Structural Heavy Hex Bolts ASTM A490

Basic Info

Model NO.: ASTM A490 Structural Bolts

Material: Carbon Steel

Standard: ASTM

Export Markets: USA, Canada, Brazil, U. K., France, Germany, Spain, Italy, Switzerland, Dubai, Singapore, Malaysia, Japan, Korea. Etc.



Additional Info

Trademark: M

Packing: 25kgs per box, 36 boxes per pallet

Origin: Ningbo, China



Product Description

1). Size: Dia.: 1/2"-1 1/2".

2). Material: Alloy steel, stainless steel, brass, etc.

3). Surface: Plain&Oiled, Black, ZP, ZY, H. D. G., Teflons Coated etc.

4). Packaging: 25kgs per box, 36 boxes per pallet.

Our company would like to cooperate with domestic and overseas clients to improve the quality of our products and our services. We can produce many kinds of fasteners, 
such as :
carriage bolt, 
stud bolt, 
hex bolt, 
flange bolt, 
hex nut and flange nut,
Flat washer and spring washer, as well as non-standard products as per drawing. 
 

Ningbo Port is the world famous port, and our company is located in the port area, obvious geographical advantages, lower transportation costs. We can provide competitive price and on time delivery! So pls trust us. For more information and discount, pls feel free email me. We are waiting for service you! Basic Info

Model NO.: ASTM A490 Structural Bolts

Material: Carbon Steel

Standard: ASTM

Export Markets: USA, Canada, Brazil, U. K., France, Germany, Spain, Italy, Switzerland, Dubai, Singapore, Malaysia, Japan, Korea. Etc.



Additional Info

Trademark: M

Packing: 25kgs per box, 36 boxes per pallet

Origin: Ningbo, China



Product Description

1). Size: Dia.: 1/2"-1 1/2".

2). Material: Alloy steel, stainless steel, brass, etc.

3). Surface: Plain&Oiled, Black, ZP, ZY, H. D. G., Teflons Coated etc.

4). Packaging: 25kgs per box, 36 boxes per pallet.

Our company would like to cooperate with domestic and overseas clients to improve the quality of our products and our services. We can produce many kinds of fasteners, 
such as :
carriage bolt, 
stud bolt, 
hex bolt, 
flange bolt, 
hex nut and flange nut,
Flat washer and spring washer, as well as non-standard products as per drawing. 
 

Ningbo Port is the world famous port, and our company is located in the port area, obvious geographical advantages, lower transportation costs. We can provide competitive price and on time delivery! So pls trust us. For more information and discount, pls feel free email me. We are waiting for service you!

By-pass assembly has two positions; by-pass and close. It is in by-pass position during trip operation, and circulates mud fluid in the drill string into the annular space by-passing the idle motor, so that no mud may spray out onto the platform during the trip operation. When mud flow rate and pressure reach the setting value, the valve stem moves down and closes the valve. Meanwhile, mud stream flows through the motor, and converts the pressure energy into mechanical energy. As mud flow rate is too low, or mud pump stops, and as the pressure produced is not enough to overcome the spring force and the static friction force, the spring presses the stem upward, and by-pass is in open position. In general, the cross-over subs are used in deep well, large angle well, horizontal well or when hollow rotor is selected.

By-Pass Assembly And Parts

By-Pass Assembly And Parts,By-Pass Valve Assembly,Automatic Bypass Valve,Pressure Bypass Valve

Weifang Shengde Petroleum Machinery Manufacturing Co., Ltd. , http://www.sdpetromachine.com