Trek Nutsert Plug M4x13 mm W308963 bottle cage insert and eyelet

The Trek Nutsert Plug M4x13 mm W308963 bottle cage insert and eyelet is a component used to attach a bottle cage or other travel accessories to bike frames, particularly those requiring mounting with threaded eyelets. It is used to add inserts so that screws can be fitted into materials such as aluminium, carbon or other lightweight alloys.

Technical specifications

- Part number: W308963
- Dimensions: M4x13 mm (M4 screw diameter, 13 mm length)
- Material: Stainless steel (corrosion-resistant and durable)
- Used to attach a bottle cage or other accessories to bicycles, particularly for frames that do not have pre-existing mounting eyelets
- Compatibility: Designed for bicycle frames requiring the installation of bottle cages or additional accessories.