Wellhead Lock down Screws, Lock down Nuts, and Washers

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 Wellhead lockdown screws are external threaded (ET) screws used to secure wellhead equipment and prevent rotation or movement of items under pressure, such as tubing hangers or packoffs, during drilling or production. They use a robust thread design to prevent galling and are fully engaged or disengaged. Key features and functions:

• External thread (ET) design: The threads are located outside the pressurized or wetted surface of the wellhead equipment.
• Robust thread: Utilizes a Unified National Coarse (UNC) thread to minimize galling.
• Compression packing: Features a one-piece compression packing element with molded metal end caps for reliable sealing in various pressure and temperature conditions.
• Mechanical retention: Mechanically holds items installed in the wellhead, preventing them from rotating or moving during drilling or production.
• Pressure containment: Can be used to energize compression seals or to contain pressure within the wellhead assembly. 

Important Considerations:

• Full engagement/disengagement: Lockdown screws must be fully engaged or fully disengaged and cannot be rotated under pressure.

Lockdown screws, (LDS) utilize an external thread (ET) design that moves the threads outside the pressurized or wetted surface of the wellhead equipment. They utilize a robust Unified National Coarse (UNC) thread for the lockdown screw itself and the packing gland nut to minimize any galling. Additionally a one piece HBNR compression packing element with molded metal end caps to provide a dependable seal in multiple pressure ranges and service environments.

They mechanically retain items installed in the bowl of a head that are under pressure.
They can be utilized to energize a compression seal or seals installed in the bowl of a head.
They can be used to prevent an item installed in the head from rotating during the drilling phase of a well.
They retain pressure in the flange of a wellhead assembly.
The lockdown screw itself and the packing gland nut aredesigned with a robust bolt type thread to prevent galling.
They utilize HBNR compression packing with molded metal end caps to provide a dependable seal in multiple pressure ranges and service environments

Lockdown Screw Positions:
Lock Down Screws have the following procedural requirements:

Areeither fully engaged or fully disengaged.

The lockdown screw gland nut cannot be rotated under pressure.

Must only be operated by fully trained and authorized  Service Technicians.

• LARS-SON SUPPLY provides quality manufactured Wellhead Lockdown screws assemblies from Top Quality Manufacture in Taiwan. 
• Bulk orders with Large Quantities equals Very Competitive Prices! 
• Quality made products from a reputable manufacture   
• Min order- 250 Lockdown Screw & Nuts
• Min order- 500 Washers