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Coupling 3/8" Galvanized Malleable Iron
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Regular price:
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Description
Coupling 3/8" Galvanized Malleable Iron
- Size: 3/8" (thread diameter: 14.9–15.4 mm)
- Female threads
- Material: Malleable iron
- Finish: Hot-dip galvanized
- Other designation: 2 270 M2
- Applications: Water supply systems, domestic installations, industrial systems, central heating, hydraulic installations

Alternative Name
Coupling 3/8" Galvanized Malleable Iron, Galvanized Female Thread Coupling, Cast Iron Coupling, BSP Female Coupling, Water Pipe Coupling, Galvanized Threaded Coupling
Information
The 3/8" galvanized coupling is manufactured from malleable iron and is designed for joining threaded pipe systems used in water, heating, and industrial installations. It features female threads on both ends, providing a durable and reliable threaded connection.
Galvanized malleable iron fittings are widely used throughout industry thanks to their durability, cost-effectiveness, and excellent availability. They are ideal for installations with moderate operating requirements, including cold and hot water systems.
Material
The coupling is manufactured from malleable iron and protected with a hot-dip galvanized coating, providing excellent resistance to corrosion and atmospheric conditions.
Technical Specifications
- Maximum working pressure: 25 bar at operating temperatures from -20°C to +120°C
- Maximum working pressure: 20–25 bar at operating temperatures from -20°C to +300°C
- Manufactured according to EN 10242
The fitting features:
- External tapered threads: R
- Internal parallel threads: Rp
Both thread types comply with ISO 7-1.
Advantages
- Hot-dip galvanized finish
- Excellent corrosion resistance
- Female threaded connection
- Durable malleable iron construction
- Cost-effective solution
- Manufactured according to EN 10242
Applications
Suitable for:
- Water supply installations
- Domestic plumbing systems
- Industrial piping systems
- Central heating installations
- Hydraulic systems
- Cold and hot water installations
Available Sizes
- 1/8"
- 1/4"
- 3/8"
- 1/2"
- 3/4"
- 1"
- 1 1/4"
- 1 1/2"
- 2"
- 2 1/2"
- 3"
- 4"
Product Range
The galvanized malleable iron fittings range includes:
- Elbows
- Reducing elbows
- Tees
- Reducing tees
- Reducers
- Short bends
- Long bends
- Couplings
- Reducing couplings
- Caps
- Plugs with flange
- Plugs without flange
- T9 plugs
- Unions with female threads
- Male unions
- Gasket unions
- Conical unions
- Straight nipples
- Reducing nipples
We also offer black malleable iron fittings without galvanized coating.
We also offer a wide range of malleable iron fittings. If you have any questions, please contact us. Call +48 63 261 42 02 or email biuro@polberis.pl.
Learn more about our threaded couplings here >>
Technical data
| Coupling Type | Coupling |
| Material | Cast Iron |
| Pressure | Pressure Range < 20 bar |
| Connection 1 | 3/8'' |
| Thread Type – Connection 1 | BSP / G / Rp / Rc Thread |
| Connection 2 | 3/8'' |
| Thread Type – Connection 2 | BSP / G / Rp / Rc Thread |
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Cast iron tee 3/8''
Cast iron tee 1/2''
Cast iron tee 3/4''
Cast iron tee 1''
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cast iron corner tee 1/2''
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- mufa do spawania
- łącznik do spawania rur
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- żeliwo ocynkowane
Extension 3/8''x1/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1/2''x1/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1/2''x3/8'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 3/4''x3/8'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 3/4''x1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1''x1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1''x3/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/4''x1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/4''x3/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/4''x 1'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2''x3/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2''x1'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2''x1 1/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2''x1'' galvanized cast iron
- żeliwo ocynkowane
Extension 2''x1 1/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2''x1 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2 1/2''x2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 3/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/4'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2" galvanized cast iron reduction
- żeliwo ocynkowane
Angle union 3/8'' galvanized cast iron F-M
- galvanized cast iron
Angle union 1/2'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 3/4'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 1'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 1 1/2'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 2'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 2 1/2'' galvanized cast iron
- żeliwo ocynkowane
Angle union 3'' galvanized cast iron F-M
- żeliwo ocynkowane
Angle union 1/2'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 3/8'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 3/4'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 1'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 1 1/4'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 1 1/2'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 2'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 2 1/2'' galvanized cast iron F-F
- żeliwo ocynkowane
Angle union 3'' galvanized cast iron F-F
- żeliwo ocynkowane
Short bend 1/2'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Union 3/8'' galvanized cast iron F-F
Union 1'' galvanized cast iron F-F
Union 2 1/2'' galvanized cast iron F-F
Union 4'' galvanized cast iron F-F
Coupling 1" socket weld A105 cl.3000
Coupling 1" socket weld 316L cl.3000
- mufa do spawania
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 3/4''-1 1/2'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1'' - 1/2'' socket weld A350 LF2 cl.3000
Coupling 1''-3/4'' socket welt A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1 1/4" socket weld 316L cl.3000
- coupling for welding
- atest 3.1
- origin: European Union
Reduction coupling 3/4" - 1'' socket weld 316L cl. 3000
Coupling 3/8''-3/4'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 3/8''-1/2'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Stainless reduction connector 1/2'' - 1/4'' 304
Coupling 1'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/2'' BSP A350 LF2 cl.3000
Coupling 3/4'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/4'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/4'' x 1/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/8'' x 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 1/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 3/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/4'' x 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/4'' x 3/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/4'' x 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1'' x 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1'' x 3/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' x 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' x 3/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/2'' x 3/4'' stainless steel 316 BSP
- stal nierdzewna gat. 316
Coupling 1 1/2'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/2'' x 1 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2'' x 1 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2'' x 1 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2 1/2'' x 2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2 1/2'' x 1 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3'' x 2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3'' x 2 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 4'' x 3'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 2 1/2'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Reduction coupling 1 1/4" x 1 1/2'' NPT 3000 A105
Coupling 1 1/2'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP 206bar 304L
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1" NPT Class 6000 (413 bar) Stainless Steel 316L (1.4404)
- pressure class: 6,000 lbs (i.e., 413 bar)
- 3.1 certification
- origin: European Union
Reducing coupling 3/4''- 1'' BSP steel
- steel coupling
Coupling 3/8" BSPT Class 3000 ASTM A105
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate
Steel reduction coupling 1/4''x1/2'' NPT
Reduction 2 1/2''x1 1/2'' galvanized cast iron screw-on
Union 1/4'' galvanized cast iron F-F
Coupling 1 1/4'' steel for welding
Coupling 2 1/2'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Reduction coupling 1/2'' x 3/4'' NPT cl.3000 A105
Coupling 1/2'' BSP stainless steel 316
Reduction coupling 2'' x 1'' NPT 3000 A105
Coupling 1/4'' x 1'' NPT 316L cl.3000
- High-Pressure coupling
- Certificate 3.1
Coupling 3/4" socket weld 316L cl.3000
- mufa do spawania
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 1/2'' x 1'' NPT 316L cl.3000
- High-Pressure coupling
- Certificate 3.1
Coupling 1/2'' x 1'' BSP cl.3000 A105 steel
- gwint standardowy polski BSP (inna nazwa G, Rp, walcowy prosty)
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 2'' steel for welding
Reducing Coupling 1/2" × 1/4" BSP Class 3000 ASTM A105
-
Polish standard thread (BSP)
Coupling 2''- 3'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1/8'' BSP stainless steel 316
Coupling 1/4'' BSP stainless steel 316
Coupling 3/8'' BSP stainless steel 316
Coupling 3/4'' BSP stainless steel 316
Coupling 1'' BSP stainless steel 316
Coupling 1 1/4'' BSP stainless steel 316
Coupling 2'' BSP stainless steel 316
Coupling 2 1/2'' BSP stainless steel 316
Coupling 3'' BSP stainless steel 316
Coupling 4'' BSP stainless steel 316
Coupling 2'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Coupling 1'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Plug 1/4'' BSP 316L Stainless Steel
- High-pressure plug
- 3.1 material certificate available on request (free of charge)
Nipple 3/8''x1/8'' galvanized cast iron
- nypel żeliwny ocynkowany
Steel nipple 3/8''- M18x1,5
- złączka wysokociśnieniowa
- nypel stalowy
Reduction 3/8''x1/8'' 316 nut-screw
- stal nierdzewna
Washer metal rubber 3/8''
- podkładka MET-GUM
- uszczelka metalowa z gumką
Stainless union 3/8'' BSP
- material: stainless steel 316
Tee 3/8'' steel male female
- thread type: BSP (standard thread, otherwise known as cylindrical, straight, Rp, G)
- material: steel
Stainless nipple 3/8'' 316
- nipple 3/8'' stainless
Steel tee 3/8” male fitting
- material: steel
Steel tee 3/8'' MMF
- BSP thread type (i.e., standard Polish, also known as cylindrical, straight, pipe, inch, Rp, G)
- steel tee ZZW
Steel nipple 3/8'' - M18x1,5
Nipple 3/8" galvanized cast iron
Steel nipple 3/8" BSP G
- steel adapter
Steel reduction nipple 3/8'' - M14x1.5 connector
Steel reduction nipple 3/8'' - M20x1,5
Stainless steel 3/8'' x 1/8'' 316
- złączka gwintowana nierdzewna
Steel reduction 7/16'' UNF - 3/8'' BSP
Nipple 3/8''x1/4'' galvanized cast iron
- nypel żeliwny ocynkowany
Nipple 3/4''x3/8'' galvanized cast iron
- nypel żeliwny ocynkowany
Cast iron elbow 3/8'' 45 deg
Reduction 1''x3/8'' galvanized cast iron screw-on
Reduction 3/4''x3/8'' galvanized cast iron screw-on
Nipple 3/8'' - M22x1,5 connector
- nypel stalowy wysokociśnieniowy
Stainless steel nipple 3/4'' x 3/8'' 316
- złączka gwintowana nierdzewna
Weld-on pipe nipple 3/8'' 316L
Stainless pipe nipple 3/8'' 100mm
Cap 3/8'' BSP A105 206bar
- pressure rating: 3000 lbs (206,9 bar) / 6000 lbs
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Stainless pipe nipple 3/8'' 40mm
Stainless tee 3/8" 316L
Union 3/8'' BSP A105 cl. 3000
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Check Valve 3/8'' Brass 25 bar
Steel pipe nipple 3/8'' 100mm
Stainless elbow 3/8'' 316
Plug 3/8'' BSP Stainless Steel 316
Cap 3/8'' stainless steel 316
- material: stainless steel 316
- certificate 3.1 at the request of the customer (free of charge)
Plug 3/8'' steel cap
Steel reduction 7/8'' UNF JIC -3/8'' BSP
- złączka wysokociśnieniowa
- stal galwanizowana
Steel hose-end fitting 13mm 3/8''
Steel reduction nipple 3/4'' x 3/8'' cone 60 degrees
- stożek wewnętrzny (doszczelnienie 60 stopni)
- złączka wysokociśnieniowa
Steel reduction nipple 3/8'' - M14x1,5
- nypel stalowy
Nipple 3/8'' BSP A105 cl.3000
Steel reduction nipple 3/8'' - M12x1,5 connector
Steel reduction nipple 3/8'' - M24x1,5
- nypel stalowy
Steel reduction nipple 3/8'' - M16x1,5
- nypel stalowy wkrętny
Steel plug 3/8'' 60 degree seal
- Steel Plug
- Thread Type: BSP (i.e., standard Polish, also known as cylindrical straight, pipe, Rp, G)
Reduction M16x1,5 - 3/8'' external internal thread
- stal galwanizowana
- redukcja wysokociśnieniowa
Plug 3/8'' BSP A105 Class 3000
Steel nipple 3/8'' BSP - 3/4'' UNF JIC fitting
- średnica gwintu A: 3/8'' wynosi: 16,3 ÷ 16,6mm
- uszczelnienie A: stożek wewnętrzny 60 stopni
- średnica gwintu B: 3/4'' wynosi: 18,7 ÷ 19mm
Screw-on reduction 3/8'' - 3/8''
Hose-end fitting 3/8'' x 11mm brass
Hose-end fitting 3/8'' x 13mm brass
Screw-in galvanized steel reduction 5/8''-3/4''
Gasket ED WD 3/8'' for steel fittings
Screw-in steel reduction 1/4'' - 3/8''
Nipple stainless elbow 3/8'' 316 male female
Reduction 3/8''x1/4'' 316 nut-screw
- stal nierdzewna
Reduction 3/4''x3/8'' 316 nut-screw
- stal nierdzewna
Stainless ball valve 3/8" 316 40bar
Hose-end fitting 3/8" x 10mm brass nipple
Hose-end fitting 3/8" x 13mm brass nipple
Hose-end fitting 3/8'' x 9mm brass
Steel reduction nipple 1/4'' NPT - 3/8'' BSP
- nypel stalowy
Stainless steel nipple 1'' x 3/8'' 316
- złączka gwintowana nierdzewna
Stainless steel nipple 3/8'' x 1/4'' 316
- złączka gwintowana nierdzewna
Hose-end fitting 3/8'' x 9mm stainless steel
- stal szlachetna 316
Hose-end fitting 3/8'' x 10mm stainless steel
- stal szlachetna 316
Hose-end fitting 3/8'' x 11mm stainless steel
- stainless steel 316
Hose-end fitting 3/8'' x 13mm stainless steel
- stainless steel 316
Hose-end fitting 3/8'' x 16mm stainless steel
- stainless steel 316
Ball valve 3/8" 316 50bar male female
- stainless steel
- pressure: 50 bar
Ball Valve 3/8" Brass Male × Female 25 Bar
Reduction nipple 1/4'' x 3/8'' cone 60 degrees
- stożek wewnętrzny (doszczelnienie 60 stopni)
- złączka wysokociśnieniowa
Reduction nipple 1/2'' x 3/8'' cone 60 degrees
- stożek wewnętrzny (doszczelnienie 60 stopni)
- złączka wysokociśnieniowa
Ball valve 3/8'' brass for water 25 bar
Stainless nipple union 3/8" BSP
Union 3/8'' BSP M-F 316L cl.3000
- uszczelnienie: stożkowe (metal-metal)
- gatunek: 316L (1.4404)
- gwint: wewnętrzno - zewnętrzny
- towar z atestem 3.1
Nipple ball valve 3/8''
Hex coupling M10x1 steel
- thread type: metric
- high pressure coupling
Hex coupling M24x1,5 steel
- thread type: metric
- high pressure coupling
Half coupling 1'' for welding
Nipple union 3/8'' sealing cone
Brass Reducing Nipple 3/8" × 1/4"
Brass Coupling 3/8" 30 Bar
Pipe nipple 3/8'' NPT 100mm A333
Union 3/8'' NPT P245GH 206bar
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Pipe nipple 3/8'' NPT 100mm A106
Pipe nipple 3/8'' NPT 150mm A106
- material: A106 (P265GH K18 ST.45.8 1.0405)
- certificate 3.1
Cap 3/8'' NPT A105 3000lbs
- material: carbon steel
- certificate 3.1 at the request of the customer (free of charge
- origin: European Union
Ball Valve 3/8" PN16 ZK-Ga
Hex plug 3/8" NPT A105 cl.3000
Steel Pipe 3/8" 17.2 × 2.3 mm P235GH 100 cm
Tee 3/8'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Nipple union 3/8'' NPT A105 cl.3000
- śrubunek stalowy
- atest 3.1
- pochodzenie: Unia Europejska
Tee 3/8'' socket weld A105 cl.3000
- tee for welding
- size: 3/2''
- certificate 3.1
Elbow 3/8" socket weld A105 cl.3000 90 degrees
Elbow 3/8" NPT A105 45° Class 3000 206 Bar
Steel Tube 14 × 2.5 mm E235+N – 100 cm
Short bend 3/4'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Short bend 1'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Łuk krótki 1 1/4'' żeliwo ocynk 90 stopni GW
- inna nazwa: nr 2a
- numer PN / ISO: D1
Coupling 2'' BSP 206bar 304L
- high pressure coupling
- certificate 3.1
- orgin: European Union
Short bend 1 1/2'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Coupling 2 1/2'' steel for welding
Short bend 2'' cast iron 90deg
- inna nazwa: nr 2a
- numer PN / ISO: D1
Coupling 2" socket weld A105 cl.3000
Coupling 2 1/2" BSPT Class 3000 ASTM A105
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate

