O-Ring Handbook — The O-Ring Store
  • Home
  • Compounds & Certs
    • Nitrile (NBR)
    • HNBR (HSN)
    • EPDM
    • Viton® (FKM)
    • Viton® Extreme ETP
    • Silicone (VMQ)
    • Fluorosilicone (FVMQ)
    • Neoprene (CR)
    • Aflas® (FEPM)
    • FFKM (Simriz®)
    • PTFE (Teflon®)
    • PTFE Encapsulated
    • Urethane Cast
    • Urethane EU
    • Butyl (IIR)
    • Standards & Certifications
  • Compatibility
    • Chemical Compatibility Chart
  • Sizing
    • Master O-Ring Size Chart
    • How to Measure
    • Groove Charts
    • Cord Tolerances
  • Design | Engineering
    • O-Ring Basics
    • Sealing Principles
    • Seal Types & Profiles
    • Groove Design
    • Shore A Hardness
    • Back-Up Rings
    • Applications
    • Failure Analysis
  • Applications
    • By Industry
    • Special Uses
    • Failure Modes
    • Troubleshooting
    • Installation
    • Rules of Thumb
    • Shelf Life
  • Calculators
    • Weight Calculator
    • Groove Calculator
    • Cord Cut Length
  • Articles
  • About
  • Contact

FDA

Black round-cord EPDM O-Ring on a wooden table with a stainless wall-mounted bottle filling station in the background

EPDM NSF-61 O-Rings: Peroxide-Cured, Chloramine-Resistant Potable Water Seals

Buy EPDM FDA/NSF-61 peroxide-cured O-Rings for chloraminated drinking water, hot water, and food contact. Specs, approvals, and where this 70 duro compound belongs.

FDA 21 CFR 177.2600 (Food-Contact O-Rings)

FDA-compliant O-Rings under 21 CFR 177.2600, the regulation for rubber articles intended for repeated food contact.

Handbook

  • Materials
  • Compatibility
  • Chemical Compatibility Chart
  • Sizing
  • Groove Charts
  • O-Ring Weight Calculator
  • O-Ring Groove Calculator
  • Cord Cut Length Calculator
  • Applications
  • Articles

The O-Ring Store

  • Shop O-Rings
  • O-Ring Kits (OSK)
  • Contact Us

Get In Touch

The O-Ring Store LLC
1847 Wilma Dr, Clarkston, WA 99403
(208) 413-6377
[email protected]
Mon to Fri, 8 to 5 PT

  • Send Us a Message
ISO 9001:2015 Certified, The O-Ring Store LLC, certified by LRQA
    • © 2026 The O-Ring Store LLC. All rights reserved.