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Gaskets and seals

Corrosion, pressure, and high heat resistant products for operating in the world’s harshest conditions

ACCREDITED SEALS AND GASKETS FOR SAFETY CRITICAL INDUSTRY

Standard and bespoke products

Our gaskets, seals and thin walled annular components provide exceptional performance in the most extreme conditions. We manufacture in a wide range of materials, including stainless steel, exotic high nickel alloys, and carbon steel.

Every component we make and supply is approved and accredited for the relevant industry applications, boosting efficiency while safeguarding health, safety and environment.

Ring Type Joints (RTJ)

Conforming to both ASME B16.20 and API 6A international standards, LoneStar Fasteners manufactures and supplies styles R, RX and BX Ring Type Joints. Each seal is low stress stamped to provide full traceability, from the original mill source through to the place, month and year of manufacture. LoneStar Fasteners holds two American Petroleum Institute API 6A PSL-4 licences globally. We maintain an enviable inventory of RTJs in strategic locations across the globe, including all sizes and styles in a wide variety of materials, while our in-house machining capabilities allows us to manufacture specialised, non standard ring joints.

Spiral Wound Gaskets (SWG)

Spiral Wound Gaskets (SWG) are semi metallic gaskets, suitable for high temperature and high pressure environments across a wide range of industrial sectors. LoneStar Fasteners SWGs are manufactured in a wide variety of shapes, sizes and material combinations, to international standards and to meet customer specific requirements.

Kammprofile Gaskets

With or without outer rings, LoneStar Fasteners kammprofile gaskets are typically used in heat exchangers, and across the full range flanged joints in pipelines.

Precision Engineered Metallic Seals

LoneStar Fasteners is an OEM approved manufacturer of mission critical precision engineered metallic seals, accurately and repeatedly producing complex components in a broad range of materials. Our in-house coating and plating capabilities ensure that LoneStar Fasteners always retains complete control of the manufacturing process, while comprehensive inspection and documentation packages ensure customers receive components of the highest quality, exactly to their requirements.

Soft Cut Gaskets

LoneStar Fasteners supplies a wide range of cut gaskets, from standard flange sizes to large irregular shaped gaskets, in many brand leading materials, from virgin PTFE to compressed non asbestos (CNAF) sheeting and graphite. Our skilled cutters and state of the art machinery offer a fast, accurate manufacturing service.

Flange Insulation Kits

LoneStar Fasteners engineered insulation products can be used to control and confine electrolytic corrosion in almost any piping system. Our insulating materials are manufactured to withstand hydrocarbon exposure, weathering and salt water, while our quality assurance and high production rate mean little or no down time due to electrolysis. All insulation products are supplied in kit form, complete with the necessary quantities of isolating sleeves, isolation washers and back up washers.

Double Jacketed Gaskets

As most jacketed gaskets are application specific, precision and attention to detail is crucial. With extensive manufacturing expertise and capabilities, LoneStar Fasteners can ensure the jacketed gaskets we manufacture meet both customer specifications and national and international industry standards.

Non Asbestos Sheet Material

LoneStar Fasteners stocks an extensive inventory of non asbestos sheet material that can be used to manufacture gaskets, or supplied by the sheet. Our non asbestos sheet is a compressed material produced from a combination of aramid and other synthetic fibres and bonded with several binders, the most common being nitrile rubber gasket material (NBR).

Products and Services

Excellence as standard

We manufacture and supply the precision engineered products crucial for today’s industries and tomorrow’s world. Our fasteners, seals, gaskets and packages set global standards in quality and reliability, while our global team of over 1,200 experts deliver exceptional service throughout the world.


Fasteners and bolting

Engineered to exacting standards, for the full spectrum of critical industry.

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Gaskets and seals

Corrosion, pressure, and high heat resistant gaskets, seals, and thin walled annular components operating in the world’s harshest conditions.

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Precision engineered components and assembly

Standard and bespoke products in a wide range of materials, approved and accredited for critical industry applications.

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CNC machining, hot forging and thread rolling

Custom threading, hot forging and machining for all grades and finishes.

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Specialized coating and plating

Providing coating and plating expertise, we strengthen your precision engineered products.

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On site supply chain service

Global manufacturing and robust stockpiles for an unmatched supply chain service.

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24/7 Hotshot

Combining localised technical support with global reach, our hotshot service operates 24/7, all around the world.

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Independent test laboratories

Class leading independent ISO 17025 accredited test laboratories in Europe, the USA and the Middle East.

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Specialist technical support

Our global team of longstanding engineering experts, technical specialists, and future technologists are on hand to deploy unmatched industry understanding to every project.

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Connect with LoneStar Fasteners

LoneStar Fasteners is a leading global manufacturer and supplier of high performance, precision engineered components. We operate seamlessly across sectors, collaborating with our customers to form a trusted extension of their expert teams.

Get in touch to begin the conversation. Contact us.