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

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1. [Macnaught Group Help](https://kb.macnaughtgroup.com/?hsLang=en-au)
2. [Find Repair Kits](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au)
3. [Air Equipment](https://kb.macnaughtgroup.com/find-repair-kits?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) - Service Kits

## 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.

- **Repair Kits** 
    - No user‑serviceable repair or rebuild kits available
    - Chucks are factory‑sealed for durability and safety
- **Failure Handling** 
    - If locking or sealing degrades after extended service, replace the unit
    - Most issues are prevented with proper cleaning and lubrication
- **Design Philosophy** 
    - Heavy‑duty, sealed construction eliminates need for routine repairs
    - Ensures consistent performance under high pressure
- **Summary** 
    - Built to operate reliably without maintenance kits
    - Replacement is the recommended solution if wear eventually occurs

- [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)