If your goal is to reduce downtime, eliminate guesswork, and stay compliant in potable water and food-contact applications, this OSK™ Industrial Standard O-Ring Kit delivers exactly that. The K436X36N70-FDA/NSF61 O-Ring Kit provides a carefully selected range of the most commonly used AS568 sizes so maintenance teams, OEMs, and service technicians always have the right O-Ring on hand when it matters most.
This kit is built with FDA and NSF/ANSI 61 compliant Buna-N (Nitrile) O-Rings, molded to 70 durometer, offering reliable sealing performance, excellent oil and water resistance, and long service life. The result for the customer is fewer leaks, faster repairs, and confidence that every seal meets regulatory requirements without chasing paperwork or suppliers.
Operating temperature
Operating temperature: -40° to +225°F (–40° to +107°C)
Material & Performance Details
These O-Rings are manufactured from FDA and NSF61 compliant Buna-N (Nitrile Rubber), black in color, with a 70 Shore A durometer. This compound is widely trusted for its balance of elasticity, abrasion resistance, and compression set performance, making it ideal for general industrial, water-handling, and sanitary systems.
Buna-N offers dependable sealing in static and dynamic applications where oils, water, and mild chemicals are present. Its resilience helps maintain a tight seal over repeated pressure and temperature cycles, reducing maintenance frequency and total cost of ownership.
Excellent resistance to:
- Water and potable water systems
- Petroleum oils and hydraulic fluids
- Greases
- Aliphatic hydrocarbons
Limited capability with:
- Mild acids and bases
- Intermittent exposure to alcohols
Not compatible with:
- Strong acids and oxidizers
- Ketones
- Aromatic hydrocarbons
- Chlorinated solvents
Sizes & Measurements
This 36-size industrial assortment includes the following AS568 inch sizes:
- -005 3/32" ID × 7/32" OD × 1/16" CS (25 pcs)
- -006 1/8" ID × 1/4" OD × 1/16" CS (25 pcs)
- -007 5/32" ID × 9/32" OD × 1/16" CS (25 pcs)
- -008 3/16" ID × 5/16" OD × 1/16" CS (25 pcs)
- -009 7/32" ID × 11/32" OD × 1/16" CS (25 pcs)
- -010 1/4" ID × 3/8" OD × 1/16" CS (25 pcs)
- -011 5/16" ID × 7/16" OD × 1/16" CS (25 pcs)
- -012 3/8" ID × 1/2" OD × 1/16" CS (15 pcs)
- -013 7/16" ID × 9/16" OD × 1/16" CS (10 pcs)
- -014 1/2" ID × 5/8" OD × 1/16" CS (10 pcs)
- -015 9/16" ID × 11/16" OD × 1/16" CS (10 pcs)
- -016 5/8" ID × 3/4" OD × 1/16" CS (10 pcs)
- -017 11/16" ID × 13/16" OD × 1/16" CS (10 pcs)
- -018 3/4" ID × 7/8" OD × 1/16" CS (10 pcs)
- -110 3/8" ID × 9/16" OD × 3/32" CS (15 pcs)
- -111 7/16" ID × 5/8" OD × 3/32" CS (10 pcs)
- -112 1/2" ID × 11/16" OD × 3/32" CS (10 pcs)
- -113 9/16" ID × 3/4" OD × 3/32" CS (10 pcs)
- -114 5/8" ID × 13/16" OD × 3/32" CS (10 pcs)
- -115 11/16" ID × 7/8" OD × 3/32" CS (10 pcs)
- -116 3/4" ID × 15/16" OD × 3/32" CS (10 pcs)
- -117 13/16" ID × 1" OD × 3/32" CS (7 pcs)
- -118 7/8" ID × 1-1/16" OD × 3/32" CS (7 pcs)
- -119 15/16" ID × 1-1/8" OD × 3/32" CS (7 pcs)
- -120 1" ID × 1-3/16" OD × 3/32" CS (7 pcs)
- -121 1-1/16" ID × 1-1/4" OD × 3/32" CS (7 pcs)
- -210 3/4" ID × 1" OD × 1/8" CS (10 pcs)
- -211 13/16" ID × 1-1/16" OD × 1/8" CS (10 pcs)
- -212 7/8" ID × 1-1/8" OD × 1/8" CS (10 pcs)
- -213 15/16" ID × 1-3/16" OD × 1/8" CS (7 pcs)
- -214 1" ID × 1-1/4" OD × 1/8" CS (7 pcs)
- -215 1-1/16" ID × 1-5/16" OD × 1/8" CS (7 pcs)
- -216 1-1/8" ID × 1-3/8" OD × 1/8" CS (7 pcs)
- -217 1-3/16" ID × 1-7/16" OD × 1/8" CS (7 pcs)
- -218 1-1/4" ID × 1-1/2" OD × 1/8" CS (7 pcs)
- -219 1-5/16" ID × 1-9/16" OD × 1/8" CS (7 pcs)
Part Number: K436X36N70-FDA/NSF61
Standard: AS568 Inch Sizes
Applications & Use Cases
This kit is ideal for maintenance, repair, and production environments where compliance and reliability are non-negotiable. Common applications include potable water systems, pumps, valves, filtration equipment, food and beverage processing machinery, general industrial hydraulics, and OEM service departments that need fast access to trusted sealing solutions.
Key Specifications
- Material: Buna-N (Nitrile Rubber)
- Durometer: 70 Shore A
- Color: Black
- Certifications: FDA compliant, NSF/ANSI 61
- Temperature Range: -40° to +225°F (–40° to +107°C)
- Standard: AS568 Inch Sizes
Why Buy from The O-Ring Store LLC
When you buy from The O-Ring Store LLC, you are not just buying an O-Ring kit. You are getting ISO9001:2015 certified quality processes, USA-based inventory for fast delivery, and a team that actually cares whether you succeed. We stock what others backorder, ship same day on in-stock kits, and back every order with technical support from people who know seals, not call centers.
We also provide full lot traceability and documentation on request, custom kitting options, and practical guidance to help you select the right O-Ring the first time. That is how we make getting O-Rings easy.
