Komatsu Engine Nut DK013121-8020

Komatsu Engine Nut DK013121-8020 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number DK013121-8020 is listed as Nut. Search also by the no-dash alternate number DK0131218020.

Engine book references

This part appears in Komatsu engine parts book paths such as:

• ENGINES / S6D125-1R S/N 16790-UP / FUEL SYSTEM / FUEL INJECTION PUMP (COUPLING) (NNNER PARTS)(#21669-) (0471A)
• ENGINES / S6D125-1R-FA S/N 10001-UP / ENGINE / FUEL INJECTION PUMP (COUPLING) (INNER PARTS)(#21669-) (A4010-07B1A)
• ENGINES / S6D140-1A S/N 10001-UP / FUEL SYSTEM / FUEL INJECTION PUMP (PUMP) (1/2)(#10017-11032) (0451)
• ENGINES / S6D140-1A S/N 10001-UP / FUEL SYSTEM / FUEL INJECTION PUMP (PUMP) (1/2)(#11033-11967) (0451A)
• ENGINES / S6D140-1A S/N 10001-UP / FUEL SYSTEM / FUEL INJECTION PUMP (PUMP) (1/2)(#11968-15599) (0451B)
• ENGINES / S6D140-1A S/N 10001-UP / FUEL SYSTEM / FUEL INJECTION PUMP (PUMP) (1/2)(#15600-) (0451C)

This part appears in 80 Komatsu engine book paths in our reference data.

Verification note

Always confirm final fitment by engine model, serial range, diagram callout, and part number before ordering. Hub references are provided to help buyers find the right engine section and related parts faster.

Keep Ops Moving

19PARTS organizes Komatsu engine parts around searchable engine-model hubs so rebuild shops, equipment owners, and fleet teams can identify parts and keep repairs moving.