Wide range of square head plugs in stock
A square head plug is a critical, yet often overlooked, component used to seal the ends of pipes, fittings or valves that are not currently in use. Designed with a distinct square projection on its head, these plugs allow easy tightening and removal using a standard wrench, making them ideal for maintenance, testing ports or temporary closures.
Their primary function is to:
- prevent leaks
- maintain system pressure
- protect internal components from contaminants
At M.E.G.A. S.p.A., our square head plugs are engineered for precise fit and long-term reliability, helping professionals reduce downtime and eliminate uncertainty related to component quality.
Discover all our head plugs here.
The role of threaded plugs in industries
Threaded plugs are widely used in industrial landscape, including:
- oil & gas platforms
- manufacturing plants
- petrochemical facilities
- hydraulic and pneumatic systems
- process instrumentation
Choosing the right square head plug is essential to meet industry standards, environmental conditions, and media compatibility. Our solutions are designed to ensure safety, efficiency, and compliance across all applications.
Key applications for square head plugs
- hydraulic and pneumatic systems
- oil & gas industry
- chemical processing plants
- industrial machinery and manufacturing
- marine and offshore applications
- HVAC systems
Thread types: NPT vs BSP square head plugs
Choosing the correct thread type is essential for leak-free performance. M.E.G.A. S.p.A. offers both NPT and BSP square head plugs to meet international and UK standards.
NPT (national pipe taper)
- tapered thread profile
- metal-to-metal sealing
- usually requires PTFE tape or sealant
- ideal for high-pressure applications
BSP (british standard pipe)
Available in two versions:
- BSPP (parallel)
- seals with washer or O-ring
- easy disassembly and reassembly
- BSPT (tapered)
- sealing through thread interference
- requires sealant, similar to NPT
Material options for square head plugs
Selecting the right material ensures durability, safety, and long service life.
Stainless steel square head plugs (304 / 316)
- excellent corrosion resistance
- suitable for aggressive environments
- ideal for marine, food, pharmaceutical and petrochemical sectors
Carbon steel square head plugs
- high mechanical strength
- suitable for high-pressure applications
- often galvanised for added protection
Finishes and coatings
Available finishes include:
- natural finish
- galvanised
- electropolished
- precision-machined NPT and BSP threads
Each finish enhances corrosion resistance, durability or hygiene depending on the application.
Buy with confidence: register to access prices
To view prices and purchase our plug square head fittings, registration is required. This allows you to see your personalized pricing based on your company profile and enjoy a seamless shopping experience. Sign up today to take advantage of tailored offers, fast order processing, and dedicated support from the M.E.G.A. team.
Frequently Asked Questions (FAQ)
1. What is a square head plug used for?
To seal unused ports, prevent leaks and protect systems from contaminants.
2. NPT vs BSP square head plugs: which one should I choose?
Depends on system standards and sealing requirements. BSP is common in the UK, NPT is widely used internationally.
3. Which material is best for square head plugs?
Stainless steel 316 offers the highest corrosion resistance.
4. How can I ensure a leak-free installation of a square head plug?
Clean threads, use the correct sealant and test the system after installation.
5. Can I buy square head plugs online in bulk?
Yes, M.E.G.A. S.p.A. supports bulk ecommerce orders with fast UK delivery.
6. Why choose a square head plug over other types?
Easy installation and removal using a standard wrench, ideal for maintenance and industrial use.
