FKM · Fluoroelastomer · NH O-RING
FKM O-rings
The proven standard material for O-rings: resistant to oils, fuels and many chemicals, also available as an FDA variant.
FKM (also called FPM or the Viton® type) is the industry's most widely used high-performance sealing material. Over 200,000 sizes available, much of it from stock.
Key properties at a glance
The most important technical data at a glance. Exact values per compound in the data sheet.
Temperature
−40/+225 °C
depending on compound
Hardness
70-75
Shore A
Density
1.84-1.85
g/cm³
Shelf life
10 years
per DIN 7716
Types and compounds
The available compounds of this material with their key data.
Product range flyer 2026
PDF download
The entire product range at a glance
FFKM, FKM, FEP and PTFE with temperature ranges, hardnesses and approvals, compact in one PDF. Over 200,000 sizes available, 30,000 of them from stock.
Strengths
Oil and fuel resistant
Resistant to mineral oils, fuels, many acids and chemicals.
Up to +225 °C
Continuously usable from −40 °C to +225 °C depending on compound.
FDA variant
FKM75SFD with FDA compliance for food contact.
Proven all-rounder
The industry's most widely used high-performance sealing material.
Standards and conformity
Toleranced to ISO 3601
Dimensions and dimensional tolerances per international standard.
REACH-compliant
Complies with the EU chemicals regulation REACH.
RoHS-compliant
Free from substances restricted under RoHS.
Data sheets and technical tools
All technical documents for design and reference, free and without registration.
O-ring data sheets
Temperature, hardness, density and approvals by material.
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O-ring size tables
Look up standard sizes and dimensions.
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O-ring resistance
Check media resistance by material.
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O-ring tolerances
Read off dimensional tolerances per ISO 3601-1.
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O-ring groove calculator
Design the housing and groove reliably.
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O-ring glossary
Terms and fundamentals explained clearly.
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Looking for FKM O-rings?
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Become a customer and get access to over 200,000 available O-ring sizes, 30,000 of them from stock: no minimum order quantities, no tooling costs, and with personal expert advice.
Over 200,000 O-ring sizes available
30,000 sizes from stock, 5,000 of them in FFKM
No minimum order quantities and no tooling costs
Expert advice and service within 30 minutes
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