1B4218 Washer

1B4218 is a flat copper washer used in sealing applications with Caterpillar equipment. It is installed with a 5/16-inch bolt and is intended for use at a joint between mating surfaces where the washer helps limit leakage and contamination.

This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts). The Caterpillar name identifies the manufacturer of the engines and machines for which the washer is specified; it does not identify the manufacturer of this part.

The washer is listed for Caterpillar engines and machines in the 3116, 3126, 3208, 3508, 3508B, 3512, 3512B, 3512C, 3516 and 3516B model series. The fitment information applies to the listed Caterpillar equipment models and should be checked against the machine configuration and the part number removed during service.

Fitment

• Caterpillar 3116
• Caterpillar 3126
• Caterpillar 3208
• Caterpillar 3508
• Caterpillar 3508B
• Caterpillar 3512
• Caterpillar 3512B
• Caterpillar 3512C
• Caterpillar 3516
• Caterpillar 3516B

Cross-reference numbers

The washer is identified by the Caterpillar part number 1B-4218. The compact SKU format for the same number is 1B4218.

Specifications

The dimensional data identifies the washer by its internal diameter, external diameter and thickness. The listed length, width and depth values are included as supplied for the part. The copper material and flat washer profile correspond to the stated sealing application on the specified Caterpillar engines and machines.