Description

KF Vacuum Flange End Cap – 304 Stainless Steel | KF16, KF25, KF40, KF50 | USA Lab

Our USA Lab KF flange end cap is machined from premium 304 stainless steel to securely cap unused ISO-KF (NW/QF) ports. Pair with the correct KF centering ring with O-ring and wing-nut clamp for a clean, leak-minimized seal during vacuum operation or system maintenance.

Available sizes: KF16, KF25, KF40, and KF50. Durable, corrosion-resistant, and reusable for laboratories, pilot systems, and process skids.

Designed for quick installation and tool-less service, these blanks help isolate lines, protect pumps/instruments, and keep manifolds contamination-free.

304 Stainless Steel ISO-KF (NW/QF) KF16–KF50 Reusable Vacuum Blank

Clean, Secure Seal: Caps unused KF ports when used with a centering ring and clamp.

304 SS Construction: Corrosion-resistant, durable, and easy to sanitize.

Fast Turnaround: Drop-in ISO-KF fit for KF16, KF25, KF40, KF50 — quick, tool-less install.

Why buy from USA Lab

Expert Support
Engineers & technicians on staff.

Quality First
Tested and trusted products.

Fast Fulfillment
Nationwide 1-2 day shipping.

Warranty & Parts
US-based service & spares.

Why this KF end cap?

ISO-KF compliant — Fits standard NW/QF hardware for straightforward integration.
Protects your system — Prevents contamination and moisture ingress on idle ports.
Built to last — 304 stainless steel for everyday lab and light industrial service.
Multiple sizes — Stocked in KF16, KF25, KF40, KF50 to match your manifold.
Easy maintenance — Smooth machined surfaces clean quickly between uses.

Talk to an expert

Get help selecting the correct KF size, centering ring, and clamp.

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Technical Specifications

Model	USA Lab KF Vacuum Flange End Cap – 304 Stainless Steel
Available Sizes	KF16, KF25, KF40, KF50 (ISO-KF/NW/QF)
Material	304 Stainless Steel (SS304)
Connection Interface	ISO-KF vacuum flange; use with matching centering ring (O-ring) & clamp
Finish	Precision machined; smooth, cleanable surface
Reusability	Reusable; inspect sealing surfaces before reuse
Typical Applications	Blanking unused ports, isolating lines, pump/instrument protection
Compatibility	KF components, vacuum manifolds, traps, pumps, gauges (size-matched)
What’s Included	One KF stainless-steel end cap (centering ring and clamp sold separately)

Popular Industries & Use Cases

Vacuum Hardware Laboratory Fittings Chemical Sciences Academic & Research

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Custom Solutions

Tailored tanks, skids, and integration help.

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FAQ

What sizes are available for the USA Lab KF Vacuum Flange End Cap – 304 Stainless Steel?

The USA Lab KF Vacuum Flange End Cap – 304 Stainless Steel is offered in KF16, KF25, KF40, and KF50 to match standard ISO-KF hardware.

What do I need to seal the USA Lab KF Vacuum Flange End Cap – 304 Stainless Steel?

Use a size-matched KF centering ring with O-ring and a KF clamp. The USA Lab KF Vacuum Flange End Cap – 304 Stainless Steel installs quickly without tools.

Is the USA Lab KF Vacuum Flange End Cap – 304 Stainless Steel reusable?

Yes. The USA Lab KF Vacuum Flange End Cap – 304 Stainless Steel is reusable. Inspect sealing faces and O-rings before each use.

What material is the USA Lab KF Vacuum Flange End Cap – 304 Stainless Steel made from?

It is manufactured from SS304 for corrosion resistance, durability, and easy cleaning.

Important Shipping Notice!

DISCLAIMER:

All items are carefully packaged to ensure safe delivery. In the rare event that your item arrives damaged, please notify us within 3 days of receipt. We will promptly provide a replacement or issue a refund.

Please note that any damage occurring after delivery is not covered under warranty. We appreciate your understanding and your trust in our products.

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Specifications

Brand:	USA Lab
Material:	304 SS
Fittings Style:	KF
Warranty Term:	1 Year
Return Window:	30 Days
Lead Time:	1-3 Days

Shipping & Returns

1–3 Business Days Standard Processing

Return Policy ↗ Varies by Product Warranty Policy ↗ Varies by Product

3 Days to Claim Inspect on Arrival

Shipping

Orders ship within 1–3 business days after payment clears. We ship Monday through Friday via UPS, USPS, and freight carriers.
Freight items (crated, hazmat, dropship, or special packaging) can take 1–5 business days to ship.
Expedited shipping speeds up transit, not processing. Contact us for true rush orders.
PO Box addresses ship USPS. Alcohols, chemicals, and hazmat cannot ship to a PO Box.

Full Shipping Policy

Delivery & Damage Claims

Inspect every shipment on arrival. Claims must be filed within 3 business days.
Visible damage? Refuse the delivery and have the driver document it. We will file the claim and ship a replacement.
Concealed damage: contact us within 2 days with photos of the packaging and item. Keep all packing materials.
Freight services (liftgate, residential, inside delivery) are the customer's responsibility to select for their location.

Damage & Freight Details

Returns

USA Lab branded products are returnable within 30 days of order date with prior authorization. Email us before sending anything back.
Solvents, chemicals, and consumables are not returnable once shipped. Custom and made-to-order items are final sale.
Unused items in original packaging carry a 15% restocking fee. Defective items ship back on us.
Items showing any signs of use, wear, contamination, or modification are not eligible for return.
Glassware damage must be reported within 3 business days of delivery for replacement or refund.

Full Return Policy

Custom & Made-to-Order Items

Customized and made-to-order products are final sale and not eligible for return under any circumstances.
This includes ductless fume hoods, configured tanks and reactors, and any item built to your specifications.
These products are manufactured specifically for your application. Confirm sizing, voltage, and configuration with our team before ordering.
Damage claim coverage still applies. Inspect on arrival and report issues within 3 business days.

Return Eligibility Details

Warranty

USA Lab products are covered against manufacturing defects for up to 3 years, depending on product line.
1 year: chillers, heaters, rotovaps, reactors, vacuum ovens, mixers, and most equipment. 2 years: UVP vacuum pumps. 3 years: scientific freeze dryers.
Wear items (glassware, gaskets, heating elements, sensors) and fittings/steel are not covered. Report defects within 30 days (3 days for glass).
Non–USA Lab brands are covered by their manufacturer's warranty. See the product's Warranty tab.

Full Warranty Policy

International Orders

Import duties, taxes, VAT, and brokerage fees are not collected by USA Lab and are the receiver's responsibility.
Verify your country's customs charges and import restrictions before ordering.
Refused or unclaimed international shipments are refunded minus shipping and a 15% restocking fee.
International orders are generally non-returnable. Damaged items must be reported within 3 business days.

International Guidelines

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Summaries above are provided for convenience. The full Policies & Warranty Info pages govern all orders and may be updated at any time.

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USA Lab KF End Cap - KF16, KF25 & KF40

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