Pro-Form 400i PFTL59515.4 Treadmill Locking Latch Pin 358342 (KP421)

## ProForm 400i Treadmill Locking Latch Pin

The ProForm 400i PFTL59515.4 treadmill locking latch pin is a replacement hardware component designed for the treadmill’s locking latch assembly. It helps replace a missing, worn, or damaged latch pin so the original locking mechanism can function as intended. If you need a ProForm 400i treadmill latch pin, this part provides a direct product match for the model and part references listed below.

Product Details and Benefits

This ProForm treadmill locking latch pin carries the part number **358342**, with the additional reference **KP421**. It is identified by SKU **MX421** and is listed for the **ProForm 400i treadmill, model PFTL59515.4**.

A locking latch pin is a small but important piece of treadmill hardware. It fits into the related latch mechanism and helps hold the latch in its intended position. Replacing the pin can restore the function of the existing assembly when the original pin has been lost or damaged.

The product listing does not provide dimensions, material, color, or finish specifications. For that reason, compare the original pin and the model information before ordering. Matching the part number and treadmill model gives you the best way to confirm that this is the correct component for your equipment.

This item is intended for repair or part replacement rather than general treadmill use. It does not represent a complete latch assembly or a complete treadmill component system. The product name identifies it specifically as a locking latch pin.

Compatibility and Applications

The **ProForm 400i PFTL59515.4 treadmill locking latch pin** is listed for use with the following equipment:

- **Brand:** ProForm
- **Treadmill model:** 400i
- **Model number:** PFTL59515.4
- **Part number:** 358342
- **Reference number:** KP421
- **SKU:** MX421

Use this part when servicing the locking latch on a compatible ProForm 400i treadmill. It may suit customers replacing a missing latch pin, but buyers should confirm that their existing treadmill and latch assembly match the information above. Compatibility should not be assumed for other ProForm treadmill models or for equipment from another brand unless the part references match.

Why Choose This Product

Choosing the correct latch pin can make a repair more straightforward and help you avoid replacing an entire assembly when only the pin needs attention. This product also gives you several identification points—model number, part number, reference number, and SKU—to help compare it with your original component.

The part is a practical choice for treadmill owners, repair technicians, and customers maintaining a ProForm 400i. It is useful when the original locking latch pin is no longer available, has been misplaced, or requires replacement.

Before You Buy

Check your treadmill’s brand and model before placing an order. Confirm that it is a **ProForm 400i PFTL59515.4** and compare the original part with **358342** or **KP421**. The listing does not specify dimensions, material, installation instructions, warranty, or package quantity, so verify those details if they are important for your repair. The listed product SKU is **MX421**.