# Kleinn Hex Male Nipple Adapter - 3/8In M NPT to 1/4In M NPT

The Kleinn Model 53814N is a premium hex male nipple adapter engineered to provide a secure, leak-free transition between different thread sizes within your high-pressure onboard air system. Featuring a heavy-duty, corrosion-resistant solid brass construction built to withstand demanding automotive environments, this universal plumbing component allows you to seamlessly couple a 3/8" Female NPT port to a 1/4" Female NPT port. Its integrated hex-nut center provides a solid gripping surface for wrenches during installation, ensuring you can easily achieve a tight, airtight seal while maximizing plumbing efficiency for your air horns and onboard accessories.

-   Brass construction
-   For 1/4" M NPT
-   Nipple Adapter
-   3/8" M NPT

## Details

- **Price:** 36.54 CAD
- **Vendor:** Kleinn Air Horns
- **Type:** Hardware - Singles

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 36.54 CAD | In stock |

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/kleinn-hex-male-nipple-adapter-3-8in-m-npt-to-1-4in-m-npt)
> Updated: 2026-08-31