Plug 1335631 for Caterpillar Equipment

1335631 is a drain plug used in fluid tanks or compartments on Caterpillar equipment. The part is intended for applications where a threaded plug is used to retain fluid and allow the compartment to be drained during service.

This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The plug is identified by the SKU 1335631 and is supplied as an individual hardware component. Its listed construction material is steel. The available application data covers Caterpillar engines and equipment fitted with the engine models listed below.

Fitment

The 1335631 plug is listed for use with the following Caterpillar equipment and engine models:

• Caterpillar 3126B
• Caterpillar 3176C
• Caterpillar 3304
• Caterpillar 3306
• Caterpillar 3406
• Caterpillar 3406C
• Caterpillar 3406E
• Caterpillar 3408
• Caterpillar 3408C
• Caterpillar 3408E

Fitment should be checked against the model designation and the part number required for the particular Caterpillar machine or engine. The listed applications identify the compatible equipment models but do not specify a particular tank, housing, or compartment position.

Cross-reference numbers

1335631 and 133-5631 are the same identification presented with different number formatting. No additional supplier numbers are included in the available product data.

Specifications

The source data provides both a listed part length of 1.03 inches (2.62 cm) and overall dimensions of 5.8 × 4.9 × 6.1 cm. These measurements are reproduced as supplied and are shown separately because the data does not define whether the overall dimensions refer to the packaged part, the external envelope, or a different measurement reference.

The 1-14 inch thread specification and 1.5 inch hex size are the primary dimensional details for checking the plug against the required Caterpillar application. The part’s stated function is fluid retention and draining in the applicable tank or compartment.