Model 51412: Straight Compression Fitting for 1/4" O.D. Tube | 1/2" Male NPT

KL 51412

$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 51412: 1/2" MALE NPT COMPRESSION FITTING FOR 1/4" O.D. TUBE

PREMIUM OVERSIZED PORT STEP-DOWN INTEGRATION

Adapt standard lines to your high-capacity storage layout flawlessly with the premium Kleinn Model 51412 Straight Compression Fitting. Precision-engineered to handle large-to-small port transitions without stacking messy extension bushings, this heavy-duty mechanical interface hooks standard 1/4" O.D. air supply tubing straight into oversized 1/2" NPT female receiver bungs. It serves as an essential direct plumbing link for integrating distribution lines directly into high-capacity air storage tanks, heavy-duty manifolds, or high-volume upfitter manifolds.

AIRTIGHT PNEUMATIC CEILING INTEGRITY

The Model 51412 features a straight, inline pass-through configuration engineered to minimize fluid transit boundaries and preserve unhindered airflow efficiency. Outfitted with precision-cut 1/2" Male NPT threads on one side, the opposite end features a high-utility compression sleeve ferrule and matched locking nut system that clamps firmly down on your plastic air line. Built to handle extreme high-pressure demands and continuous automotive chassis vibrations, this industrial-grade adapter guarantees a permanent, professional-grade seal.

Why Choose the 51412 Compression Fitting?

  • Large-to-Small Transition: Connects standard 1/4" O.D. tubing directly to oversized 1/2" NPT ports without using multiple reduction bushings or step-down adapters.
  • Airtight Compression Seal: Pre-matched nut and mechanical ferrule system creates a permanent, leak-proof structural grip without needing specialty tube flaring tools.
  • Straight Inline Path: Direct, low-profile configuration maximizes routing cleanliness while keeping pneumatic line layouts simplified and highly efficient.
  • Industrial Strength Build: Heavy-walled construction provides superior durability and maximum corrosion resistance against under-chassis moisture and road grime.

THE VERDICT: The definitive straight step-down adapter for high-volume air networks. The Model 51412 combines heavy-duty industrial casting with clean thread transitions to guarantee your high-capacity air tank and manifold connections remain completely secure and airtight.

What's Included in the Box

  • Compression Fitting: One (1) Model 51412 Straight 1/2" Male NPT to 1/4" O.D. Tube adapter body.
  • Locking Hardware: One (1) pre-matched compression nut and sleeve ferrule kit.

🔴 PRO TIP: Ensure a permanent, zero-leak lock on your air lines. Before snugging down the compression nut with your standard tools, use a sharp, dedicated hose cutter to ensure your 1/4" 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 1/2" Male NPT threads to completely insulate against slow, phantom pressure leaks.

PRODUCT SPECIFICATIONS

Feature Details
Part Number KL 51412 (51412)
Fitting Type Straight Inline Mechanical Reduction Compression
Thread Connection Size 1/2" Male NPT (National Pipe Thread)
Compatible Tube Sizing 1/4" O.D. (Outer Diameter) High-Pressure Tubing
Installation Hardware Compression Ferrule Sleeve & Threaded Locking Nut
Primary Utility Application Adapting 1/4" O.D. air lines to 1/2" NPT ports on tanks & manifolds
Component Weight 0.1 lbs
Model 51412: Straight Compression Fitting for 1/4" O.D. Tube | 1/2" 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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