Product Description
UL Nitrile O-Rings from Datwyler”s Parco Brand: UL-certified O-Rings combining US industry know-how with Swiss quality standards.
The Datwyler Advantage: Our UL-certified nitrile O-rings have excellent physical properties. Combine that with batch number and cure date traceability, as well as a wide variety of applications, and rest assured that you’ve made the right choice.
Key Benefits
Parco’s 4900-70 nitrile seals are ideal for use in a variety of general-purpose applications. Key features include the following:
• Outstanding resistance to compression set:
Parco 4900-70 seals had a compression set of only 14 percent after 22 hours at 212°F.
• Wide range of service temperatures:
Parco 4900-70 seals are suitable for applications ranging from -30 to +212°F.
Chemical Resistance
USE WITH
Automatic Transmission Fluid
Crude Oil
Gasoline
Propane
Water
DO NOT USE WITH
Acetone
Carbon Tetrachloride
Ethyl Acetate
Nitromethane
Toluene
Typical Values for Compound
these are the Typical values for compound
44000262
Overview
O-Rings
Material
NITRILE BUTADIENE RUBBER – NBR
O-RING SIZE STANDARD
AS568
HARDNESS (SHORE A) +/-5
70
Dash Number
014
Nominal CS
1/16
Inches CS
0.070
Nominal Size O.D.
5/8
Inches O.D.
0.629
Nominal Size I.D.
1/2
Inches I.D.
0.489
Inches I.D. Tol.
0.005
Inches CS Tol.
0.003
COMPOUND COLOUR
BLACK
TEMPERATURE RANGE
-35°F to 212°F
COMPLIANT
SHVC; ROHS3
Products & Services 
