Automotive
Construction
Agriculture
Livestock
Planting
Spray
BSP Plug Adapter
Built on the 55° Whitworth thread standard, they deliver reliable sealing, easy maintenance, and full interchangeability — meeting the highest international standards.
If you’re looking for uninterrupted productivity and connections that keep your operation running at full pace, Helesul BSP adapters are the right choice.
- Dimensions Table
- Technical Details
- Applications
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BSP |
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Nominal Size |
External Thread (d) [mm] |
Internal Thread (D) [mm] |
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G 1/8"-28 |
9,7 |
8,6 |
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G 1/4"-19 |
13,2 |
11,4 |
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G 3/8"-19 |
16,7 |
15 |
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G 1/2"-14 |
21 |
18,6 |
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G 5/8"-14 |
22,9 |
20,6 |
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G 3/4"-14 |
26,4 |
24,1 |
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G 1"-11 |
33,3 |
30,3 |
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G 1.1/4"-11 |
41,9 |
39 |
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G 1.1/2"-11 |
47,8 |
44,9 |
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G 2"-11 |
59,6 |
56,7 |
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- Applicable standards: ISO 8434-6;
- Maximum operating pressure: 420 bar (6,000 PSI);
- Working temperature: -30°C to +120°C;
- Body material: carbon steel;
- Surface finish: trivalent zinc plating;
- O-ring: NBR 90 Shore A;
- Certification: ISO 9001.
The versatility of BSP adapters allows their use at critical points across a wide range of equipment, where performance is paramount.
In Agricultural Implements
In self-propelled sprayer lines, precision is everything. BSPP adapters ensure leak-free connections between the manifold and hoses, preventing drips that cause chemical waste and uneven application.
In high-precision planters, they guarantee a constant oil flow to the hydraulic motors of the seed metering units — a crucial factor for maintaining the desired plant stand throughout long planting operations.
In Road Equipment
In hydraulic tipping of dump bodies, BSPT models demonstrate their robustness by withstanding the extremely high pressures generated when lifting heavy loads, maintaining system stability cycle after cycle.
For the operation of lowbed trailers, 90° elbow adapters optimize hose routing in confined spaces, protecting the circuit against impact and abrasion.
The BSPP (Parallel) thread is cylindrical and its sealing depends on an O-ring housed in a recess. It is ideal for systems that require frequent assembly and disassembly. The BSPT (Conical) thread, in turn, seals due to the tightening and deformation of the threads themselves (metal-to-metal), being the preferred choice for high pressure applications and permanent installations under continuous vibration.
No. There are three completely different thread standards (BSP 55°, JIC 37°, SAE 45°). Mixing standards results in unsafe connections, leaks and permanent damage to components. Always check the standard of your system before any replacement. Although conversion adapters exist, they can introduce restriction points into the flow.
With correct installation, a BSP adapter can last more than a decade. Maintenance is simple: biannual visual inspections in search of leaks or corrosion, external cleaning and, in the case of BSPP, changing the O-ring whenever the connection is broken. Avoid over-tightening, which is one of the main causes of thread failure.
Use PTFE tape if the connection will be retightened periodically. Prefer anaerobic sealant for permanent sealing and greater vibration resistance.
The standardized 55° Whitworth thread (parallel BSPP or tapered BSPT) ensures global interchangeability, simplifying maintenance and parts replacement anywhere. The sealing — achieved via a confined O-ring or metal-to-metal contact — is engineered to eliminate leaks even under intense field or road vibrations, protecting hydraulic fluid from contamination and ensuring a safer work environment. Made from high-strength steel with corrosion-resistant treatment, these components withstand pressure spikes and exposure to fertilizers and moisture, delivering long service life without surprises.
All Helesul hydraulic adapters are manufactured to ISO, SAE, and DIN standards, guaranteeing interchangeability, safety, and reliable field performance.
