Welded Hose Fittings

The Welded Hose Fittings manufacture!

Zhejiang Yijia Hydraulic Machinery Co., Ltd. is an industry and trade company for hardware production in China founded in 2013. The company focuses on brass fittings and customized precision parts.

Why choose us

Customized Solutions

We offer tailored hydraulic fittings and hoses designed to meet specific customer requirements. Our team works closely with clients to provide bespoke solutions that fit their unique applications and operational needs.

Our Certificate

Yijia Machinery has passed IATF 16949:2016 system certification,ISO 9001 & ISO 14001 system certification,DOT, AMECA product certification.

Rigorous Quality Control

We implement stringent quality control measures at every stage of production. Our adherence to ISO, BV, and TVU standards guarantees that each product meets the highest benchmarks for performance and safety.

Dedicated Customer Service

Our customer service team is committed to providing exceptional support and addressing any concerns promptly. We prioritize clear communication and proactive problem-solving to ensure a seamless experience for every client.

Our company provides the following products

Part#	Size	MAF
1224	R.H,NUT only	30420

Typical Applications

Oxy-Fuel Welding

Connecting an oxygen torch to a gas regulator
Oxy-Fuel Cutting

High pressure gas supply lines for oxygen cutting equipment
Oxygen Supply Systems

Industrial & Medical Oxygen Distribution Piping
Metal Fabrication

Gas welding, gas cutting, brazing and other metal fabrication applications

International Standards and Specifications for Right Hand Threads

ISO 68-1:1998

ISO general purpose screw threads

ANSI/ASME B1.1

Unified Inch Screw Threads

DIN 13

ISO metric screw threads

BS 3643

ISO metric screw threads

Part#	Size	MAF
3033	L.H,NUT only	30421

Applications of Left Hand Threaded Fasteners

Common Applications of Left-Hand Threads

Automotive Industry

Some vehicles use left-hand threaded fasteners on the left-side wheels. Because the wheels rotate anti-clockwise, using left-hand threads prevents them from loosening due to rotational forces.

Rotary Machinery

Equipment with rotating blades or cutting tools, such as saws, grinders, and turbines, often use left-hand threaded fasteners to counteract the torque applied during operation.

Bicycles and Pedals

Bicycle pedals frequently use left-hand threads on the left-side crank arm to prevent the pedal from unscrewing as the cyclist rides.

Gas and Plumbing Fittings

Some gas lines and plumbing connections use left-hand threads as a safety feature, preventing accidental connection of incompatible components.

Turnbuckles and Tensioning Devices

Left-hand threads are commonly used in combination with right-hand threads in tensioning applications, allowing for easy and precise adjustments when rotated.

Safety and Deliberate Incompatibility

In certain industries, left-hand threads are used as a security feature to prevent incorrect assembly or tampering, especially in hazardous environments.

Before Sale		After Sale
1	Sample Confirmation	1	Comprehensive service with separate after-sale team
2	Providing information consulting and technical guidance.	2	Satisfied solution while any problem identified.
3	Packaging can be customized.	3	Exclusive and unique solution provided by professional engineers.
4	Reply to your enquiry in 24 working hours.	4	New craft, new technology and other related advisory services.

Packaging & Shipping

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Our factory

Yijia Hydraulic Machinery adopts full CNC machining, with a workshop area of 3600 square meters, equipped with 100 sets of full machine tools, 60 sets of semi-automatic CNC machines, and 5 sets of inspection equipment.We have an annual production capacity of 3 million sets of brass fittings and air brake hose assemblies.

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FAQ

Q: What is the point of a left-handed thread?

A: A left-handed thread is designed to counteract movements that might cause a standard right-hand screw to loosen, ensuring components remain securely fastened even under anti-clockwise forces. Additionally, it can be used to deliberately differentiate components, such as distinguishing gas pipes from water pipes for safety reasons.

Q: How Do You Identify Left-Hand Thread on a Drawing?

A: On drawings, it is very common to mark left-hand threads on components by using the letters “LH”, making it very obvious what thread is used. It is good practice for designers to include this as it saves time later in the manufacturing process.

Q: What is the difference between a right-hand tap and a left-hand tap?

A: A right-hand tap is designed to cut threads that twist in a clockwise direction, aligning with the common right-hand thread orientation for most screws and bolts, whereas a left-hand tap cuts threads that twist in an anti-clockwise direction, used for creating left-handed threads in specific applications where counter-rotational forces or differentiation is desired.

Q: Does left-hand thread mean reverse thread?

A: Yes, a left-hand thread is often referred to as a "reverse thread" because it twists in the opposite (anti-clockwise) direction compared to the more common right-hand thread (clockwise).

Q: Can I buy samples placing orders?

A: Yes.Please feel free to contact us.

Q: What is your lead time?

A: It depends on the order quantity and the season you place the order. Usually we can ship within 7-15 days for small quantity,and about 30 days for large quantity.

Q: What is your payment term?

A: T/T,Western Union,Alipay,MoneyGram,and Paypal.This is negotiable.

Q: What is the shipping method?

A: It could be shipped by sea,by air or by express(EMS,UPS,DHL,TNT,FEDEX and ect).Please confirm with us before placing orders.

As one of the most professional welded hose fittings manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy customized welded hose fittings from our factory. Contact us for free sample.Welding hose connector 122LWA, Right Hand Nut, welded hose right hand nut