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77 Series Hydraulic Crimp Fittings Supplier in China

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The 77 Series high-pressure hydraulic hose fittings are engineered for exceptional durability, fast assembly, and unmatched versatility with over 500 possible configurations. Designed as a cost-effective, permanent, and “bite-the-wire” connection solution, the 77 Series is purpose-built for high-pressure applications. Fully compatible with 77 series crimp fittings’s crimping machines, these fittings ensure every connection is solid, secure, and leak-free.
10177 hydraulic crimp fittings manufacturers Topa

10177

Male NPTF Pipe - Rigid - Straight
10C77 one piece fittings

10C77

Female Metric S - Swivel - 45° Elbow - (24° Cone with O-Ring)
11577 Flange Hydraulic crimp fittings Topa

11577

SAE Code 61 Flange Head
1GU77 crimping hydraulic hose fittings

1GU77

Female BSP Parallel Pipe - Swivel - Straight (60° Cone)
1J777 hydraulic crimp fittings Topa

1J777

Female Seal-Lok™ - Swivel - 45° Elbow
1J977 one piece hose fitting Topa

1J977

Female Seal-Lok™ - Swivel - 90° Elbow - Short Drop
1JS77 one piece fitting

1JS77

Female Seal-Lok™ - Swivel - Straight - Long
1XA77 crimp on hydraulic fitting

1XA77

Flange Head - Straight
1XN77 crimp style hydraulic hose fitting

1XN77

Flange Head - 90° Elbow
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Innovative Design, Multiple Advantages

The 77 series crimp fittings combine robust engineering with user-focused design to deliver superior performance in demanding hydraulic applications.
77 Series

Metric Hex Design

A standardized metric hex profile allows for easy wrench engagement, improving grip and preventing tool slippage during installation or maintenance. This design ensures consistent torque application, reducing the risk of overtightening or under-tightening, and speeds up service work in the field or workshop.

Reduced Push-On Force

The specially engineered internal geometry significantly lowers the insertion force needed to seat the fitting onto the hose. This not only speeds up the assembly process but also reduces operator fatigue, particularly when working with larger hose sizes or multiple assemblies in a production environment.

Material Options for Diverse Applications

Available in premium carbon steel for standard hydraulic use or stainless steel for corrosive, marine, or chemical processing environments. Both materials are precision-machined for dimensional accuracy, offering extended service life even under high vibration, high load, and extreme pressure conditions.

One-Piece Compact Structure

The one-piece design eliminates the need for additional adapters or multiple connection points. This reduces potential leak paths, simplifies system design, and enhances overall connection strength. The compact structure also saves space in tight installation areas, improving system layout flexibility.

No-Skive Technology

Fully compatible with 77 series crimp fittings’s No-Skive hoses, this design removes the need to strip the outer cover before crimping. The result is a faster, cleaner assembly process, reduced preparation time, and a lower risk of hose damage during assembly — all without compromising bite-to-wire connection integrity.

Optimized Flow Performance

Internal flow paths are designed to minimize turbulence, reduce heat build-up, and maintain consistent pressure throughout the system. This efficiency not only improves equipment performance but also extends the life of hydraulic components by reducing stress and energy loss.
77 series Crimp Fittings
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Applications

The 77 series crimp fittings are trusted across multiple high-demand sectors, where reliability, performance, and safety are non-negotiable. Designed for high-pressure spiral hose applications, they deliver consistent results even in extreme environments.
Crimp On Hydraulic Fitting construction

Construction

Ideal for excavators, cranes, bulldozers, and concrete pumps, these fittings provide leak-free performance under heavy loads and high pressures. Their compact, one-piece design allows for easier routing in tight spaces, reducing downtime and maintenance costs on job sites.
forestry equipment Topa

Forestry

Forestry machinery faces constant exposure to dirt, moisture, and heavy vibration. The 77 Series delivers durable, contamination-resistant connections for harvesters, skidders, and log loaders, ensuring dependable operation in remote, harsh environments.
Mining Loaders, Excavators & Haul Trucks

Mining

Designed to handle the abrasive, high-vibration conditions of underground and open-pit mining operations, the 77 Series provides reliable connections for haul trucks, loaders, and drilling equipment, even in high-dust and corrosive atmospheres.

Precise Specifications

Engineered to meet the highest standards in hydraulic connectivity, the 77 series crimp fittings are built for strength, durability, and versatility. Whether for standard or extreme-duty applications, these fittings deliver consistent results backed by 77 series crimp fittings’s quality assurance.

Wide Size Range

Available from ¼″ to 2″ inside diameter, covering everything from compact equipment hose assemblies to large-bore, high-flow hydraulic lines. This flexibility ensures a precise fit for virtually any high-pressure system requirement.

Compatible Media

Designed for use with petroleum-based hydraulic oils, lubricants, and compatible industrial fluids. Material options such as stainless steel further expand compatibility to cover more demanding fluid and environmental conditions.

Extensive Configuration Options

With over 500 configurations available — including straight, 45°, and 90° elbows; multiple port types (JIC, NPTF, SAE Code 61/62, DIN, ORFS) — the 77 Series offers unparalleled adaptability to suit different system designs and space constraints.

High-Pressure Capability

Specifically rated for high-pressure hydraulic systems (up to 5,000 psi), making them ideal for heavy-duty applications such as construction, mining, oil & gas, forestry, and industrial manufacturing where operational safety and system integrity are critical.

FAQ

What materials are available for 77 Series fittings?
They are available in carbon steel and stainless steel, offering strong corrosion resistance and long service life in harsh environments.
What are the pressure ratings of 77 Series fittings?
Even with dimensional updates, the pressure ratings remain unchanged, maintaining the same high-pressure performance as standard steel versions.
What end configurations are available in the 77 Series?
They come in a variety of configurations including JIC 37°, NPTF, SAE Code 61/62 flange, DIN/Metric, and Seal-Lok connections.
What are the key features of 77 Series fittings?
Features include one-piece construction, No-Skive technology, metric hex design, and easy push-on force for safer, faster assembly.
What are the main industries using 77 Series fittings?
Common markets include construction, mining, forestry, oil field service, military, and general industrial applications.
What are the benefits of the one-piece design?
The one-piece design reduces leakage paths, improves flow, minimizes heat and pressure loss, and simplifies the overall assembly process.

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Crimp Style Hydraulic fitting catalog Topa
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