Model 51418: Straight Compression Fitting for 1/4" Outer Diameter Airline | 1/8" Male NPT

KL 51418

$6.49
$6.49 $6.49

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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 51418: 1/8" MALE NPT STRAIGHT COMPRESSION FITTING FOR 1/4" O.D. TUBE

PRECISION THREAD REDUCTION & HIGH-PRESSURE ADAPTATION

Bridge the gap between specialized hardware and your core air system infrastructure with the premium Kleinn Model 51418 Straight Compression Fitting. Precision-engineered to deliver a clean, tool-free reduction bridge, this adapter connects standard 1/4" O.D. air supply lines to smaller 1/8" NPT female ports seamlessly. It serves as an essential adapter for integrating specialized dashboard accessories—such as small-scale solenoids, air pressure gauges, or specific monitoring switches—directly into your primary air system network.

AIRTIGHT MECHANICAL COMPRESSION SECUREMENT

The Model 51418 features a slim, inline straight profile that optimizes routing space where every fraction of an inch counts under the dash or along frame rails. Outfitted with a standard 1/8" Male NPT thread on one end, the opposite side uses a mechanical compression assembly to grip onto standard 1/4" Outside Diameter (O.D.) tubing. Its high-quality matching nut and ferrule system create a permanent mechanical grip built to easily handle high PSI levels and resist continuous automotive road vibrations.

Why Choose the 51418 Compression Adapter?

  • Specialized Thread Transition: Connects standard 1/4" O.D. air tubing directly to smaller 1/8" NPT ports without stacking bulky adapter fittings or reducers.
  • Airtight Compression Seal: Pre-matched nut and compression sleeve ferrule create a high-pressure mechanical bond without needing specialized tube flaring tools.
  • Compact Inline Profile: Low-profile straight engineering fits perfectly into ultra-tight spots behind dashboard panels, consoles, or inside small engine bays.
  • Industrial Strength Casing: Precision-machined to ensure thread accuracy and long-term resistance to corrosion and high-pressure fatigue.

THE VERDICT: The definitive straight reducer for accessory integration. The Model 51418 blends a reliable mechanical compression sleeve with a space-saving 1/8" NPT footprint to guarantee your gauges, solenoids, and switches remain perfectly piped and completely leak-free.

What's Included in the Box

  • Compression Fitting: One (1) Model 51418 Straight 1/8" 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 accessory lines. Before snugging down the compression nut with your standard tools, use a sharp, dedicated hose cutter to slice your 1/4" O.D. high-pressure line completely square and smooth. Always add a few drops of liquid anaerobic compound like our genuine Kleinn JUICE to the small 1/8" Male NPT threads to completely insulate against slow, phantom pressure leaks.

PRODUCT SPECIFICATIONS

Feature Details
Part Number KL 51418 (51418)
Fitting Type Straight Inline Mechanical Reduction Compression
Thread Connection Size 1/8" 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 standard 1/4" O.D. air lines to 1/8" NPT ports
Component Weight 0.05 lbs
Model 51418: Straight Compression Fitting for 1/4" Outer Diameter Airline | 1/8" Male NPT

$6.49

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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