China wholesaler Chinese Manufacturer Stainless Steel Pipe Fittings Female to Female Hex Couplings with Good quality

Product Description

Hikelok Pipe Fittings- Hex Couplings

Instrumentation Pipe Fittings

Available in sizes from 1/16 to 2 in. and 6mm to 30mm.

Hikelok pipe fittings materials include stainless steel, alloy400/R-405, brass and duplex steel.

Hikelok provides NPT, ISO/BSP, SAE and ISO threads configurations.

Burr-free smooth thread provide optimum sealing and minimize galling.

Materials Standards

Material Bar stock Forgings
316 stainless steel


ASME SA479, EN 1.4401


ASME SA182, EN 1.4401

Alloy 20 ASTM B473 ASTM B462
Alloy 400/R-405

ASTM B164,


ASTM B564,


Alloy 600 ASTM B166,ASME SB166 ASTM B564,ASME SB564
Alloy 625 ASTM B446 ASTM B564,ASME SB564
Alloy 825 ASTM B425 ASTM B564,ASME SB564
Alloy C-276 ASTM B574 ASTM B564
Aluminum ASTM B211 ASTM B247
Carbon steel B453 ASTM A108

Thread Specifications


Thread Type(End Connection) Reference Specification
NPT ASME B1.20.1,SAE AS71051


(Based on DIN 3852)

(Hikelok PPT,BP,and BS fittings)

ISO 228,JIS B5712


(Based on DIN 3852)

(Hikelok BT fittings)

ISO 7,BS EN 15716-1,

JIS B5713


(Based on EN 837-1 and 837-3)

(Hikelok BG)

ISO 228

Unified (SAE)

(Hikelok SA fittings)


Working Temperature Rating


Working Temperature Rating


316 stainless steel -65(-53) to 1000(537)
Brass -20(-28) to 400(204)
Carbon steel -65(-53) to 375(190)
BS gaskets(FKM) -5(-15) to 400(204)
BG BP gaskets(copper) -5(-15) to 400(204)
SAE O-ring (FKM) -5(-15) to 400(204)

NPT Thread Pressure Ratings

Ratings are based on ASME Code for Pressure Piping B31.3,

Process Piping, at ambient temperature.

316 S.S. and Carbon Steel Brass
Male Female Male Female
psig bar psig bar psig bar psig bar
1/16 11000 760 6700 460 5500 380 3300 230
1/8 10000 690 6500 440 5000 340 3200 220
1/4 8000 550 6600 450 4000 270 3300 220
3/8 7800 540 5300 360 3900 270 2600 180
1/2 7700 530 4900 330 3800 260 2400 160
3/4 7300 500 4600 320 3600 250 2300 160
1 5300 370 4400 300 2600 180 2200 150
1 1/4 6000 410 5000 350 3000 200 2500 170
1 1/2 5000 340 4600 310 2500 170 2300 150
2 3900 270 3900 270 1900 130 1900 130




Company Introduction


Our Services



Standard: ANSI, GB, JIS
Material: Stainless Steel
Connection: Female
Head Type: Hexagon
Product Name: Hex Couplings
Body Material: Stainless Steel
US$ 2/Piece
1 Piece(Min.Order)

Request Sample



Customized Request


Programming With Couplings

A coupling is a mechanical device that connects two shafts together and transmits power. Its purpose is to join rotating equipment and allows some degree of end-movement or misalignment. There are many different types of couplings. It’s important to choose the right one for your application.

Mechanical connection between two shafts

There are many ways to achieve mechanical connection between two shafts, including the use of a coupling. One common type is the beam coupling, which is also known as a helical coupling. It is used for transmission of torque between two shafts. This type of connection accommodates axial, parallel and angular misalignments.
The hubs and shafts of a worm gear are connected together by a coupling. This mechanical connection allows one shaft to turn another without causing a mechanical failure. This type of coupling is made from sliding or rubbing parts to transfer torque. However, the coupling is not designed to withstand jerks, so it isn’t suitable for high-speed applications.
The use of a coupling is common in machinery and equipment. It helps transmit power from one drive shaft to the other, while adding mechanical flexibility. It is also useful for reducing the impact and vibration caused by misalignment. It also protects the drive shaft components from wear and tear.
A double-hook coupling can be used to provide a uniform angular velocity at the driven shaft. Another example is a double-jointed coupling. A double-jointed coupling can be used to connect shafts that are not directly intersecting. The double-jointed yoke can be used for the same purpose.
A shaft coupling is a device that maintains a strong mechanical connection between two shafts. It transfers motion from one shaft to another, at all loads and misalignments. Unlike a conventional linkage, a shaft coupling isn’t designed to allow relative motion between the two shafts. Couplings often serve several purposes in a machine, but their primary use is torque and power transmission.

Functions that control the flow of another function

One of the simplest programming constructs is a function that controls the flow of another function. A function can take an argument and return a different value, but it must be ready to return before it can pass that value to another function. To do this, you can use the goto statement and the if statement. Another way to control flow is to use a conditional statement.

Criteria for selecting a coupling

There are several important factors to consider when choosing the right coupling. One of the most important factors is coupling stiffness, which depends on the material used and the shape. The stiffness of a coupling determines its ability to resist elastic deformation. A stiff coupling is desirable for certain types of applications, but it’s undesirable for others. Stiffness can reduce the performance of a system if there’s too much inertia. To avoid this, ensure that the coupling you choose is within the recommended limits.
The size of a coupling is also important. Different coupling types can accommodate different shaft sizes and shapes. Some couplings have special features, such as braking and shear pin protection. When choosing a coupling, you should also consider the type of driven equipment. If you need to connect a high-torque motor, for example, you’ll want to choose a gear coupling. Likewise, a high-speed machine may require a disc coupling.
Another factor to consider when selecting a coupling is the torque rating. Despite its importance, it’s often underestimated. The torque rating is defined as the torque of the coupling divided by its OD. In some cases, torque may fluctuate during a cycle, requiring a coupling with a higher torque rating.
Torsionally flexible couplings are also important to consider. Their design should be able to withstand the torque required during operation, as well as the required speed. The coupling should also have a high degree of torsional stiffness, as well as damping. Furthermore, a damping coupling can reduce the energy wasted through vibration.
The sizing of a coupling is also determined by the torque. Many engineers use torque to select the correct coupling size, but they also take into consideration torsional flexibility and torsional stiffness. For example, a shaft may be able to handle large torque without damaging the coupling, while a disk may be unable to handle large amounts of torque.
Besides torque, another important consideration in coupling selection is the cost. While a coupling may be cheaper, it may be less reliable or easier to maintain. Couplings that are difficult to service may not last as long. They may also require frequent maintenance. If that’s the case, consider purchasing a coupling with a low service factor.
There are many different types of couplings. Some require additional lubrication throughout their lifetime, while others are 100% lubrication-free. An example of a 100% lubrication-free coupling is the RBI flexible coupling from CZPT. This type of coupling can significantly reduce your total cost of ownership.
In addition to the above-mentioned benefits, elastomeric couplings are low-cost and need little maintenance. While they are often cheaper than metallic couplings, they also have excellent shock absorption and vibration dampening properties. However, they are susceptible to high temperatures. Also, they are difficult to balance as an assembly, and have limited overload torque capacity.
China wholesaler Chinese Manufacturer Stainless Steel Pipe Fittings Female to Female Hex Couplings   with Good quality China wholesaler Chinese Manufacturer Stainless Steel Pipe Fittings Female to Female Hex Couplings   with Good quality
editor by CX 2023-05-17

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