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Imperial Hex Head Bolt & Nut Sets (Clearance Flanges)

Imperial Hex Head Bolt & Nut Sets (Clearance Flanges)

TFM’s Imperial Hex Head Bolt & Nut Sets (Clearance Flanges) are designed to provide secure and durable fastening solutions for high-performance vacuum, cleanroom, and industrial applications. These precision-engineered sets feature robust hex head bolts paired with matching nuts, ensuring leak-tight connections and reliable performance in demanding systems. Crafted from corrosion-resistant materials, these sets are ideal for use in clearance flange assemblies, offering long-lasting performance under high pressure and vacuum conditions.

Key Features

  • Hex Head Bolt Design
    The hex head bolts offer ease of installation and removal, even in tight spaces. Their six-sided shape provides an excellent grip, making them suitable for use with standard tools, ensuring quick and secure fastening in both industrial and cleanroom environments.

  • Corrosion-Resistant Stainless Steel
    Made from high-quality stainless steel, these bolt and nut sets offer excellent resistance to corrosion, oxidation, and wear, ensuring that they maintain their integrity even in harsh environments. This makes them ideal for high-demand systems, including vacuum and semiconductor setups.

  • Matching Nuts for Secure Fitment
    The matching nuts in these sets are designed to work seamlessly with the hex head bolts, ensuring that both the bolt and nut remain secure throughout their use. The precise fitment reduces the risk of loosening or slippage, which can cause potential failures in critical systems.

  • Imperial Thread Sizes
    Available in a range of imperial thread sizes such as ¼-20, 10-32, and 5/16-24, these bolt and nut sets are compatible with various clearance flange assemblies, making them versatile for a wide range of applications.

  • Leak-Tight Connections
    The high-quality construction and secure fitment of these bolts and nuts ensure leak-tight connections, which are crucial in vacuum and pressure-sensitive environments.

Applications

  • Vacuum Systems
    These bolt and nut sets are perfect for use in vacuum systems where secure, leak-tight connections are critical. Whether for use in UHV chambers or vacuum flanges, they offer exceptional reliability and performance.

  • Semiconductor Manufacturing
    Ideal for semiconductor manufacturing environments such as PVD, CVD, and etching systems, the Imperial Hex Head Bolt & Nut Sets offer superior mechanical strength and corrosion resistance, making them perfect for high-precision applications.

  • Cleanroom and Research Environments
    Designed for cleanroom use, these sets are packaged in a manner that prevents contamination, making them ideal for use in laboratory and research settings where cleanliness and reliability are essential.

  • Aerospace and Industrial Systems
    These bolt and nut sets are also suitable for aerospace and industrial systems that require strong and secure connections, where corrosion resistance and durability are essential for maintaining system integrity.

Specifications

  • Thread Sizes: UNC (¼-20, 10-32, 5/16-24)

  • Material: Stainless steel

  • Head Style: Hex head for easy tool use

  • Nut Style: Matching nuts for secure fastening

  • Packaging: Cleanroom-compatible packaging

  • Plating: Unplated stainless steel (optional plating available)

Why Choose TFM?

TFM’s Imperial Hex Head Bolt & Nut Sets (Clearance Flanges) provide the perfect combination of durability, corrosion resistance, and ease of use. With secure, leak-tight connections, these sets are ideal for high-performance applications such as vacuum systems, semiconductor fabrication, cleanroom setups, and industrial environments. Designed to meet the highest standards, TFM ensures that every component delivers exceptional performance.

Ordering Table

Flange OD Thread TPI Length Note Part Number
DN16CF (1.33" OD) 32 0.75 2 SBS832075S4-25
DN25CF (2.125" OD), DN35CF-DN40CF (2.75" OD) 28 1.38 HBS25028138
DN25CF (2.125" OD), DN35CF-DN40CF (2.75" OD) 28 2 1 HBS25028200
DN35CF-DN40CF (2.75" OD) 28 2.25 1 HBS25028225
DN50CF (3.375" OD) 24 1.75 HBS31224175
DN63CF (4.50" OD), DN75CF (4.625" OD) 24 2 HBS31224200
DN100CF (6.00" OD) 24 3 1 HBT31224300
DN100CF (6.00" OD), DN125CF (6.75" OD), DN160CF (8.00" OD) 24 2.25 HBS31224225
DN200CF (10.00" OD) 24 2.5 HBS31224250
DN200CF (10.00" OD) 24 3.5 1 HBT31224350
DN250CF (12.00" OD) 24 2.5 HBT31224250
DN275CF (13.25" OD) 24 4 HBT37524400
DN350CF (16.50" OD) 24 3 HBT37524300

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 
  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 
  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 
  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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