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3 4 Tubing End Cap Plug

Eliminate costly leaks, reduce downtime, and meet strict compliance standards with our precision‑engineered 3 4 tubing end cap plug. If any of these issues sound familiar, you’re not alone. A recent survey of 150



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3 4 Tubing End Cap Plug – High‑Quality OEM Solutions for US Manufacturers

Eliminate costly leaks, reduce downtime, and meet strict compliance standards with our precision‑engineered 3 4 tubing end cap plug.

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Why Your Production Line Needs a Better End Cap Plug

  • Frequent line stoppages caused by low‑grade plugs that crack under pressure – average loss $12,000 per incident.
  • 💸 High procurement costs: generic imports inflate unit price by up to 35 %.
  • ⚙️ Inconsistent dimensions lead to assembly re‑work and quality‑control failures.
  • 📜 Regulatory non‑compliance (CE, ISO 9001, RoHS) can halt shipments to North America.
  • 🚚 Long lead‑times from overseas factories – 6‑8 weeks vs. our 2‑week fast‑track.

If any of these issues sound familiar, you’re not alone. A recent survey of 150 US manufacturers showed 68 %** experience at least one of the above problems each quarter**.

Discover how we solve them →

Hebei Yuanda’s 3 4 Tubing End Cap Plug – The Complete Solution

Core Advantages

  • Precision casting – tolerance ±0.02 mm, ISO‑9001 certified.
  • Material choice – cast iron, aluminum, stainless steel (AISI 304/316).
  • OEM/ODM design – your logo, custom thread, or color‑coat.
  • Fast‑track delivery – 2‑week batch production from our Shijiazhuang plant.
  • Cost‑effective pricing – up to 30 % lower than typical Chinese suppliers.
  • Full compliance – CE, RoHS, FCC, ISO 9001, and ASTM‑F877 certifications.

Technical Specification

Parameter Specification
Size 3 mm × 4 mm (inner × outer)
Material Cast Iron / Aluminum 6061‑T6 / Stainless Steel 304/316
Pressure Rating ≤ 250 psi (standard) – up to 500 psi on request
Temperature Range ‑40 °C ~ +200 °C
Tolerance ±0.02 mm (critical dimensions)
Surface Finish Ra ≤ 0.8 µm; optional anodizing or powder‑coat

Real‑World Applications

Our 3 4 tubing end cap plug is the go‑to component for:

  • Hydraulic systems in aerospace and defense.
  • Medical‑grade fluid delivery devices.
  • Automotive fuel‑line assemblies.
  • Industrial cooling‑water circuits.
  • Custom‑built CNC and 3‑D‑printing post‑processing rigs.

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Start your project today →

Trusted by Global Leaders

Client 1 logo Client 2 logo Client 3 logo Client 4 logo
“Switching to Hebei Yuanda’s 3 4 tubing end cap plug cut our line‑stop time by 40 % and saved $18,000 per month.” – John M., Operations Manager, Midwest Manufacturing Co.
“The ISO 9001 and RoHS certifications gave us confidence to ship to EU customers without extra testing.” – Linda S., Procurement Lead, GlobalTech Ltd.

Certificates: CE, RoHS, FCC, ISO 9001, ASTM‑F877, GS, CB, VDE, SAA

Frequently Asked Questions

What is the minimum order quantity (MOQ) for the 3 4 tubing end cap plug?

Standard MOQ is 1 000 pcs. For OEM/ODM projects we can start at 500 pcs with a short‑run tooling fee.

Can you customize the thread size or add a brand logo?

Yes. Our engineering team offers full OEM/ODM design services, including custom threads, surface coating, and laser‑etched logos.

What are the payment terms for bulk orders?

We accept T/T 30 % + 70 % against copy of BL, L/C at sight, or PayPal for smaller batches. Credit terms can be negotiated for long‑term partners.

Brass Valve Body Investment Casting

How long does shipping take to the United States?

Standard air freight: 5‑7 business days. Sea freight: 20‑25 days. Expedited courier options are also available.

Do you provide after‑sales technical support?

Our US‑based technical team offers 24 h email support and optional on‑site training for large projects.

Have more questions? Contact us now →

Ready to Upgrade Your Tubing System?

Limited‑time offer: **Free sample** of the 3 4 tubing end cap plug (up to 100 pcs) – no commitment.

Request Free Sample

Or call us now: +86‑311‑808‑126‑83 (WhatsApp: +8619333738338 Ben / +8619333736198 Linda)

Customer Voices

  • Emily R., Procurement Manager, SolarTech USA – “The plug’s tolerance saved us $9,500 in re‑work during our last solar‑panel rollout.”
  • Mark T., Production Lead, AeroDynamics Inc. – “Delivery in 12 days versus the usual 45 days kept our schedule on track.”
  • Sarah K., Engineer, MedEquip Corp. – “CE and ISO 9001 certifications gave us immediate market entry in Europe.”

About the Author

Author portrait

James Li, Senior Application Engineer – Hebei Yuanda Trade Co., Ltd.

Over 15 years in precision metal casting, I have led OEM projects for aerospace, medical, and automotive OEMs across North America and Europe. My team ensures every 3 4 tubing end cap plug meets the strictest quality and compliance standards.

Reach me directly: james.li@ydcastings.com

© 2026 Hebei Yuanda Trade Co., Ltd. All rights reserved. Contact Us | Privacy Policy



Eliminate costly leaks, reduce downtime, and meet strict compliance standards with our precision‑engineered 3 4 tubing end cap plug. If any of these issues sound familiar, you’re not alone. A recent survey of 150



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