Model 51214: Straight Compression Fitting for 1/2" Outer Diameter Airline | 1/4" Male NPT

KL 51214

$8.69
$8.69 $8.69

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PROP 65 WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

MODEL 51214: 1/4" MALE NPT STRAIGHT COMPRESSION FITTING FOR 1/2" O.D. TUBE

HIGH-VOLUME TRANSITION FOR OPTIMAL AIRFLOW EFFICIENCY

Maximize the pneumatic delivery of your onboard air loop with the premium Kleinn Model 51214 Straight Compression Fitting. This versatile, high-volume plumbing interface is custom-engineered to adapt a large-diameter 1/2" air line down to a standard 1/4" NPT port, making it a staple hardware component for custom builders looking to optimize airflow efficiency without upsizing every single port in their system. By routing a massive, unhindered fluid path directly to your supply lines, it effectively prevents air starvation to your heavy-duty tools or high-velocity train horns.

ROCK-SOLID MECHANICAL COMPRESSION LOCKING

The Model 51214 features a straight inline layout that simplifies your plumbing configurations, ensuring a clean and efficient routing path under the chassis. Outfitted with precision-cut 1/4" Male NPT threads on one side, the opposite end utilizes a robust compression nut and ferrule system to form a permanent mechanical grip on standard 1/2" Outside Diameter (O.D.) tubing—requiring absolutely no specialized pipe-flaring tools. This heavy-duty architecture delivers a rock-solid, leak-proof barrier built to easily handle high operational pressures and continuous automotive road vibrations.

Why Choose the 51214 Compression Fitting?

  • High-Volume Line Adapter: Effortlessly links larger 1/2" O.D. supply lines to standard 1/4" NPT receiver bungs on air tanks, manifolds, or electronic solenoids.
  • Airtight Compression Seal: Pre-matched heavy mechanical nut and sleeve ferrule deliver a high-pressure, leak-proof connection that resists vacuum drop-offs.
  • Direct Inline Flow: Straight design maintains unhindered pneumatic transit, reducing restriction and keeping downstream air horns running at peak volume.
  • Rugged Under-Vehicle Build: Precision-machined industrial casing provides extreme structural durability and superior resistance to environmental road corrosion.

THE VERDICT: The definitive straight adapter for large-to-small line integration. The Model 51214 marries a robust mechanical compression sleeve with a high-flow inline configuration to guarantee your high-capacity air lines remain completely secure and leak-free.

What's Included in the Box

  • Compression Fitting: One (1) Model 51214 Straight 1/4" Male NPT to 1/2" O.D. Tube adapter body.
  • Locking Hardware: One (1) pre-matched compression nut and sleeve ferrule pack.

🔴 PRO TIP: Ensure a permanent, zero-leak lock on your air lines. Before snugging down the compression nut with your standard service wrenches, use a dedicated pneumatic hose cutter to ensure your 1/2" O.D. high-pressure line is sliced completely square and smooth. Always add a few drops of liquid anaerobic compound like our genuine Kleinn JUICE to the Male NPT threads to completely insulate against slow, phantom pressure leaks.

PRODUCT SPECIFICATIONS

Feature Details
Part Number KL 51214 (51214)
Fitting Type Straight Inline Mechanical Compression
Thread Connection Size 1/4" Male NPT (National Pipe Thread)
Compatible Tube Sizing 1/2" O.D. (Outer Diameter) High-Pressure Tubing
Installation Hardware Compression Ferrule Sleeve & Threaded Locking Nut 
Primary Utility Application Adapting 1/2" O.D. airlines down to standard 1/4" NPT ports
Component Weight 0.1 lbs

 

Model 51214: Straight Compression Fitting for 1/2" Outer Diameter Airline | 1/4" Male NPT

$8.69

Does it come with a warranty?

Kleinn Automotive Accessories Limited Warranty

Kleinn Automotive Accessories stands behind the quality and craftsmanship of our products. Our products are covered against defects in materials and workmanship when properly installed and used under normal operating conditions, subject to the terms below.

One-Year Limited Warranty

Unless otherwise specified, Kleinn Automotive Accessories products are covered by a 1-year limited warranty from the original date of purchase.

This warranty applies to the original purchaser and covers defects in materials and workmanship under normal use.

If a product is determined to have a covered warranty defect, Kleinn Automotive Accessories will, at its discretion, repair or replace the defective product or component.

What Is Not Covered

This warranty does not cover damage or failure resulting from:

  • Improper installation
  • Misuse, abuse, or improper operation
  • Use outside the product's intended application or specifications
  • Modification or alteration of the product
  • Accidents or physical damage
  • Electrical damage
  • Environmental damage or exposure
  • Normal wear and tear

Kleinn Automotive Accessories is not responsible for installation or removal charges, diagnostic fees, labor costs, vehicle downtime, loss of use, or other incidental or consequential expenses associated with warranty service.

Warranty Claims

To request warranty service, email warranty@kleinn.com with the following information:

  • A copy of your original sales receipt or proof of purchase
  • Your full name
  • Email address
  • Telephone number
  • A brief description of the issue

A Kleinn representative will review your claim and may first attempt to resolve the issue through technical support.

If the product needs to be returned for inspection, Kleinn will provide a Return Authorization (RA) number and return instructions. Products should not be returned without prior authorization.

Once received, the product will be inspected to determine whether the issue is covered under warranty. If a covered defect in materials or workmanship is confirmed, Kleinn will, at its discretion, repair or replace the defective product or component.

If inspection determines that the product does not have a covered warranty defect, the product may be returned to the customer, and the customer will be responsible for applicable return shipping costs.

This limited warranty gives you specific legal rights. You may also have other rights, which vary from state to state.

Kleinn Automotive Accessories
4045 N. Highway Drive, Tucson, AZ 85705
Tel (520) 579-1531

What's the returns policy?

How To Return An Item

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.

Return Non-Exceptions

Merchandise that has been worn, used, or altered will not be accepted for return or exchange.

Restocking Fee

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.

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