1121102 HNBR O-Ring for Caterpillar Equipment

This product is a standard HNBR O-ring used as a sealing component in Caterpillar engine and generator equipment. It is listed for Caterpillar 3412D, 3412E, 3512C, 3612, 3616, G3406, and SR4 models. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The sealing element is made from hydrogenated acrylonitrile butadiene rubber (HNBR) with a nominal hardness of 78 Shore A. The supplied component is an individual O-ring with a PTFE coating and an orange colour.

Fitment

• Caterpillar 3412D
• Caterpillar 3412E
• Caterpillar 3512C
• Caterpillar 3612
• Caterpillar 3616
• Caterpillar G3406
• Caterpillar SR4

Cross-reference numbers

• 112-1102

Specifications

• Part type: Standard O-ring seal
• Material: Hydrogenated Acrylonitrile Butadiene Rubber (HNBR)
• Material designation: HNBR (78)
• Hardness: 78 Shore A
• SAE AS568 dash size: -333
• Listed size: 333
• Coating: PTFE (polytetrafluoroethylene)
• Colour: Orange
• Temperature range: -40 °F to 275 °F
• Cross-section diameter: 0.21 in
• Inner diameter: 2.48 in
• Outside diameter: 2.895 in
• Approximate weight: 0.1 lb
• Length: 7.4 cm
• Width: 7.4 cm
• Depth: 0.5 cm

Application details

The part is specified for use in Caterpillar equipment identified by the model numbers above. The component is a sealing ring rather than a complete seal kit; the product data identifies one O-ring with the listed dimensions, material, coating, and temperature range.