70R4008S Red Dot Refrigerant Straight Compression Steel Fitting (No. 8 × No. 8)

The Red Dot 70R4008S Straight Compression Fitting is engineered for mobile HVAC systems that require a direct, inline connection between No. 8 hose and No. 8 tubing. Because it uses a compression-style interface, it creates a secure mechanical seal without the need for additional adapters.

This fitting is commonly used when transitioning from flexible hose to rigid tubing in mobile A/C systems. As a result, it helps maintain proper refrigerant flow while minimizing connection points.

In addition, the steel construction improves durability and resistance to vibration, pressure, and thermal cycling. Therefore, it performs reliably in trucks, buses, and off-highway equipment operating in demanding environments.

Because this fitting is widely cross-referenced across OEM and aftermarket catalogs, it is a trusted solution for both service repairs and new system builds.

Product Specifications

• Red Dot Part Number: 70R4008S

• Red Dot Factory Number: RD-5-7431-0P

• Product Type: Refrigerant hose fitting

• Fitting Style: Straight compression

• Material: Steel

• Fitting Size: No. 8

• Hose Size: No. 8

• Thread / Tube Size: 1/2″ tube

• Service Port: None

Common Applications

This straight compression fitting is commonly used for:

• Mobile A/C hose-to-tube connections

• Refrigerant line repairs and replacements

• Truck and bus HVAC systems

• Construction and agricultural equipment

• Custom refrigerant plumbing assemblies

As a result, it is ideal when a clean, inline hose-to-tube connection is required.

Cross References / Interchange Numbers

This part commonly interchanges with:

• Air Source / MEI: 4491S

• Alliance: ABP N83 311278

• Climatech / TRP: AB2205 / AB22050

• Four Seasons: 17852

• Mack: 4379-RD574310

• Truck Air / MEI: 08-3011B / 08-3011BS

• Volvo: RDHRD574310P

Additional references include:
550-SB1011, SB2902, 605-2011, E-808535-8, 401051, FT32011, RDT70R4008S, Weatherhead 34708E-758

Product Summary

• Configuration: Straight compression fitting

• Material: Steel

• Hose Compatibility: No. 8

• Tube Size: 1/2″

• Application: Mobile HVAC / A/C systems