ATI Vented Lockable Refueling Tank Cap is a locking tank cap with key. Provides protection and security for ATI Refueling Tanks when you do not have an attached transfer pump.
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ATI Vented Lockable Refueling Tank Cap — Keyed Security for ATI Tanks
Lock Down Your Fuel Supply
- Free Pre-offer Spec Review -- We confirm with-base or without-base style for your ATI tank before you order
- Free Shipping -- Ships free to your site via standard parcel delivery
Price range: $29.00 through $39.00
🔒 100% Secure Checkout
Free Returns 30-day hassle-free returns.
Free Delivery Every order, every time.
Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.
In the box
- 1x ATI Vented Lockable Refueling Tank Cap
- Keys (included)
Lock Down Your Fuel Supply
Secure your fuel with the ATI Vented Lockable Refueling Tank Cap. This industrial-grade cap includes a keyed lock to prevent unauthorized access to your ATI Refueling Tanks — critical when you're running without an attached transfer pump. The vented design allows proper pressure equalization during storage and refueling. Available in two configurations, with base or without base, to match your specific tank setup. A field-proven accessory that keeps your fuel where it belongs. Ships free.
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Keyed Lock Included
Vented Design
2 Style Options
Ships Free
2
Style Configurations
1
Key Included
Vented
Pressure Relief
Right Cap, Right Tank — Verified Before It Ships
The wrong cap on a refueling tank creates two problems: fuel theft vulnerability and pressure buildup that can damage your tank or create a spill risk. At Tank Vault, we verify your tank configuration and cap style before the order ships. This cap is spec'd for ATI Refueling Tanks without an attached transfer pump, available with base or without base to match your existing setup. No guessing, no returns because the threads didn't match. We catch the wrong fit before it becomes your problem. That's the Tank Vault standard — we spec it right before it ships, or we don't ship it.
Keyed Lock Stops Fuel Theft on Site
Unauthorized fuel access is a direct cost to your operation — and it happens more often on job sites without pump-attached tanks. This ATI vented lockable cap uses a keyed lock mechanism to secure fuel when your refueling tank operates without a transfer pump. The vented design maintains proper pressure equalization so the tank breathes correctly while staying locked. Industrial-grade construction means the lock and cap body hold up to daily site use, weather exposure, and repeated access cycles. It's a simple component, but the wrong one leaves your fuel exposed.
Two Configurations to Match Your Setup
Not every ATI Refueling Tank uses the same cap configuration. That's why this lockable cap comes in two styles: with base and without base. The with-base option includes the mounting base for tanks that require it, while the without-base version threads directly onto tanks that already have a base installed. Selecting the wrong style means the cap won't seat properly — creating a leak path or a lock that won't engage. Check your existing tank fitting before ordering, or contact Tank Vault and we'll confirm the correct style for your specific ATI tank model.
Compatibility Check
Confirm your setup before ordering.
- Designed for ATI Refueling Tanks
- Select 'with base' or 'without base' to match your existing cap configuration
- Intended for use on tanks without an attached transfer pump
Where This Cap Fits
Built for operations that need to secure refueling tanks on-site.
Construction Yards
Farm Fuel Storage
Municipal Fleets
Remote Job Sites
Full specifications
At a glance
- Dimensions
- See product page
- Surface
- See product page
Full specifications4 data points across 4 categories
Dimensions
| Dimensions | See product page |
|---|
Power & Performance
| Venting | Vented |
|---|
Materials
| Materials | See product page |
|---|
Compliance & Warranty
| Style Options | With base, Without base |
|---|
The Tank Vault Promise
Every product we carry is vetted for real-world performance. If it doesn't meet our standards, it doesn't make the cut.
30-Day ReturnsUninstalled, original packaging — contact us immediately if there's an issue and we resolve it without the runaround.
Free ShippingLTL delivery to your site at no extra charge. Call for liftgate or job-site delivery options.
Free Pre-offer Spec ReviewWe verify your application and requirements before you order so you get the right part the first time.
★★★★★
“Ordered the without-base style after confirming with Tank Vault's team. Fit our ATI tank exactly, lock mechanism feels solid, and the vented design keeps pressure where it should be. Simple part, but getting the right one matters — saved us a return by catching the base question upfront.”
Frequently Asked Questions
This cap is spec'd specifically for ATI Refueling Tanks. Thread pitch and base dimensions are built to ATI specifications and may not match other manufacturers. If you have a different tank brand, contact Tank Vault before ordering — we'll confirm fitment or direct you to the correct cap for your specific tank manufacturer. Guessing on thread compatibility leads to leaks and returns.
The with-base option includes the mounting base as part of the cap assembly, designed for ATI tanks that need a complete cap replacement. The without-base option is just the locking cap itself, meant to thread onto an existing base already installed on your tank. Installing the wrong style will result in improper seating — the cap won't seal or lock correctly. If you're unsure which style your tank requires, send us a photo of your current cap and fitting, and we'll confirm before you order.
The vented design allows pressure equalization for proper tank breathing during fuel storage and temperature changes. However, fuel compatibility depends on your specific ATI Refueling Tank model and its rating, not just the cap. Verify that your tank is rated for your fuel type before installation. If you need confirmation, contact Tank Vault with your tank model number and fuel type — we'll verify the full system compatibility.
This cap ships with keys included. If you lose your keys after installation, you'll need to contact the cap manufacturer or a locksmith — Tank Vault does not maintain key code records for individual cap orders. For operations where key loss is a concern, consider keeping a spare key in a secured location on site. This is standard practice for keyed fuel security components across the industry.
This cap ships free via standard parcel delivery. Lead time depends on current inventory — most caps ship within a few business days. If you have a deadline, contact us before ordering and we'll confirm the expected ship date. Tank Vault does not guarantee specific delivery dates for parcel shipments, but we'll give you an honest timeline so you can plan accordingly.
This lockable cap is designed for ATI Refueling Tanks that do not have an attached transfer pump. If your tank already has a pump assembly with its own dispensing nozzle and cap configuration, this product is not the correct replacement part. Using it on a pump-equipped tank may not fit or seal properly. Contact Tank Vault with your tank and pump model details, and we'll identify the right cap or component for your setup.
Tank Vault offers a 30-day return window for uninstalled items in original packaging. If you receive the wrong cap style, contact us immediately and we'll coordinate the correct replacement. However, checking your tank's existing fitting before ordering prevents downtime. That's why we offer free pre-offer spec review — tell us your ATI tank model and current cap setup, and we'll confirm the right style before you order.
The Tank Vault Promise
Every product we carry is vetted for real-world performance. If it doesn't meet our standards, it doesn't make the cut.
30-Day Returns
Uninstalled, original packaging — contact us immediately if there's an issue and we resolve it without the runaround.
Free Shipping
LTL delivery to your site at no extra charge. Call for liftgate or job-site delivery options.
Free Pre-offer Spec Review
We verify your application and requirements before you order so you get the right part the first time.
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