable and harness accessories to the world's most demanding industries for nearly four decades.
Operating from a purpose-built UK distribution facility, Rayfast holds millions of pounds of stock across its product range with same-day despatch capability. Its deep supplier relationships — particularly with the world's leading heat shrink manufacturers — give customers access to technical support and genuine, specification-compliant product.
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Rayfast USA
🇺🇸 United States
Rayfast USA extends the Rayfast product range and technical expertise into North American markets, providing US-held stock and local technical support for aerospace, defence, motorsport and industrial customers across the United States.
The US operation enables dual-source supply capability for transatlantic projects, ensuring continuity of supply for customers operating across both UK and US markets — particularly important for defence projects with domestic supply requirements. Rayfast USA also supports the North American motorsport industry, supplying the specialist wiring and interconnect products demanded by high-performance racing applications.
View full profile →03
Rayfast s.r.o.
🇨🇿 Czech Republic
Rayfast s.r.o. serves the Central and Eastern European market from the Czech Republic, providing local-language technical support and EU-held stock across the full Rayfast product range.
Positioned to serve German, Czech, Slovak and broader European customers, Rayfast s.r.o. provides the rapid, responsive service that the Rayfast group is known for — with the added benefit of local market knowledge and EU customs simplicity.
View full profile →04
Sommer GmbH
🇩🇪 Neuhausen, Germany
Founded in 1978 as a pure shrink tube dealer, Sommer GmbH has grown into a leading German distributor of shrink, cabling and connection technology. Based in Neuhausen near Stuttgart, Sommer became part of Diploma PLC in 1998 and is ISG's European distribution hub.
Sommer provides German-language technical support and locally held stock across heat shrink tubing, wire and cable, connector accessories and moulded parts — serving industrial, aerospace and automotive customers across Germany and continental Europe.
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LJR Electronics
🇺🇸 Miamisburg, Ohio, United States
Founded in 2013 and headquartered in Miamisburg, Ohio, LJR Electronics is a stocking distributor of industrial electrical connectors, connector accessories and braided sleeving — acquired by ISG in January 2022. The team brings over 50 years of combined experience in the Deutsch connector market.
LJR stocks Deutsch, Amphenol, Carlisle and Techflex product lines, with same-day US shipping and a focus on rapid, knowledgeable supply for truck & bus, marine, agriculture, emergency services and industrial customers across North America.
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Cabletec
🇬🇧 Weston-super-Mare, United Kingdom
Cabletec is the UK's leading manufacturer of EMI screening braids, earth bonding leads, copper braids, flexible busbars and power shunts — with over 30 years of expertise in metal braid manufacture. Based in Weston-super-Mare, the business serves defence, aerospace, motorsport and industrial customers worldwide.
In addition to its specialist braiding facility, Cabletec manufactures bespoke multicore cables and assemblies and stocks a broad range of high-performance wire and harness components — from rapid-response prototyping through to long-run programme supply.
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Astro Industries
🇺🇸 Dayton, Ohio, United States
Established in 1967, Astro Industries is a US specialist in military and commercial wire, cable, cable assemblies and accessories. Operating from a fully equipped plant in Dayton, Ohio, the company serves the military, aerospace, commercial and industrial sectors with an extensive product range and a reputation for fast, technically sound supply.
Astro holds significant stock of MIL-SPEC and commercial wire and cable products, with a sub-48-hour turnaround commitment and just-in-time inventory programmes. Value-added services include cut & strip, tinning, marking, kitting and twisted cabling.
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Filcon Electronic
🇩🇪 Taufkirchen, Germany
Founded in 1985 in Taufkirchen near Munich, Filcon Electronic GmbH has spent four decades building a reputation as one of Europe's foremost specialists in high-tech connector systems for safety-critical applications. Aerospace, defence and medical customers turn to Filcon when connector selection cannot be left to chance.
Filcon holds EN 9120 aerospace certification and ISO 9001 quality accreditation, supplying both standard and individually custom-engineered connector solutions to major aerospace, defence and industrial projects across Europe and beyond.
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Selwyn Electronics
🇬🇧 United Kingdom
Selwyn Electronics is a UK-based specialist in connectors, assemblies and interconnect solutions. The team brings deep experience in connector and assembly supply, an established customer base and a focused, technically grounded approach aligned with ISG's standards.
As part of ISG, Selwyn Electronics benefits from the group's scale, supplier network and shared technical resource — while retaining the specialist identity and direct customer relationships that define its offering. Full details are available at selwyn.co.uk.
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CDM Inc.
🇺🇸 Turnersville, New Jersey, United States
Founded in 1993 and headquartered in Southern New Jersey, CDM Inc. is a US-based authorised distributor of interconnect products and manufacturer of engineered cable assemblies. The business operates from an ISO 9001:2015 and AS9100D certified 43,000 square foot distribution and manufacturing facility, supported by a 51,000 square foot manufacturing facility in Salisbury, Maryland.
CDM serves the world's leading military contractors, aircraft manufacturers, communications providers and medical diagnostic equipment leaders — combining deep franchised inventory with in-house engineering, assembly and AS9100D-certified quality systems.
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FC Lane Electronics
🇬🇧 Horsham, West Sussex, United Kingdom
Founded in 1966 by Fred Lane and headquartered at Slinfold Lodge near Horsham, FC Lane Electronics has built six decades of expertise serving Mil/Aero, motorsport, offshore, geophysical and test and measurement customers across the UK and internationally.
FC Lane supplies practically every connector type required by demanding interconnect applications — multi-pin circular, high power circular, data circular, filtered, RF/coaxial, D-sub miniature, multi-pin rectangular, IDC/DIN, PCB connectors, edge connectors, backshells and adaptors — supported by deep franchised inventory and technical sales expertise.
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Weald Electronics
🇬🇧 West Sussex, United Kingdom
Weald Electronics manufactures high-performance circular connector systems and accessories engineered for defence, aerospace and demanding industrial applications. Operating from a UK facility in West Sussex with over 40 years of design, manufacturing and qualification experience, Weald builds interconnection solutions to stringent military specifications including MIL-DTL-38999, MIL-DTL-5015 and MIL-DTL-26482 series.
Weald's in-house capability spans design, development, manufacture, testing and qualification — supplying leading equipment manufacturers with circular connectors, EMC/RFI shielding backshells, cable clamps and a full range of supporting accessories, all built to BS EN ISO 9001:2015.
View full profile →The Interconnect Solutions Group is a division of Diploma PLC, a FTSE 100 company supplying specialist technical products and services across the life sciences, seals and controls sectors.
Diploma invests in specialist distribution businesses where deep technical knowledge and reliable supply create lasting differentiation. ISG businesses gain the backing and resources of a major group while retaining the specialist focus and direct customer relationships that define their value.
FTSE 100
London Stock Exchange
£1.7bn+
Annual Revenue
20+
Group Businesses
3
Core Sectors