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Metric Hex Head Bolt & Nut Sets (Clearance Flanges)

Metric Hex Head Bolt & Nut Sets (Clearance Flanges)

TFM’s Metric Hex Head Bolt & Nut Sets for Clearance Flanges are purpose-built fastening solutions designed for securing vacuum and process flanges that use through-hole (clearance) mounting. These sets include high-quality metric hex head bolts, nuts, and washers, all engineered for reliability, precision fit, and long-term performance in demanding environments.

Key Features

  • Complete Set for Through-Hole Flanges
    Each kit includes a hex head bolt, a hex nut, and flat washers—everything needed to securely fasten clearance flange assemblies.

  • ISO Metric Threads
    Precision-machined to ISO metric standards, these fasteners provide tight, consistent engagement with flange hardware across international systems.

  • Stainless Steel Construction
    Manufactured from corrosion-resistant stainless steel (typically 304 or 316), these components offer excellent mechanical strength and chemical resistance in vacuum and industrial environments.

  • Hex Head Bolts for Secure Torqueing
    The hexagonal bolt heads allow for reliable torque application using standard tools, promoting uniform load distribution and maintaining flange seal integrity.

  • Cleanroom-Ready Options
    Available ultrasonically cleaned and vacuum-packaged for use in UHV and cleanroom conditions, minimizing contamination during assembly.

Metric Hex Head Bolt & Nut Sets (Clearance Flanges) Applications

  • Vacuum and UHV Systems
    Designed for assembling clearance flanges in vacuum chambers, beamlines, and process equipment used in research and semiconductor facilities.

  • Industrial Fluid and Gas Systems
    Suitable for systems requiring durable, pressure-resistant connections in corrosive or high-temperature environments.

  • Aerospace and High-Tech Manufacturing
    Ideal for applications where mechanical reliability, material purity, and precision fastening are critical.

Sizes and Options

  • Available in a wide range of metric thread sizes (e.g., M6, M8, M10, etc.)

  • Lengths tailored to fit flange thicknesses and gasket allowances

  • Custom materials and surface treatments available on request

Why Choose TFM?

TFM’s Metric Hex Head Bolt & Nut Sets (Clearance Flanges) offer a convenient, high-performance solution for securing flanged components in vacuum, industrial, and high-tech systems. With superior material quality and precision machining, TFM hardware ensures consistent performance and long-lasting reliability.

Ordering Table

Hex Head Bolt & Nut Sets (Metric Clearance)

Flange OD Length Number of Sets Material Thread Size Part Number
DN16CF (1.33" OD) 0.79 25 Stainless Steel M4 X 0.7P HBSM4X20
DN16CF (1.33" OD) 1 6 Aluminum M4 X 0.7P HBSM4X22A
DN16CF (1.33" OD) 1.4 25 Stainless Steel M4 X 0.7P HBSM4X35
DN35CF-DN40CF (2.75" OD) 1.4 25 Stainless Steel M6 X 1.0P HBSM6X35
DN35CF-DN40CF (2.75" OD) 1.4 6 Aluminum M6 X 1.0P HBSM6X35A
DN35CF-DN40CF (2.75" OD) 2 25 Stainless Steel M6 X 1.0P HBSM6X50
DN63CF (4.50" OD) 1.8 25 Stainless Steel M8 X 1.25P HBSM8X45
DN63CF (4.50" OD) 2 8 Aluminum M8 X 1.25P HBSM8X50A
DN63CF (4.50" OD) 2.4 25 Stainless Steel M8 X 1.25P HBSM8X60
DN63CF (4.50" OD) 2.4 25 Stainless Steel M8 X 1.25P HBSM8X60
DN100CF (6.00" OD) 2 25 Stainless Steel M8 X 1.25P HBSM8X50
DN100CF (6.00" OD) 2.2 16 Aluminum M8 X 1.25P HBSM8X55A-6
DN100CF (6.00" OD) 3 25 Stainless Steel M8 X 1.25P HBSM8X70
DN160CF (8.00" OD) 2.3 20 Aluminum M8 X 1.25P HBSM8X55A
DN160CF (8.00" OD) 2.2 20 Aluminum M8 X 1.25P HBSM8X55A-8
DN160CF (8.00" OD) 2.4 25 Stainless Steel M8 X 1.25P HBSM8X60
DN160CF (8.00" OD) 2.4 25 Stainless Steel M8 X 1.25P HBSM8X60
DN200CF (10.00" OD) 2.6 24 Aluminum M8 X 1.25P HBSM8X65A
DN250CF (12.00" OD) 3 32 Aluminum M8 X 1.25P HBSM8X70A

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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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