Value Collection ZMSCS70033 Silicone O-ring Dash 033

Product Description

The VALUE COLLECTION ZMSCS70033 is a round cross-section silicone O-ring used as a static or dynamic seal in fluid handling, pneumatic, and mechanical systems. It measures 2 inches inside diameter, 2.125 inches outside diameter, and 0.0625 inches thick, conforming to the Dash 033 standard size designation. With a hardness rating of 70 Shore A, this O-ring is classified as hard and is engineered for applications demanding a wide service temperature range, spanning -80 degrees F to 450 degrees F. Plumbers, HVAC technicians, and industrial maintenance professionals install this part where silicone's dry heat tolerance and ozone resistance are required. Each package contains 25 O-rings.

This O-ring is suited for residential and light commercial plumbing, HVAC equipment, chemical handling lines, and mechanical assemblies where exposure to oils, chemicals, or solvents is present but full oil immersion service is limited. Its silicone compound provides reliable performance in high-heat environments such as boiler connections, duct damper shafts, and pump housings. The white color aids visual inspection during installation and maintenance. Installers working in food-adjacent or sanitary environments should note this part is not FDA approved and should verify suitability against local codes and application requirements.

Key Features

• Dash 033 standard size: 2 inches ID, 2.125 inches OD, 0.0625 inches thick
• Silicone compound rated from -80 degrees F to 450 degrees F continuous service
• 70 Shore A hardness for firm sealing under mechanical load
• Round cross-section profile for standard groove fitment
• Compatible with oils, chemicals, and solvents in limited-immersion service
• Good weather and ozone resistance for outdoor or exposed installations
• Sold in a package of 25 for service stock and recurring maintenance needs

Compatibility

Designed as a standard Dash 033 silicone O-ring replacement for any system or assembly calling for a 2 inches ID round cross-section seal in that size class.

Installation Notes

Plumbers and HVAC technicians should de-pressurize and lock out the system before removing or installing O-rings. Clean the seating groove of debris, old compound, and contaminants prior to seating the new ring. Avoid using petroleum-based lubricants with silicone O-rings; use a silicone-compatible assembly lubricant if needed. Verify that silicone compound is appropriate for the specific fluid media before installation, as silicone offers limited resistance to full oil immersion.