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Vented Stainless Steel Bolts (metric)

Vented Stainless Steel Bolts (Metric)

TFM supplies high-quality Vented Stainless Steel Bolts (Metric) designed specifically for high-vacuum and ultra-high-vacuum (UHV) environments. These precision-engineered bolts feature a central vent hole to allow trapped gases to escape, minimizing virtual leaks and enhancing vacuum system performance during pump-down.

Key Features

  • Axially Vented Design: A precision-drilled hole runs through the bolt’s centerline to release trapped air or gas from blind-tapped holes, significantly reducing outgassing and vacuum pump-down times.

  • Stainless Steel Construction: Made from durable and corrosion-resistant 304 or 316 stainless steel, ensuring long-term reliability in demanding environments.

  • Metric Threads: Standard metric thread sizes for compatibility with vacuum chambers, flanges, and components across a wide range of international systems.

  • Cleanroom Compatible: Each bolt is vacuum cleaned and double-bagged, making it ready for immediate use in cleanroom and vacuum assembly operations.

  • Galling Resistance: Optional silver or MoS₂ coating available to reduce galling during repeated assembly cycles.

Vented Stainless Steel Bolts (Metric) Applications

  • Ultra-high vacuum (UHV) and high-vacuum systems

  • Semiconductor fabrication tools

  • Analytical instrumentation (e.g., XPS, SEM, TEM systems)

  • Research-grade vacuum chambers

  • Aerospace and cryogenic equipment

Why Choose TFM?

TFM’s vented metric stainless steel bolts combine precision manufacturing with premium materials to support critical applications in scientific, industrial, and aerospace fields. We offer fast shipping, custom sizing, and expert support to meet your technical needs.

Dimensional Drawings

Ordering Table

Reference Material Thread Size Part Number
Metric Headbolts Stn Stl M2 X 0.4P HCHM0204-004S40V
Metric Headbolts Stn Stl M2 X 0.4P HCHM0204-005S40V
Metric Headbolts Stn Stl M2 X 0.4P HCHM0204-006S40V
Metric Headbolts Stn Stl M2.5 X 0.45P HCHM2545-004S40V
Metric Headbolts Stn Stl M2.5 X 0.45P HCHM2545-005S40V
Metric Headbolts Stn Stl M2.5 X 0.45P HCHM2545-006S40V
Metric Headbolts Stn Stl M2.5 X 0.45P HCHM2545-008S40V
Metric Headbolts Stn Stl M3 X 0.5P HCHM0305-004S40V
Metric Headbolts Stn Stl M3 X 0.5P HCHM0305-005S40V
Metric Headbolts Stn Stl M3 X 0.5P HCHM0305-006S40V
Metric Headbolts Stn Stl M3 X 0.5P HCHM0305-008S40V
Metric Headbolts Stn Stl M4 X 0.7P HCHM0407-005S40V
Metric Headbolts Stn Stl M4 X 0.7P HCHM0407-006S40V
Metric Headbolts Stn Stl M4 X 0.7P HCHM0407-008S40V
Metric Headbolts Stn Stl M4 X 0.7P HCHM0407-010S40V
Metric Headbolts Stn Stl M4 X 0.7P HCHM0407-012S40V
Metric Headbolts Stn Stl M4 X 0.7P HCHM0407-016S40V
Metric Headbolts Stn Stl M5 X 0.8P HCHM0508-006S40V
Metric Headbolts Stn Stl M5 X 0.8P HCHM0508-008S40V
Metric Headbolts Stn Stl M5 X 0.8P HCHM0508-010S40V
Metric Headbolts Stn Stl M5 X 0.8P HCHM0508-012S40V
Metric Headbolts Stn Stl M5 X 0.8P HCHM0508-016S40V
Metric Headbolts Stn Stl M5 X 0.8P HCHM0508-020S40V
Metric Headbolts Stn Stl M6 X 1.0P HCHM0610-008S40V
Metric Headbolts Stn Stl M6 X 1.0P HCHM0610-010S40V
Metric Headbolts Stn Stl M6 X 1.0P HCHM0610-012S40V
Metric Headbolts Stn Stl M6 X 1.0P HCHM0610-016S40V
Metric Headbolts Stn Stl M6 X 1.0P HCHM0610-020S40V
Metric Headbolts Stn Stl M6 X 1.0P HCHM0610-025S40V
Metric Headbolts Stn Stl M8 X 1.25P HCHM0812-010S40V
Metric Headbolts Stn Stl M8 X 1.25P HCHM0812-012S40V
Metric Headbolts Stn Stl M8 X 1.25P HCHM0812-020S40V
Metric Headbolts Stn Stl M8 X 1.25P HCHM0812-025S40V
Metric Headbolts Stn Stl M8 X 1.25P HCHM0812-030S40V

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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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