Choose products to compare anywhere you see 'Add to Compare' or 'Compare' options displayed. Compare All Close Shopping cart items Shopping cart items Keyword search Search Submit search mks Search Submit search Products MKS Capacitance Manometers Compact Pressure Transducers General Purpose Pressure Transducers High Performance Pressure Transducers Industrial Pressure Transducers Reference Pressure Transducers View All Capacitance Manometers Mass Flow Controllers & Meters Mass Flow Controllers Mass Flow Meters In Situ Flow Verifiers Flow Ratio Controllers Mass Flow Controller Accessories Vacuum Gauges Vacuum Pressure Transducers Vacuum Pressure Sensors Vacuum Gauge Controllers Vacuum Gauge Accessories Vacuum Gauge Calibration Legacy Vacuum Gauges Gas Analyzers Mass Spectrometers Tunable Filter Spectrometers FTIR Gas Analyzers NDIR Gas Analyzers Vacuum Flanges & Fittings ISO-KF Flanges & Fittings ISO-MF Flanges & Fittings CF Flanges & Fittings Butt Weld Flanges & Fittings Custom Vacuum Fabrication RF & Microwave Generators Microwave Generators RF Power Generators Pressure Controllers & Valves Pressure Controllers Vacuum Isolation Valves Downstream Exhaust Throttle Valves Upstream Flow Control Valves Gate Valves Plasma & Reactive Gas Solutions Remote Plasma Sources Ozone Generators & Systems Dissolved Gas Foreline Plasma Clean Systems Automation, Control & Sensing Heater Jackets & Traps Special Offers Virtual Booth Newport Ophir Spectra-Physics Atotech ESI Solutions Semiconductor Electronics and Packaging Specialty Industrial Support Global Service Technical Support Technical Resources Contact MKS Company About MKS Investor Relations News & Media Careers Contact Contact Us Online Corporate Offices Sales & Application Support Calibration, Service & Repairs Product Technical Support Products Vacuum Flanges & Fittings ISO-KF Vacuum Flange Components ISO-KF Vacuum Flanges ISO-KF Stainless Steel Blank Flanges with Bore 100319803 Bored Blank Flange, NW100 ISO-KF Flange, 4 in. Tube OD Bore, 304 S.S. Model: 100319803 Bored Blank Flange, NW100 ISO-KF Flange, 4 in. Tube OD Bore, 304 S.S. Bored Blank Flange, NW100 ISO-KF Flange, 4 in. Tube OD Bore, 304 S.S. Model: 100319803 Contact Us Loading... Request a Quote Add to List Add to List Create a New List List Name Required Create a New List Cancel Add to List Your Saved Lists: Preferred List" selected> Add to List Create a New List List Name Required or Create a New List Cancel Add to List 1 item(s) added to 100319803 Bored Blank Flange, NW100 ISO-KF Flange, 4 in. Tube OD Bore, 304 S.S. Continue Shopping View All Saved Lists Compare Add to List Add to List Create a New List List Name Required Create a New List Cancel Add to List Your Saved Lists: Preferred List" selected> Add to List Create a New List List Name Required or Create a New List Cancel Add to List 1 item(s) added to 100319803 Bored Blank Flange, NW100 ISO-KF Flange, 4 in. Tube OD Bore, 304 S.S. Continue Shopping View All Saved Lists Overview Overview The 100319803 Bored Blank ISO-KF Flange features a size NW100 flange and a bore for 4 inch OD vacuum tubing. These bored flanges are made with 304 stainless steel and are designed for connecting various sized vacuum tubing to ISO-KF vacuum flanges. Series 31 ISO-KF vacuum components are designed for use at subatmospheric pressure and use standard interface dimensions defined by the International Standards Organization (ISO) allowing them to be interchangeable with other ISO-KF compliant components. Series 31 components can be used as modular building blocks to create vacuum piping systems. IS-KF flanges are "sexless" with a symmetrical seal so that so that components are rotatable. ISO-KF vacuum flanges are joined by inserting a centering ring between the two flange faces, and securing them with a flange encompassing clamp.
Product Series Overview ISO-KF Stainless Steel Blank Flanges with Bore Technical Specs Technical Specs Component Type Bored Blank Flange Series Series 31 Material 304 Stainless Steel Flange Type ISO-KF Flange Size NW100 Tube OD 4.0 in. Thickness 0.43 in. (11 mm) Inner Diameter 3.87 in. (98 mm) Bore Diameter 4.02 in. (102 mm) Outer Diameter 5.28 in. (134 mm) Dimension "A" 0.20 in. Dimension "B" 4.02 in. Dimension "C" 5.28 in. Technical Specs Component Type Bored Blank Flange Series Series 31 Material 304 Stainless Steel Flange Type ISO-KF Flange Size NW100 Tube OD 4.0 in. Thickness 0.43 in. (11 mm) Inner Diameter 3.87 in. (98 mm) Bore Diameter 4.02 in. (102 mm) Outer Diameter 5.28 in. (134 mm) Dimension "A" 0.20 in. Dimension "B" 4.02 in. Dimension "C" 5.28 in. Bored Blank Flange, NW100 ISO-KF Flange, 4 in. Tube OD Bore, 304 S.S. PART: 100319803 Contact Us Loading... Request a Quote Compare Add to List Add to List Create a New List List Name Required Create a New List Cancel Add to List Your Saved Lists: Preferred List" selected> Add to List Create a New List List Name Required or Create a New List Cancel Add to List 1 item(s) added to 100319803 Bored Blank Flange, NW100 ISO-KF Flange, 4 in. Tube OD Bore, 304 S.S. Continue Shopping View All Saved Lists Overview Technical Specs Need help? Contact an Applications Specialist by sending us an email 100319803 - Drawings & CAD Additional CAD file downloads are not available for this product. CAD File Downloads: Loading... Download Close Close Close 100319803 - Drawings Additional drawings are not available for this product. Close Close 100319803©2026 MKS Inc. All rights reserved.
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To access this and other valuable technical resources, please sign in or register for a new online account. Cancel Add to Cart Bored Blank Flange, NW100 ISO-KF Flange, 4 in. Tube OD Bore, 304 S.S. Part: 100319803 Availability: Contact Us Add to Cart Also available on Newport.com Qty: Availability: Contact Us Shop at Newport.com Ultra-High Velocity Learn More Invalid VAT ID
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