Description
Hansen 3H21NV Quick Disconnect Socket – 3HK (ISO 7241-1 Series B)
The Hansen 3H21NV is a compact 3/8 socket from the proven 3HK, designed for reliable, leak-free performance in demanding hydraulic and fluid power systems. Precision-machined components and a rugged zinc-plated steel body ensure durability, while the ISO 7241-1 Series B interchange provides full compatibility across multiple manufacturers.
As part of the original quick-coupling line invented by Fred Hansen in 1915, the HK Series remains a trusted industry standard for performance and compatibility in hydraulic applications worldwide.
Specifications
- Connection Type: 3/8-18 NPTF socket
- Valve Style: No-valve design
- Material: Zinc-plated carbon steel body; stainless-steel springs and locking balls
- Seal: Nitrile (NBR) standard seal
- Temperature Range*: -40 F to +250 F with NBR
- Interchange: ISO 7241-1 Series B
- Max Operating Pressure: 4,000 psi
- Rated Flow: 23 lpm (6 gpm)
- Nominal Flow Diameter: 7.8 mm
- Air Inclusion (max): 2.9 cc
- Fluid Loss (max): 2.1 cc
- Variation Details: No-valve configuration
*Temperature range depends on seal material.
Key Features
- Proven Hansen HK design – the original quick-coupling standard since 1915.
- ISO-B interchange for cross-compatibility with other manufacturers.
- No-valve design allows unrestricted flow through the coupling.
- Compact, push-to-connect operation with rugged zinc-plated steel construction.
Applications
- Hydraulic tools and light equipment
- Agriculture and compact construction hydraulics
- General industrial fluid power circuits
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