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KL 53814A
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PRECISION PORT EXPANSION & ACCESSORY INTERFACE
Upsize your primary plumbing capabilities seamlessly with the premium Kleinn Model 53814A Hex Adapter. Precision-machined to expand standard pneumatic layout paths, this commercial-grade step-up adapter allows you to convert a 1/4" Female NPT tank or manifold receiver port into a larger 3/8" Female NPT opening. It serves as an essential adapter for cleanly introducing high-volume 3/8" lines, larger solenoids, or high-flow upfitter hardware straight into your standard onboard air infrastructure.
SOLID BRASS HEX-HEAD STABILITY
The Model 53814A features a robust hex-shaped block profile that provides an optimal layout for flat wrench engagement, allowing installers to easily apply perfect seating torque without distorting the threads. Machined entirely from industrial-grade brass, it delivers a high-pressure mechanical seal capable of continuously handling high-PSI environments. Precision-cut threads maintain a snug, rigid grip under heavy automotive chassis vibration, making it ideal for plumbing custom air systems, heavy-duty distribution blocks, and high-demand train horn accessories.
THE VERDICT: The definitive threaded adapter for custom pneumatic system expansion. The Model 53814A combines a heavy-duty industrial brass casting with a low-profile footprint to guarantee your high-flow accessory ports remain completely secure and leak-free.
🔴 PRO TIP: Prevent hidden system leaks and thread fractures. When winding this hex adapter into your manifold or tank ports, avoid over-torqueing to protect the brass walls from stress cracking. Always apply a few drops of liquid anaerobic thread sealant compound like our genuine Kleinn JUICE across the 1/4" Male NPT threads to block out slow, phantom pneumatic pressure drops.
PRODUCT SPECIFICATIONS
| Feature | Details |
|---|---|
| Part Number | KL 53814A (53814A) |
| Fitting Interface Type | Threaded Hex Adapter / Step-Up Expander Nipple |
| Male Thread Connection Size | 1/4" Male NPT (National Pipe Thread) |
| Female Thread Connection Size | 3/8" Female NPT (National Pipe Thread) |
| Material Composition | Precision Industrial-Grade Solid Brass Construction |
| Primary Functional Utility | Adapting standard 1/4" NPT ports to accept larger 3/8" NPT high-volume air lines, valves, or accessories |
| Component Weight | 0.05 lbs |

$6.49
Kleinn Automotive Accessories is committed to delivering high-quality products to our customers. We stand behind the craftsmanship and materials of our products by offering a comprehensive one-year limited warranty. This warranty is extended to the original purchaser, ensuring that when our products are installed properly and used under standard conditions, they will be free from defects in workmanship and materials for a period of one year from the original date of purchase.
This warranty encompasses a promise that the product you have purchased will perform as expected under normal use conditions and will not suffer from flaws in materials or craftsmanship. However, it is important to note that this warranty does not cover any damage that results from abusive use, operation that is not in line with the product’s intended purpose, or harm resulting from exposure to harsh environmental conditions. In the event that a product is found to be defective within the warranty period following a thorough inspection, Kleinn Automotive Accessories reserves the right to either repair or replace the defective item at no additional charge to the purchaser. It is our goal to ensure that our products meet the high standards that our customers expect, but we also want to clarify that Kleinn is not responsible for covering any costs related to the installation of our products, nor are we liable for any loss or damage that may occur as a result of the repair or replacement process of any product under warranty.
Understanding the specific needs of our customers and the demands placed on certain products, Kleinn Automotive Accessories is pleased to offer an exclusive extended two-year warranty for our 6450/6650 Compressors and 730 Horns. This special warranty extension reflects our confidence in these products’ durability and performance. Eligible products under this extended warranty will enjoy all the benefits of our standard one-year warranty with an additional year of protection, totaling two years from the date of purchase. This extended warranty coverage ensures that these specific models, recognized for their robustness and reliability, receive the extra assurance customers desire for these critical components.
Should you need to initiate a return under the warranty, we have a straightforward process designed to make it as convenient as possible for our valued customers. To start, you will need to email a copy of your sales receipt, which must be dated within the past year for standard warranty claims or within the past two years for claims under the extended warranty for the 6450 Compressors and 730 Horns. This email should be directed to our Warranty Manager and include your full name, email address, telephone number, and a concise description of the problem you are experiencing.
Upon receipt of your email, a dedicated representative from Kleinn Automotive Accessories will reach out to you directly. Our first step will always be to attempt to resolve the issue through technical support, aiming to provide a quick and effective solution. If the problem cannot be addressed remotely, our representative will issue a Return Authorization number. This number is crucial as it will identify your return throughout the inspection process. You are then required to send the product back to Kleinn Automotive Accessories for a comprehensive physical inspection.
Upon inspection, if the product is determined to be defective due to issues in workmanship or materials, Kleinn will undertake to either repair or replace the product at our discretion. We are committed to ensuring that our customers receive products that meet our high-quality standards, and we will make every effort to resolve warranty claims to your satisfaction. However, if the inspection reveals that the product does not have a material defect, we will return the unit to the customer. In such cases, the shipping costs for the return will be the responsibility of the customer.
Your item must be in its original unused condition to be returned, unless there is a manufacturer defect. You must return the item within 30 days of your purchase.
1. Please email support@kleinn.com to request a refund and we will assign you a Return Authorization #.
2. Mail your returned item to:
Kleinn Automotive Accessories
Returns Department
4045 N Highway Drive
Tucson, AZ 85705
3. Include in your package a signed letter stating the reason for your return and the original receipt.
Merchandise that has been worn, used, or altered will not be accepted for return or exchange.
All returns are subject to a 15% restocking fee, which will be deducted from your refund. If shipping and handling fees were applied to your order, they are non-refundable.