# HANDLING OF MATERIALS
> MSHA accident `220201500012` · 05/18/2020 · Knife River Corporation-Northwest
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** HANDLING OF MATERIALS
- **Accident type:** Caught in, under or between a moving and a stationary object
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** METAL,NEC(PIPE,WIRE,NAIL)
- **Nature of injury:** UNCLASSIFIED,NOT DETERMED
- **Body part:** WRIST
- **Days lost:** 0
- **Mine experience:** 7.15 years
## Operator
- **Controller:** MDU Resources Group Inc
- **Operator:** Knife River Corporation-Northwest
- **Mine:** [3500426](https://api.ai-analytics.org/mine/3500426)
## Narrative

Team Member removed the mantel nut on an HP-400 Cone Crusher while performing regular maintenance. Team member lost grip of the mantel nut while setting it to the side causing there right hand / wrist to be pinch between the cone liner and mantel nut.

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*