Menu
- Nipples / Adapters external threads(244)
- Couplings / half coupling - internal threads(198)
- Reduction(179)
- Compression Fittings(11)
- Elbows(181)
- Cross(20)
- Tees(132)
- Plugs(106)
- Caps(58)
- Pipe nipple(117)
- Hose-end fittings(77)
- Unions(138)
- Sockolet / Weldolet / Threadolet / Boss / Elbolet / Couplet(111)
- Measuring connection(3)
- Pipes(21)
- Flanges(89)
- Valves(76)
- Gaskets / Sealant tapes(293)
- Slide bushing(114)
- Socket Weld Fittings(131)
- Air Springs(33)
- Pendant control station(222)
- Limit switches(23)
- Electronics(17)
- Thermostat(2)
- Potentiometer(6)
- BRAHMA(5)
- Rectifiers(10)
- Building supplies(2)
- FACOM(2)
- Screws(19)
- Packaging(3)
- Other products(1)
- Heads(4)
- Liquefactions(3)
- Books in Ukrainian(2)
New products
Products on sale
Login
Product of the Day
€81.51
€66.27
€3.61
€2.94
€0.27
€0.22
Screw-in fitting 1/2'' NPT for pipe 12mm
Regular price:
Regular price:
product unavailable
add to wish list
Description
Screw-in fitting 1/2'' NPT for pipe 12mm
- size: fits to pipe (hose) ϕ12
- cone 24 degrees
- material: stainless steel
- connector 1: male thread 1/2'' NPT (sealed on the thread)
- connector 2: for pipe (hose) ϕ 12 mm
- in the set: nipple + 1 nut + 1 barrel
- sealing type: with cutting ring
- execution acc. to the standard DIN 2353 ISO 8434-1
- pressure: 315 bar
- application: industrial systems, gas systems

Other name: Screw-in fitting 1/2'' NPT for pipe 12mm compression with barrel thread connector with a nut and cutting ring for hose or pipe of metric diameter
Information
Steel grade 316Ti - is a stainless steel with the addition of titanium and also with a low carbon content. It can be used in highly corrosive areas. It is very similar to 316 steel in terms of chemical composition and mechanical properties. The addition of titanium is intended to reduce intergranular corrosion when heated in the temperature range of 425-815°C.
Steel 1.4571 has an average carbon content of 0.06%, chromium 17%, nickel 12%, molybdenum 2%, titanium - less than 1%.
Other name: AISI316Ti 1.4571. SS316Ti X6CrNiMoTi 17-12-2
Applications of steel 1.4571: food industry, brewing industry, means of transport, ship tanks, for storage of liquefied petroleum gas (LPG), potrochemical industry, petroleum industry, pulp and paper industry, mining industry.
Among the advantages of this grade is certainly that it is a non-magnetic steel with excellent ductility, impact strength, excellent weldability, good toughness, and has a wide operating temperature range.
Since the tapered thread (NPT) is formed by a helical cut on the outer or inner tapered surface, a tight connection is ensured without the need for additional sealing.
Undoubtedly, the advantage of compression fittings among which is the Screw-in fitting 1/2'' NPT for pipe 12mm, is that you can reuse them, with proper installation. On the other hand, if you remove them, make sure you reduce the pressure in the system.
How to install a compression fitting on a tube?
- Clean the tube from dirt and any burrs
- Slide the nut and the ring (barrel) onto the end of the tube
- Slide the tube into the socket of the fitting and turn the nut by hand
- Then tighten the nut with a wrench for 1 or 1 1/4 turns ( depending on the size). To do this, it is convenient to mark yourself a dot on the nut with a marker so that you can be sure that you are tightening the nut correctly. You can use a flat wrench or a frog to do this.
Our offer includes also other sizes. If you have any questions contact us. Call 63/2614202 or send an inquiry to e-mail: biuro@polberis.pl
More information about fittings and nipples you may find here>>
Write to us if you have European VAT number and do not want to pay the TAX. We will prepare an offer without VAT. Contact us if you want to know price of shipping. Send an inquiry to e-mail: biuro@polberis.pl
Related products
Stainless pipe nipple 1/2'' 316L NPT 100mm
Steel reduction nipple 1/2'' - M20x1,5 connector
- nypel stalowy wkrętny
Cast iron plug 1/2''
- korek z kwadratem na klucz
- model: T9 / nr 46 / nr 290
Nipple 1/2''x1/4'' galvanized cast iron
- nypel żeliwny ocynkowany
Reduction 1/2'' BSP NPT FT MT
- redukcja stalowa
Nipple 1/2''x3/8'' galvanized cast iron
- nypel żeliwny ocynkowany
Steel reduction nipple 1/2'' - M22x1,5 connector
- nypel stalowy wkrętny
Steel reduction nipple 1/2'' - M24x1,5
- nypel stalowy wkrętny
Steel reduction 7/16'' - 1/2'' UNF JIC
- złączka wysokociśnieniowa
- stal galwanizowana
Hose-end fitting 1/2" x 10mm brass nipple
Hose-end fitting 1/2" x 20mm brass nipple
Hose-end fitting 1/2" x 13mm brass nipple
Stainless nipple 1/2'' BSPT 304
- nypel z atestem 3.1
- ciśnienie: 206bar
Screw-in fitting 1/2'' NPT for pipe 6mm
Screw-in fitting 1/2'' NPT for pipe 8mm
Steel reduction 5/8'' - 1/2'' screw-on
Steel hose-end fitting 1/2'' x 8mm
- high pressure steel hose-end fitting
Screw-in fitting 1/2'' NPT for pipe 15mm
- material: stainless steel
Reduction 1/2''x1/8'' 316 nut-screw
- stal nierdzewna
Reduction 1/2''x1/4'' 316 nut-screw
- stal nierdzewna
Reduction 1/2''x3/8'' 316 nut-screw
- stal nierdzewna
Gasket ED WD 1/2'' for steel fittings
Angle union 1/2'' galvanized cast iron F-M
- żeliwo ocynkowane
Hose-end fitting 1/2'' x 6mm brass
Hose-end fitting 1/2'' x 9mm brass
Hose-end fitting 1/2'' x 11mm brass
Hose-end fitting 1/2'' x 13mm brass
Steel nipple 1/2'' BSP - 9/16'' UNF JIC fitting
Straight connector 1/2'' UNF - 7/16'' UNF male threads
Ball valve 1/2'' brass male-female
Steel reduction 1/2'' BSP - 7/8'' UNF 14
Hose-end fitting 1/2'' x 9mm stainless steel
- stal szlachetna 316
Hose-end fitting 1/2'' x 13mm stainless steel
- stal szlachetna 316
Hose-end fitting 1/2'' x 15mm stainless steel
- stainless steel 316
Hose-end fitting 1/2'' x 20mm stainless steel
- stainless steel 316
Washer metal rubber 1/2'' FPM FKM
Screw-in fitting 1/4'' NPT for pipe 15mm
Stainless union 1 '' BSP
- material: stainless steel 316
Stainless union 2'' BSP
- material: stainless steel 316
Ball valve 3/4'' NPT PN100 A105 316
- stainless steel
- certificate 3.1
- origin: European Union
Ball valve 1'' NPT PN100 A105 316
- atest 3.1
Stainless nipple 1'' BSP - BSPT 316
Stainless nipple 3/4'' 316
- nipple 3/4'' stainless
Stainless nipple 1/4'' 316
- nipple 1/4'' stainless
Stainless union 1/2'' BSP
- material: stainless steel 316
Stainless nipple 1'' 316
- nipple 1'' stainless
Stainless nipple 2'' 316
Screw-in fitting 1/2'' NPT for pipe 10mm
- material: stainless steel
Coupling 1/2'' NPT 1.4571 316Ti
Hex plug 1 1/2" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1/2'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 3/8'' NPT 316Ti
Hex plug 1" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Reduction coupling 1'' x 1 1/2'' NPT 3000 A105
Coupling 3/8'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 3/4'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1/4'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1/8'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Hex plug 3/8" NPT A105 cl.3000
Hex plug 3/4" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Hex plug 1/4" NPT A105 cl.3000
Hex plug 1/8" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Hex plug 2" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Hex plug 1/2" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Cap 1/2'' NPT 304L cl.3000
- hexagonal stainless steel cap
- atest 3.1
Coupling 1/2'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Coupling 1/8'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1/4'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Tee 1/2'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Nipple 1/2'' NPT cl. 3000 A105 fitting
Coupling 2'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Steel nipple 1/8'' NPT- 1/4'' BSP
Steel nipple 1/4'' BSP - NPT
- external thread
- high-pressure nipple
Elbow 1/4'' NPT - 9/16'' JIC steel nipple
Steel reduction nipple 1/4'' NPT - 3/8'' BSP
- nypel stalowy
Plug 1/4'' NPT stainless 316L
Coupling 3/8'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 3/4'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1/4'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Coupling 1/8'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Hex plug 1 1/4" NPT A105 cl.3000
- korek wysokociśnieniowy
- rozmiar: 5/4''
- atest 3.1
41,4÷42
Reduction coupling 1'' x 3/4'' NPT 3000 A105
Coupling 1/2" x 1'' NPT cl.3000 A105
Reduction coupling 2'' x 3'' NPT 3000 A105
Coupling 3/4'' NPT 316L 413bar
Reducing tee 2''x1/2''x2'' NPT A105 cl.3000
- certificate 3.1
- orgin: European Union
Half coupling 3/4" NPT cl. 3000 A105
Half coupling 1/2" NPT cl. 3000 A105
Half coupling 1" NPT cl. 3000 A105
Plug 1/2'' NPT stainless 316L
Plug 1'' NPT stainless 316L
Plug 3/4'' NPT stainless 316L
Union 2'' NPT P245GH 206bar
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1 1/2'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Nipple 1'' NPT cl. 3000 A105 fitting
Nipple 1 1/2'' NPT cl. 3000 A105 fitting
- size: 3/2'' ( DN40 )
Nipple 2'' NPT cl. 3000 A105 fitting
Nipple 3/8'' NPT cl. 3000 A105 fitting
Coupling 1 1/2'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Coupling 1'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Reduction 1''x3/4'' NPT hexagonal nut-screw WZ
- stal A105 (P245GH P265GH P285GH)
- redukcja wysokociśnieniowa
- atest 3.1
Steel elbow 1/4'' NPT - BSP
- High-pressure elbow fitting
Coupling 1 1/4'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Nipple union 3/4'' NPT A105 cl.3000
- śrubunek stalowy
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 3'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Plug 1 1/4'' NPT stainless 304L
Coupling 3/4'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Steel nipple 9/16'' JIC - 1/4'' NPT
- nypel stalowy
Reduction nipple 1''x1 1/2'' NPT 206bar A105
- nypel wysokociśnieniowy 1''x5/2''
Reduction nipple 3/4''x1 1/2'' NPT 206bar A105
- nypel wysokociśnieniowy 3/4''x5/2''
Reduction nipple 1/2''x1'' NPT 206bar A105
- nypel wysokociśnieniowy 1/2x1
- atest 3.1
Reduction nipple 3/4''x1'' NPT 206bar A105
Reduction nipple 1/2''x 3/4'' NPT 206bar A105
- nypel wysokociśnieniowy
- atest 3.1
Tee 3/4'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Plug 2'' NPT stainless 316L
Coupling 3'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 3/4'' NPT A105 cl.6000
- mufa stalowa wysokociśnieniowa
- stal do spawania
- atest 3.1
Plug 1'' NPT stainless 304L
Reduction nipple 1''x1 1/4'' NPT 206bar A105
Union 1'' NPT 316L cl.3000
- uszczelnienie: stożkowe (metal-metal)
- gatunek: 316L (1.4404)
- towar z atestem 3.1
Plug 1/4'' NPT stainless 304L
Reduction 1/2''x3/4'' NPT hexagonal nut-screw WZ
Redukcja NPT klasa 3000 A105
- stal A105 (P245GH P265GH P285GH)
Reducer bush 1/2''x3/4'' NPT 304L Hex
- stainless steel 316L (1.4404 A182)
- orgin: European Union
Coupling 2'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Steel hose-end fitting 5/16'' thread 1/4'' NPT
Hex plug 3" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Tee 2'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Coupling 3/8'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Reduction nipple 1''x2'' NPT 206bar A105
- nypel wysokociśnieniowy 1x2
- atest 3.1
Coupling 1/2'' x 1 1/2'' NPT cl.3000 A105
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1/2'' NPT A105 cl.6000
- mufa stalowa wysokociśnieniowa
- stal do spawania
- atest 3.1
Half coupling 1/4" NPT cl. 3000 A105
THREADOLET 1'' NPT A105 cl. 6000
THREDOLET 1/2'' NPT A105 cl. 6000
THREDOLET 1/4'' NPT A105 cl. 6000
ELBOLET 1/2'' NPT A105 45 degrees cl. 3000
Boss 1'' NPT A105 cl. 3000 B16.11
Boss 1/2'' NPT A105 cl. 3000 B16.11
- steel for welding
Boss 1/4'' NPT A105 cl. 3000 B16.11
Couplet 1 1/2" threaded NPT A105 cl. 3/6000
COUPLET 1/2'' threaded NPT A105 cl. 3000
COUPLET 1/4'' threaded NPT A105 cl. 3000
Reduction 1'' - 1 1/2'' NPT 304 cl.3000 MT FT adapter
Reduction 1 1/2''x 1/2'' NPT A150 hexagonal nut-screw
- stal A105 (P245GH P265GH P285GH)
- redukcja wysokociśnieniowa
- atest 3.1
Reduction 1''x1 1/2'' NPT hexagonal nut-screw
- redukcja wysokociśnieniowa
- atest 3.1
Coupling 1/2" S355J2 cl.3000 NPT
Coupling 1/4'' NPT A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/2'' NPT A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 3/4'' NPT A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Pipe nipple 1/4'' NPT 100mm A333
Pipe nipple 1'' NPT 100mm A333
COUPLET 1'' threaded NPT A105 cl. 3000
Reducing Coupling 2'' NPT Stainless Steel
- mufa ze stali nierdzewnej
- do wysokiego ciśnienia: 206bar
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 1/2'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Steel nipple 1'' BSP - NPT
Steel nipple 3/4'' BSP - NPT
- external threads
- high-pressure nipple
Reduction nipple 1/4'' - 1/2'' NPT 316L cl.3000
Reduction nipple 3/8'' - 1/2'' NPT 316L cl.3000
Steel nipple 1/8'' BSP - NPT
- złącze wysokociśnieniowe
- nypel redukcyjny
Steel nipple 3/8'' NPT- 1/2'' BSP
Steel nipple 1/2'' BSP - NPT
- złącze wysokociśnieniowe
Cap 1/2'' NPT 316L cl. 3000
- stainless steel
- acc. to ANSI B16.11
- certificate 3.1 at the request of the customer (free of charge)
Cap 1/4'' NPT 316L cl. 3000
- stainless steel
- acc. to ANSI B16.11
- certificate 3.1 at the request of the customer (free of charge)
Cap 3/4'' NPT 316L cl. 3000
- stainless steel
- acc. to ANSI B16.11
- certificate 3.1 at the request of the customer (free of charge)
Cap 1'' NPT 316L cl. 3000
- stainless steel
- acc. to ANSI B16.11
- certificate 3.1 at the request of the customer (free of charge)
Nipple 1/4'' NPT stainless 316L 206bar
- stainless fitting
- certificate 3.1
Nipple 1/2'' NPT stainless 316L 206bar
- stainless fitting
- certificate 3.1
Nipple 3/4'' NPT stainless 316L 206bar
- stainless fitting
- certificate 3.1
Nipple 1'' NPT stainless 316L 206bar
- stainless fitting
- certificate 3.1
Pipe nipple 1/2'' NPT 100mm A106
- material: A106 (P265GH K18 ST.45.8 1.0405)
- certificate 3.1
Union 1'' NPT MT FT 316L cl.3000
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Reduction coupling 1 1/4" x 1 1/2'' NPT 3000 A105
Elbow 1'' NPT female thread
Reduction 1''-1/2'' NPT hexagonal nut-screw WZ
Reduction 2''x 1'' NPT hexagonal nut-screw WZ
Steel reduction coupling 1/4''x1/2'' NPT
Steel nipple 1/4'' NPT
Steel nipple 1/2'' NPT
Reduction coupling 1/2'' x 3/4'' NPT cl.3000 A105
Reduction nipple 1/2''-1'' NPT
Reduction 1/2''x1/4'' NPT hexagonal nut-screw WZ
- stal A105 (P245GH P265GH P285GH)
Stainless pipe nipple 2'' 304L NPT 100mm
Pipe nipple 2'' NPT 100mm A106
Reduction 3''x2'' NPT hexagonal nut-screw
- stal A105 (P245GH P265GH P285GH)
- redukcja wysokociśnieniowa
- atest 3.1
Reduction coupling 2'' x 1'' NPT 3000 A105
Measuring connection 1/8" NPT S12,65x1,5
Reduction nipple 3/8''- 1/2'' NPT
Coupling 1/4'' x 1'' NPT 316L cl.3000
- High-Pressure coupling
- Certificate 3.1
Reducer bush 3/8''x3/4'' NPT 316L Hex
- stainless steel 316L (1.4404 A182)
- orgin: European Union
Coupling 1/2'' x 1'' NPT 316L cl.3000
- High-Pressure coupling
- Certificate 3.1
Nipple 3'' NPT cl. 3000 A105 fitting
Nipple 4'' NPT cl. 3000 A105 fitting
Ball valve 1/2'' NPT PN100 A105 316
- atest 3.1
Ball valve 1/2'' NPT 316L PN100
Half coupling 2" NPT cl. 3000 A105
Stainless nipple 3/4'' 316
- nypel z atestem 3.1
- ciśnienie: 206bar
Plug 3/8'' NPT stainless 316L
Plug 1 1/2'' NPT stainless 316L
Pipe nipple 1 1/4'' NPT 100mm A106
- rozmiar: 1.1/4'' (średnica gwintu wynosi 41,4 ÷ 42mm)
- gwint: NPT (stożkowy amerykański)
- długość: 100mm
Plug 1 1/2'' NPT stainless 304L
Plug 2'' NPT stainless 304L
Plug 4'' NPT stainless 304L
Coupling 2 1/2'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Tee 1 1/2'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Tee 1 1/4'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Tee 1'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Reduction 1 1/4''x1 1/2'' NPT hexagonal nut-screw WZ
- redukcja wysokociśnieniowa 5/4''x3/2''
- atest 3.1
Reduction 1''x1 1/4'' NPT hexagonal nut-screw WZ
- redukcja wysokociśnieniowa 1''x5/4''
- atest 3.1
Reduction 1/2''x1 1/4'' NPT hexagonal nut-screw WZ
- redukcja wysokociśnieniowa 1/2''x5/4''
- atest 3.1
Plug 1'' NPT stainless 321
- stainless steel 321 321 1.4541 SS321 AISI321
- certificate 3.1 at the request of the customer (free of charge)
Coupling 2'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Coupling 1'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Reducer bush 3/4''x1/4'' NPT 316L Hex
- stainless steel 316L (1.4404 A182)
- orgin: European Union
Reduction nipple 1 1/4''x1 1/2'' NPT 206bar A105
Square Head Plug 2" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
THREADOLET 3/4''x3''-5'' NPT A105 cl.3000
- odgałęźnik stalowy do spawania
- atest 3.1
Pipe nipple 1'' NPT 150mm gat. A333
Reduction 2''x1 1/2'' NPT hexagonal nut-screw WZ
- stal A105 (P245GH P265GH P285GH)
- redukcja wysokociśnieniowa
- atest 3.1

