About SIN LING CO., LTD

Founded in 1977, SIN LING CO., LTD has grown into Taiwan’s leading manufacturer and exporter of copper connectors and high-precision hydraulic and pneumatic fittings. Our legacy of quality and innovation is embodied in our well-recognized Plum Blossom® brand.

✦Global Manufacturer of Precision Fittings

We specialize in:

• Brass/copper connectors

• Hydraulic fittings

• Pneumatic and air fittings

• OEM/ODM services in various materials including steel, stainless steel, and aluminum

Each year, we produce and export over 10 million connectors of various types and sizes to clients worldwide.

✅ Certified Quality & Compliance

To guarantee the reliability of every product, we enforce strict quality control from raw material sourcing to final shipment.

We are proud to hold the following international certifications:

• ISO 9001 – Quality Management System

• IATF 16949 – Automotive Quality Certification

• DOT FMVSS 571.106 – Air Brake Fittings Compliance (U.S. Department of Transportation)

These certifications reflect our commitment to automotive-grade quality, especially in safety-critical applications such as air brake systems for trucks and trailers.

✦The No.1 Brand in Taiwan – Committed to Progress

We take pride in being one of the first and most established brands of copper connectors in Taiwan. Yet, we never stop improving. SIN LING continuously invests in R&D, automation, and quality testing to bring you better, safer, and more stable products.

“SIN LING is synonymous with quality” – this isn’t just our slogan, it’s our belief.

✦Let’s Build Your Next Project Together

Whether you are looking for OEM/ODM fittings or a certified air brake connector supplier, SIN LING is your trusted partner.

CNC Model	Pfiffner	GNUTTI	MIYANO	NAKAMUNA TOME	DMG MORI	CITIZEN CINCOM L20/L32
CNC Machines
Numbers	5	1	15	2	2	25
Category	High volume components	High volume components	Big size components, Forging/Casting components	Medium size components, Assembly components	Medium size components, Assembly components	Small size components
Raw material	Brass Steel Zinc alloy Stainless Aluminum	Brass Steel Zinc alloy Stainless Aluminum	Brass Steel Zinc alloy Stainless Aluminum	Brass Steel Zinc alloy Stainless Aluminum	Brass Steel Zinc alloy Stainless Aluminum	Brass Steel Zinc alloy Stainless Aluminum
Machining size	RodØ45 Hex H38	RodØ100	RodØ100	RodØ45 Hex H36	RodØ52 Hex H45	RodØ20/Ø32
Application
Max. capacity	100,000/day	100,000/day	20,000/day	30,000/day	20,000/day	60,000/day