Malleable Iron 310 Backnut NPT Thread

Size: 1/2”-4”
Material: ANSI/ASTM A197-A,KTH350-10
Dimension: ANSI/ASTM B16.3/14/39
Thread: ANSI/ASTM B1.20.1,NPT
Pressure Rating: 363PSI,CLASS150
Surface Treatment:Hot-dip Galvanized,Electro Galvanized,Black
Zinc Coating: ASTM A 153
Certificate: UL Listed / FM Approved / NSF 61
Application: Fire Protection,Waterworks,HVAC,Plumbing,GAS,Irrigation,or other piping systems

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Product Description

Products Details

Malleable Iron 310 Backnut. Backnut is a kind of connection of pipe fittings commonly used in plumbing installation,Fire Protection,Waterworks,HVAC,Plumbing,GAS,Irrigation,or other piping systems. The manufacturing process of malleable iron backnut is relatively simple and the cost is low, so it has been widely used in construction, machinery, chemical industry and other fields. In the field of construction, Malleable iron backnuts can be used to fix steel bars, connecting components, etc.; in the mechanical field, it can be used to fix machine parts, pipes, etc.; in the chemical industry, it can be used to seal pipes, connect equipment, etc.

In general, malleable iron backnut is a metal product with wide application value and can meet the needs of different fields.

Product Drawing

Size A(mm) S(mm) PCS/CTN.
1/2″ 9 29 700
3/4″ 10 36 500
1″ 11 45 400
1-1/4″ 11 56 300
1-1/2″ 12 63 240
2″ 13 77 160
2-1/2″ 15 93 60
3″ 18 109 50
4″ 21 137 40

Annealing process:

The annealing process is the most important part of the casting process. Different parameters such as heating temperature, heating speed, holding time and cooling speed can achieve different processing effects. Regarding the performance of malleable iron pipt fittings, there is a very standard heating temperature, heating speed and other parameters. Annealing is one of the factors that tests whether a factory is professional. Once a parameter fails to meet the standard, the product produced will be unqualified.

Our advantage in annealing

Fluid tech Group has more than 40 years of casting experience and technical reserves, and has the strongest technical capabilities in the industry in handling the annealing process. At the same time, we use an internationally advanced tunnel annealing furnace to effectively ensure the product performance of castings.
We often find the phenomenon of internal thread chipping in the products of other domestic manufacturers. In fact, this is a manifestation of unqualified annealing technology, resulting in uneven material, high brittleness, and poor processing performance of the castings. In the later machining process, the wire threading process A collapse occurred.