5B4399 O-Ring for Caterpillar Equipment

The 5B4399 is a standard O-ring used in Caterpillar engines and generator sets. It is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified by SKU 5B4399 and is also listed under the designation 5B-4399. The supplied application data identifies this O-ring for Caterpillar equipment in engine and generator set applications.

Fitment

The O-ring is listed for the following Caterpillar equipment models:

• Caterpillar 3013 engine
• Caterpillar 3054C engine
• Caterpillar 3054E engine
• Caterpillar 3508B engine
• Caterpillar 3512B engine
• Caterpillar 3516 engine
• Caterpillar 3516B engine

The equipment categories specified for this part are Caterpillar engine-machine applications and Caterpillar engine-generator set applications. Fitment should be checked against the equipment model and the part number before installation.

Cross-reference numbers

Specifications

The dimensional data for the sealing section is provided in inches: 0.14 in cross-section diameter, 2.56 in inside diameter, and 2.84 in outside diameter. The material is specified as NBR nitrile rubber with a hardness of 75 Shore A. The part has no coating and is supplied as a standard black O-ring.

The listed length, width, depth, and weight are provided as separate product data in centimetres and pounds. These values are included for product identification and handling records; they do not replace the O-ring cross-section and diameter measurements used for fitment verification.