Komatsu Excavator Pin 21N-70-31150

Komatsu Excavator Pin 21N-70-31150 is part of the 19PARTS KOM line, developed for demanding heavy-equipment service where dependable fit, durability, and day-to-day uptime matter. This pin is manufactured in Italy in an ISO-certified facility with more than 50 years of production experience and is backed by our Keep Ops Moving™ commitment.

Why buyers choose the 19PARTS KOM line

• Manufactured in Italy for heavy-equipment applications
• Produced in an ISO-certified facility with more than 50 years of manufacturing experience
• Built for dependable performance in Komatsu assemblies
• Supported by 19PARTS and our Keep Ops Moving™ commitment

Fitment hint from source data

Source usage data links this part to Excavator, Dozer applications. Common machine models include: PC1100, PC1100SE, PC1100SP, PC1250, PC1250LC, PC1250SE, PC1250SP. Reported category/application areas: EXCAVATORS. Reported serial ranges include: 10001-UP, 20001-UP (OVERSEAS VERSION), 20001-UP, 30001-30157 (ECOT3), 30158-UP, 35001-35200 (EGR-LESS), 35001-35200 (W/O EGR, +55C DEGREE), 35201-UP (EXTREME HOT AREA ARRANGEMENT). Related or analog part numbers from source data: R21N7031150.

Part information

• Komatsu part number: 21N-70-31150
• Alternate search number: 21N7031150
• Product type: Pin

Fitment and verification

Use the model-specific hubs and diagram callouts on our site to verify the correct Komatsu part number, callout location, and serial-range fitment before ordering. The hubs provide the machine-specific authority, while this product page focuses on quality, sourcing, and buying confidence.

Brand and quality

The 19PARTS KOM line is built around practical uptime: quality-focused Komatsu replacement parts, transparent identification, and support for customers who need to keep machines working. For part number 21N-70-31150, rely on 19PARTS to help you Keep Ops Moving™.