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Imperial Plate Nuts (Clearance Flanges)

Imperial Plate Nuts (Clearance Flanges)

Imperial Plate Nuts (Clearance Flanges)

TFM’s Imperial Plate Nuts (Clearance Flanges) are precision-engineered components designed for use in ultra-high vacuum (UHV), semiconductor, and industrial vacuum systems. These plate nuts provide a reliable and reusable fastening solution for flange assemblies with clearance holes, ensuring strong mechanical connections and consistent sealing performance.

Key Features

  • Designed for Clearance Flanges
    Specifically manufactured for use with clearance flange systems, TFM’s Imperial Plate Nuts (Clearance Flanges) are ideal for applications where flange holes are not threaded. These nuts support bolt pass-through from the mating flange, creating secure joints that can withstand repeated assembly.

  • Imperial Thread Sizing
    Offered in standard imperial sizes such as ¼-20 and 10-32, these plate nuts pair perfectly with TFM’s vented or standard hex bolts in inch-based flange setups.

  • Durable Stainless Steel Construction
    Built from corrosion-resistant 304 or 316 stainless steel, these nuts deliver high mechanical strength and vacuum compatibility. Their performance remains stable under high heat, pressure, and UHV conditions.

  • Floating Nut Design for Easy Installation
    The floating plate design allows slight movement of the nut for bolt-hole alignment. This reduces installation errors, speeds up assembly, and minimizes cross-threading during equipment servicing or flange changes.

  • Cleanroom & Vacuum Compatible
    TFM provides Imperial Plate Nuts (Clearance Flanges) cleaned and vacuum-sealed upon request, making them ready for cleanroom use and critical UHV applications.

Applications

  • UHV and Vacuum Flange Assemblies
    Essential for use in systems utilizing clearance holes, including ConFlat-style flanges or custom vacuum chamber designs.

  • Semiconductor and Thin Film Equipment
    Utilized in plasma chambers, PVD tools, and other semiconductor processing environments where precise, clean fastening is required.

  • Research and Laboratory Vacuum Systems
    Commonly used in experimental vacuum chambers or beamline equipment where modular flange connections are necessary.

  • Industrial and Aerospace Systems
    Durable enough for high-vibration environments and industrial-scale vacuum systems that require imperial-threaded fasteners.

Specifications

  • Threads: UNC (¼-20, 10-32, etc.)

  • Materials: 304 or 316 stainless steel

  • Style: Floating nut plate

  • Configuration: For use with bolts and clearance hole flanges

  • Options: Cleaned, vacuum-packaged versions available

Why TFM?

TFM’s Imperial Plate Nuts (Clearance Flanges) are the trusted choice for professionals working in precision vacuum, aerospace, and semiconductor industries. With robust performance, repeatable installation, and UHV compatibility, these nuts ensure your flange assemblies are built to the highest standards.

Ordering Table

Drawing Flange OD Per Package Thread Size Dim A Dim B Dim C Part Number
Tooltip DN16CF (1.33" OD) 24 #8-32 0.80 0.30 0.53 PN-0133
Tooltip DN35CF-DN40CF (2.75" OD) 24 1/4-28 1.66 0.50 1.16 PN-0275
Tooltip DN50CF (3.375" OD) 24 5/16-24 1.75 0.50 1.09 PN-0337
Tooltip DN63CF (4.50" OD) 24 5/16-24 2.03 0.50 1.39 PN-0450
Tooltip DN100CF (6.00" OD) 24 5/16-24 1.64 0.50 1.00 PN-0600
Tooltip DN160CF (8.00" OD) 24 5/16-24 1.75 0.50 1.12 PN-0800
Tooltip DN200CF (10.00" OD) 24 5/16-24 1.75 0.50 1.19 PN-1000

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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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