Interconnect Solutions Group

About Interconnect Solutions Group

Nine specialist companies.
One unified group.

1987 Year Founded

35+ Years Experience

9 Group Companies

40+ Countries Served

FTSE 100 Backed

Part of Diploma PLC — FTSE 100

The Interconnect Solutions Group brings together nine specialist interconnect businesses across the UK, USA, Germany and Czech Republic. Each has its own identity, its own customers and its own market — they share the same standards and the same expectation of getting it right.

We are not a generalist distributor. Every company in the ISG group has been built around deep expertise in specific interconnect product areas and the industries that depend on them. Our people understand the difference between a specification-compliant component and one that will simply fit — and that knowledge protects our customers' projects.

From aerospace harnesses built under full traceability control, to rapid connector supply for Formula 1 race weekends, to low-outgassing cable for LEO satellites — ISG businesses work where precision and reliability are non-negotiable. We've been doing this since 1987 and the knowledge built over that time shows in how we work, not just what we stock.

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9 Companies. Global Reach.

Our group spans the UK, USA, Germany and Czech Republic, with distribution networks extending across France, India, China, Turkey and Poland — giving customers global sourcing, local expertise and rapid supply across multiple time zones.

35+ Years of Interconnect Expertise

The businesses that form ISG have collectively built up over three decades of interconnect knowledge — supplying the world's most demanding industries through successive waves of technical change. The people and relationships built over that time aren't something you put together quickly.

Part of Diploma PLC

ISG is a division of Diploma PLC, a FTSE 100 company specialising in the distribution of specialised technical products and services. Diploma's model is built around high-quality, value-added businesses serving markets where technical knowledge is critical — providing ISG with the stability and scale to support long-term projects.

Technical DNA

Our specialists don't just supply components — they understand the systems they go into. From MIL-SPEC wire selection to space-grade outgassing compliance, that knowledge matters in a market where most distributors are working from a catalogue.

Our Group Companies

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Rayfast UK United Kingdom Rayfast USA United States Rayfast s.r.o. Czech Republic Sommer GmbH Germany LJR Electronics United States Cabletec United Kingdom Astro Industries United States Filcon Electronic Europe Selwyn Electronics United Kingdom

Our Journey

From a single specialist distributor in Swindon in 1987 to nine businesses spanning the UK, Europe and North America — ISG's story is one of sustained, deliberate growth built on technical expertise and the right partnerships.

See our full history →

Approvals & Accreditations

Airbus Approved Boeing Approved ESA Registered NASA Registered DEF STAN MIL-SPEC IEC 60601 ECSS Qualified AS9100D ISO 9001

Technical Integrity

We don't compromise on specification. Every product we recommend is selected because it's the right solution — not the easiest one. Our customers run programmes where getting it wrong has real consequences.

Responsive Supply

Same-day despatch is not a headline — it is our baseline expectation. We hold significant stock and move fast, because project delays cost our customers money and reputation.

People First

ISG is built on relationships. Our specialists know their customers, their applications and their projects. When you call us, you speak to someone who understands the problem and has the knowledge to solve it.

More Than a Distributor

Precision Stocking.
Expert Support. Real Value-Add.

We hold over 60,000 product lines in stock across the group — backed by sector-specialist technical teams, flexible value-add manufacturing and bespoke stocking programmes tailored to your exact requirements.

Distribution Excellence

World-Class Stock & Distribution

Over 60,000 product lines across wire & cable, heat shrink tubing, connectors, sleeving and terminals — held in stock across our group companies. We know the product range inside out and carry the depth to back it up.

60,000+ SKUs in Stock
Rapid Dispatch
24-Hour Turnaround

60,000+ product lines in stock

Technical Expertise

Expert Technical Support by Sector

Our technical specialists are trained through the ISG Technical Academy and focused on specific industry sectors — not generalist sales staff. From aerospace wire harness to Formula 1 loom specification, our team gives practical application-level guidance across 10 market sectors.

Sector Specialists
ISG Academy Trained
Application Guidance
10 Industry Sectors

10 specialist industry sectors served

Value-Add Manufacturing

Custom Value-Add Services

We can process materials to your exact production requirements before they leave us. Cut-to-length, custom-printed, kitted and spooled to your spec — fewer steps at your end, less room for error on the line.

Cable Cutting & Processing
Custom Marker Printing
Product Kitting
Custom Spooling

5 core value-add capabilities

Bespoke Stocking

Bespoke Stocking Programmes

We build stocking profiles around your project, not the other way round. Tell us your schedule, your volumes and your packaging preferences — we'll hold what you need, in the quantities that work for you, ready when the line needs it.

Custom Stocking Profiles
JIT Inventory Management
Flexible Order Quantities
Priority Dispatch

1,000+ global clients served

Why Choose ISG

The Technical Supplier of Choice — Where Performance Cannot Be Compromised

Same-Day Dispatch Available

Standard stocking profile available for same-day shipment across the full product range

ISO 9001 & AS9120 Certified

Quality-assured to international aerospace standards — rigorous quality management at every step

50+ Years of Specialist Expertise

Founded 1975 — trusted by aerospace OEMs, defence primes and Formula 1 teams for over five decades

Personal, Knowledgeable Service

The global supplier of niche electrical-mechanical solutions with the personal touch — always accessible

Part of Diploma PLC (FTSE 100)

Financial strength and global backing as part of an international group delivering practical value-add solutions

ISO 9001 Certified AS9120 Aerospace Approved Diploma PLC Group 50+ Years Experience 60,000+ SKUs in Stock

Explore Our Services

Call us: +44 (0) 1793 616700 · sales@rayfast.com

Industries We Serve

Precision solutions engineered for
the most demanding environments

Aerospace Division

Wire & Cable for
Commercial & Military Aviation

We offer a wide choice of wire and cable to meet the demands of the aerospace industry, along with associated routing and management products. Approved for the majority of today's commercial and military aircraft fleets.

Airbus Group and Boeing approved cable constructions
XLETFE, XLPE/XLPVDF and hybrid constructions available
Thin-wall technology — up to 50% weight reduction achievable
Temperature range: −65°C to +260°C
Full backshell, connector and harness component supply

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Flight Deck

Lightweight XLETFE and XLPE/XLPVDF cables for avionics. Airbus & Boeing approved.

Fuselage Harness

Multi-core harness for IFE, cabin lighting and passenger systems throughout the fuselage.

Engine Pylon Wiring

Fluid-resistant power cables rated to +260°C for engine control and fuel management.

Wing Structure

Thin-wall wire bundles — up to 50% weight reduction vs conventional cable.

Landing Gear Bay

Ruggedised harness assemblies rated for hydraulic fluid exposure and wide temperature swings.

Defence Division

Military-Grade Cables for
Air, Ground & Naval Platforms

We work with our suppliers' innovative R&D programs to offer a range of military-approved wire, cable and harness components for demanding air, ground and marine defence applications. Built to perform where failure is not an option.

Military specification (Mil-Spec) wire and cable
Ruggedised connectors and backshell systems
EMI/RFI shielding and protection solutions
Air, ground vehicle and naval platform supply
Full harness component supply for MoD projects

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Engine Bay

High-temperature cables and connectors for power distribution in extreme conditions.

Cab & Command Systems

MIL-SPEC screened cables for comms, navigation and command with EMI-protected harness assemblies.

Command Body

Ruggedised multi-core harnesses for power and data throughout the rear command compartment.

Chassis & Drivetrain

Abrasion and fluid resistant cables for driveline control — designed for battlefield environments.

Motorsport Division

Race-Proven Components for
F1, WRC & Global Motorsport

Established experience supplying the pinnacle of motorsport — Formula 1, WRC, Formula E, Sports and Touring Cars, Moto-GP, Superbikes, NASCAR and Indy. Lightweight, high-performance and engineered to win.

Formula 1 and WRC approved component supply
Deutsch Autosport connector franchise partner (TE Connectivity)
Lightweight wire and cable for marginal gains
Cable and hose protection sleeving solutions
Rapid prototyping and same-season turnaround

Explore Motorsport →

Front Wing & Aero

Ultra-lightweight wiring looms for front wing sensors, DRS actuation and aero load monitoring.

Suspension & Wheel

Flexible harness for wheel speed sensors, brake temp and suspension position monitoring.

Cockpit & Driver Systems

Screened, lightweight cables for steering wheel data, driver controls and safety systems.

Power Unit & ERS

High-temperature, low-weight cables for hybrid power management and ERS systems.

Marine Division

Electrical Solutions
Stem to Stern

We supply everything from stem to stern — wire and cable, interconnect components and cable management. Our smarter system-level solutions save space, provide low fire hazard and boost performance in the harshest marine environments.

International naval and commercial marine approvals
Waterproof and corrosion-resistant cable assemblies
Low fire hazard, low smoke zero halogen (LSOH) options
Weight-saving, ruggedised materials throughout
Complete cable management solutions onboard

Explore Marine →

Bridge & Superstructure

Screened data cable for navigation, radar and communications systems.

Bow Section

Sealed connectors and corrosion-resistant cable for bow thrusters and anchor systems.

Engine Room

High-current LSOH cable and power terminals for main propulsion and auxiliary generators.

Stern Systems

Sealed terminals and marine cable for steering gear, rudders and aft equipment.

Space Division

ESA & NASA Registered Products
for Space Applications

We supply a wide range of products for the space industry. Many carry ESA approval or NASA registration, with select products featuring low-outgassing properties — essential for vacuum environments where conventional materials would fail.

ESA-approved and NASA-registered products available
Low-outgassing cable and connector solutions
Extreme temperature performance across full range
Radiation-tolerant materials for orbital environments
Suitable for launch vehicles, satellites and ground systems

Explore Space →

ESA

& NASA Registered

Certified for the rigours of
launch, orbit and beyond

Medical Division

High-Reliability Solutions
for Medical Devices

From imaging and diagnostics to surgical robotics and patient monitoring — we supply precision interconnect components that meet the demanding regulatory requirements of the global medical device sector.

IEC 60601 compliant cable assemblies
Ultra-flexible, kink-resistant solutions for robotic surgery
Sterilisation-resistant materials and coatings
Full component traceability and quality dossiers
Biocompatible materials available on selected products

Explore Medical →

IEC

60601 Compliant

Precision components for
critical medical applications

Industrial Division

High-Performance Cable for
Heavy Industry & Automation

We supply high-performance wire, cable, control system components and cable management accessories for the industrial sectors — including heavy equipment, lighting and underground applications. Built tough, built to last.

High-performance wire and cable for industrial control
Advanced cable management systems and accessories
Industry-approved materials meeting key standards
Suitable for heavy equipment, automation and lighting
Weight-saving and ruggedised options available

Explore Industrial →

24/7

Industrial Reliability

Engineered for continuous
operation in demanding environments

UAV Division

Interconnect Solutions for
Unmanned Aerial Vehicles

We supply lightweight, high-reliability interconnect for UAV and drone platforms — from small tactical systems to large MALE/HALE aircraft. Purpose-selected wire, connectors and harness protection engineered for the unique demands of unmanned flight.

Ultra-lightweight wire and cable for maximum endurance
Miniature connectors and micro-D solutions for compact avionics
EMI shielding for sensor and data link integrity
Vibration-resistant terminations for high-G environments
Temperature-rated materials from −55°C to +200°C

Explore UAV →

UAV

Unmanned Systems

Lightweight, reliable interconnect
for unmanned aerial platforms

Global Presence

Where We Operate

From our UK headquarters in Swindon to group companies across England, the USA, Germany and Czech Republic — the ISG network spans the globe.

9Group Companies

4Countries

10+Industry Sectors

50+Years Experience

1,000+Global Clients

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Rayfast · Krempfast

Swindon, England

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Cabletec

Weston-super-Mare, England

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Selwyn Electronics

Swindon, England

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Rayfast USA

Indianapolis, Indiana

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LJR Electronics

Miamisburg, Ohio

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Astro

Dayton, Ohio

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Rayfast s.r.o.

Prague, Czech Republic

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Sommer GmbH

Stuttgart, Germany

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Filcon

Taufkirchen, Germany

Connecting the
world's most
critical industries

Nine specialist companies.
One unified group.