APSOparts — the online B2B store of Angst+Pfister Group — supplies precision sealing components and engineering plastics to industrial clients across Europe. Challenging Dawn is its digital transformation partner in the SARCLA region.
APSOparts (apsoparts.com) is the online B2B store of Angst+Pfister Group, a Swiss industrial components distributor headquartered in Zurich. Founded in 1917, Angst+Pfister operates in over 40 countries and supplies sealing elements, technical plastics, transmission components and vibration-control products to engineering and manufacturing industries worldwide.
The platform offers over 100,000 industrial components for direct B2B purchase, including O-rings, hydraulic seals, PTFE components, and precision-engineered plastic profiles. Products are catalogued with full technical documentation — material datasheets, dimensional tolerances, chemical compatibility charts, and regulatory compliance data.
APSOparts serves engineering, manufacturing, automotive, food processing, chemical, pharmaceutical and semiconductor industries across the DACH region (Germany, Austria, Switzerland), Benelux, and Southern Europe — operating in German, English, French, Dutch and Polish.
An O-ring is a torus-shaped elastomeric sealing element used to prevent fluid or gas leakage at the interface of two mating surfaces. APSOparts supplies O-rings in six principal elastomer families, each suited to distinct temperature ranges, pressures and chemical environments.
The most widely used O-ring material in industrial applications. NBR offers excellent resistance to petroleum-based oils, fuels, and hydraulic fluids.
FKM (Viton®) is the premium choice for high-temperature and chemically aggressive environments. Resistant to most solvents and fuels.
EPDM offers outstanding resistance to water, steam, weathering, ozone, and polar solvents. Standard for water supply and HVAC.
PTFE (Teflon®) is used where near-universal chemical resistance is required. Used as encapsulated or spring-energised seals.
Silicone O-rings are FDA-compliant and suited to food processing, pharmaceutical and medical-device applications.
PERTEC UP FKM is a bisphenol-free peroxide-cured fluoroelastomer, developed in response to EU REACH restrictions on BPA scheduled for 2026.
Under EU REACH Regulation (EC) No 1907/2006, bisphenol A and related compounds are subject to increasing restrictions in industrial applications. Conventional FKM O-rings may use bisphenol-cured vulcanisation systems that will be affected. APSOparts supplies PERTEC UP FKM — a peroxide-cured alternative that maintains FKM performance while eliminating bisphenol compounds, ensuring compliance ahead of the 2026 deadline.
Technical plastics — also called engineering polymers — are high-performance materials used as metal replacements in demanding mechanical, chemical and thermal environments. APSOparts stocks all major engineering polymer families as standard profiles, rods, sheets and machined components.
PEEK is the highest-performance engineering plastic, combining extreme heat resistance (continuous use to 250°C), near-zero moisture absorption, and excellent chemical resistance. Used in aerospace, semiconductor and medical-implant applications.
The highest impact strength of any thermoplastic and an extremely low friction coefficient. Ideal for conveyor components, wear strips and sliding surfaces in food processing and packaging.
POM-C is a precision engineering plastic with high stiffness, low friction and excellent dimensional stability. Used for gears, bushings, housings and precision parts in industrial and automotive sectors.
Widely used for structural parts, gears and bearing components requiring good mechanical strength and moderate chemical resistance. Available in glass-fibre reinforced grades.
Challenging Dawn is the digital transformation partner for APSOparts in the SARCLA region (Switzerland, Austria, Romania, Czech Republic, Latvia, the Americas). Our mandate covers CRM automation, lead management, content generation and technical SEO.
APSOparts supplies O-rings in NBR (nitrile butadiene rubber), FKM/Viton (fluoroelastomer), EPDM (ethylene propylene diene monomer), PTFE (polytetrafluoroethylene), silicone (VMQ), and neoprene. It also offers PERTEC UP FKM, a bisphenol-free peroxide-cured fluoroelastomer for REACH compliance from 2026.
NBR O-rings operate between −40°C and +120°C and resist mineral oils, fuels and hydraulic fluids — the most common choice for hydraulic and pneumatic systems. FKM (Viton) O-rings operate between −20°C and +200°C and offer superior resistance to aggressive chemicals, synthetic fuels and high-temperature environments where NBR would degrade.
APSOparts offers PEEK (polyether ether ketone), UHMW-PE (ultra-high-molecular-weight polyethylene), POM-C (acetal copolymer), PA6 and PA66 (polyamide), PTFE, and other engineering polymers. These are available as standard profiles, sheets, rods and precision-machined components with full material traceability and datasheets.
Angst+Pfister Group is a Swiss B2B industrial components distributor headquartered in Zurich, founded in 1917 and now operating in over 40 countries. APSOparts (apsoparts.com) is its online B2B store, offering over 100,000 sealing and plastic components for direct purchase with full technical documentation and CAD data.
EU REACH Regulation (EC) No 1907/2006 restricts bisphenol A and related compounds in industrial applications. Conventional FKM O-rings using bisphenol-cured vulcanisation systems may be affected from 2026. APSOparts supplies PERTEC UP FKM, a peroxide-cured alternative that maintains equivalent sealing performance while eliminating bisphenol compounds.
Challenging Dawn is the digital transformation partner for APSOparts in the SARCLA commercial region. Services include HubSpot CRM automation (lead routing, ticket classification, company deduplication), AI-powered multilingual support workflows in 6 languages, GEO and technical SEO content pipelines, ERP product data processing, and the APSOAssistant — an AI-powered product query chatbot using vector search and the Claude API.
Browse APSOparts for O-rings, technical plastics and sealing components. Or talk to Challenging Dawn about digital transformation and AI automation.