---
title: LockNFlate XL Locking Air Chucks for Large Bore Tire Valves (Open Flow & Closed Flow – LNL65021-BSPT & LNL65022-BSPT)
description: Help
---

[Skip to content](https://kb.macnaughtgroup.com/locknflate-xl-locking-air-chucks-for-large-bore-tire-valves-open-flow-closed-flow-lnl65021-bspt-lnl65022-bspt#main-content)

- [Home](https://www.locknlube.com.au/)
- [Products](https://www.locknlube.com.au/collections/all-products)
- [Company](https://www.locknlube.com.au/pages/about-us)

Open main navigation

Close main navigation

- [Home](https://www.locknlube.com.au/)
- [Products](https://www.locknlube.com.au/collections/all-products)
- [Company](https://www.locknlube.com.au/pages/about-us)

 How can we help you?

- There are no suggestions because the search field is empty.

1. [Macnaught Group Help](https://kb.macnaughtgroup.com/?hsLang=en-au)
2. [Product Applications](https://kb.macnaughtgroup.com/product-applications?hsLang=en-au)
3. [Air Equipment](https://kb.macnaughtgroup.com/product-applications?hsLang=en-au#air-equipment)

10 February 2026

# LockNFlate XL Locking Air Chucks for Large Bore Tire Valves (Open Flow & Closed Flow – LNL65021-BSPT & LNL65022-BSPT)

## Heavy-duty LockNFlate® XL tire chucks designed for large bore (VG12/12V1) Schrader-type valves on big equipment. These right-angle locking air chucks feature a ~4″ extended nose for deep wheel recesses and six hardened steel jaws that lock onto “big bore” valve stems. Two models are offered – an Open-Flow and a Closed-Flow version – both with 1/4″ BSPT threaded inlets for compatibility with regional air hose standards (functionally identical to the 1/4″ NPT U.S. models). Once clamped on, the chuck creates a secure, leak-free connection and allows hands-free, high-volume tire inflation up to 250 PSI.

<iframe width="256" height="144.64" src="https://www.youtube.com/embed/vDnnl_GCfjs?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen title="NEW! The LockNFlate® XL &quot;Big Bore” Air Chuck for large bore VG12/12V1 tire valves" style="position: absolute; top: 0px; left: 0px; width: 100%; height: 100%; border: none;"></iframe>

- **Purpose** 
    - Designed for inflating large off‑road, industrial, and agricultural tires
    - Built specifically for **large bore VG12 / 12V1 tire valves**
- **Typical Equipment** 
    - Mining equipment (haul trucks, loaders)
    - Heavy construction machinery
    - Large agricultural tractors and combines
    - Industrial vehicles with oversized tire valves
- **Valve Compatibility** 
    - Oversized “large bore” valve stems (VG12 / 12V1)
    - Standard automotive air chucks will not fit these valves
    - Expanded collet grips large‑diameter valve stems securely
- **Access Advantages** 
    - Right‑angle design improves access to recessed or shielded valve stems
    - Ideal for: 
          - Inner wheels of dual truck tires
          - Rims with small access cutouts
          - Deep or obstructed valve locations
- **Safety & Convenience** 
    - Six steel jaws lock onto the valve stem
    - Hands‑free, leak‑free inflation
    - Allows operator to step back during inflation of high‑pressure, high‑volume tires
- **Performance** 
    - Rated to **250 PSI maximum**
    - High airflow capacity for faster inflation of large tires
- **Model Selection** 
    - **Open‑Flow (LNL65021)** 
          - For inline inflator gauges or foot‑pedal controlled air lines
          - Continuous airflow; upstream device controls air
    - **Closed‑Flow (LNL65022)** 
          - For direct connection to air hoses or compressor outlets
          - Remains closed until locked onto a valve
          - Ideal for multi‑tire inflation systems and direct tank hoses

<iframe width="560" height="315" src="https://www.youtube.com/embed/3toNYJMA-is?si=HSMBenMN4GsQh-4J" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen style="position: absolute; top: 0px; left: 0px; width: 100%; height: 100%; border: none;"></iframe>

- **Summary** 
    - Brings LockNFlate’s “locks on, stays on, won’t leak” performance to large bore valves
    - Enables safer, faster, and more controlled inflation of massive tires

- [Product Applications](https://kb.macnaughtgroup.com/product-applications?hsLang=en-au#main-content)

    - [Grease Equipment](https://kb.macnaughtgroup.com/product-applications?hsLang=en-au#grease-equipment)
    - [Air Equipment](https://kb.macnaughtgroup.com/product-applications?hsLang=en-au#air-equipment)
- [Product Troubleshooting & Maintenance](https://kb.macnaughtgroup.com/product-troubleshooting-maintenance?hsLang=en-au#main-content)

    - [Grease Equipment](https://kb.macnaughtgroup.com/product-troubleshooting-maintenance?hsLang=en-au#grease-equipment)
    - [Air Equipment](https://kb.macnaughtgroup.com/product-troubleshooting-maintenance?hsLang=en-au#air-equipment)
- [Find Repair Kits](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au#main-content)

    - [Grease Equipment](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au#grease-equipment)
    - [Air Equipment](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au#air-equipment)
- [Warranty Policy](https://kb.macnaughtgroup.com/warranty-policy?hsLang=en-au#main-content)

    - [Grease Equipment](https://kb.macnaughtgroup.com/warranty-policy?hsLang=en-au#grease-equipment)
    - [Air Equipment](https://kb.macnaughtgroup.com/warranty-policy?hsLang=en-au#air-equipment)