--- product_id: 62842508 title: "4-Way KF (QF) Reducer Crosses, ISO-KF Flange Size NW-40 to NW-25 Vacuum Fittings, 304 Stainless Steel Adapter Vacuum Oven Fitting" brand: "lab outlet" price: "€ 140.15" currency: EUR in_stock: true category: "Lab Outlet" url: https://www.desertcart.pt/products/62842508-4-way-kf-qf-reducer-crosses-iso-kf-flange-size store_origin: PT region: Portugal --- # Quick assembly with reusable elastomer seals ISO-KF NW-40 to NW-25 precision fit 304 stainless steel corrosion resistance 4-Way KF (QF) Reducer Crosses, ISO-KF Flange Size NW-40 to NW-25 Vacuum Fittings, 304 Stainless Steel Adapter Vacuum Oven Fitting **Brand:** lab outlet **Price:** € 140.15 **Availability:** ✅ In Stock ## Summary > 🔧 Connect with Confidence: The ultimate quick-flange reducer cross for pros who demand speed and reliability. ## Quick Answers - **What is this?** 4-Way KF (QF) Reducer Crosses, ISO-KF Flange Size NW-40 to NW-25 Vacuum Fittings, 304 Stainless Steel Adapter Vacuum Oven Fitting by lab outlet - **How much does it cost?** € 140.15 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/62842508-4-way-kf-qf-reducer-crosses-iso-kf-flange-size) ## Best For - lab outlet enthusiasts ## Why This Product - Trusted lab outlet brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durability Meets Design:** Crafted from premium 304 stainless steel to resist corrosion and maintain integrity under demanding conditions. - • **Seamless Vacuum Integration:** ISO-KF standard flanges ensure airtight NW-40 to NW-25 connections for flawless vacuum systems. - • **Versatile Application Ready:** Ideal for vacuum ovens, foreline plumbing, and high-vacuum chambers handling water, oil, gas, and corrosive liquids. - • **Compact Precision Engineering:** Optimized dimensions (5.12" x 2.22") for space-efficient system builds without compromising performance. - • **Effortless Assembly & Maintenance:** Quick flange design with reusable elastomer O-rings enables rapid setup and repeated use without downtime. ## Overview This 4-Way KF (QF) Reducer Cross vacuum fitting, sized NW-40 to NW-25, is engineered to ISO-KF standards using corrosion-resistant 304 stainless steel. Designed for high-vacuum applications, it features quick assembly with reusable elastomer seals, making it perfect for efficient, durable vacuum plumbing and process systems. ## Description These KF-40 to KF-25 Reducer Cross vacuum fittings follow ISO-KF standards and have a flange size of NW-40 to NW-25. They are commonly used to build foreline vacuum plumbing and process systems. They are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges. The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant 304 stainless steel.Specification:Reducer Cross KF-40 to KF-25ISO-KF Flange Size: NW-40 to NW-25Common Dimensions: A= 5.12" (130mm), B= 2.22" (58mm)Material: Stainless SteelMedium: Water, Oil, Gas and some corrosive liquidsApplications: Vacuum IndustryPackage included:1 * Reducer Cross ## Features - ISO-KF Flange Size: NW-40 to NW-25, Common Dimensions: A= 5.12" (130mm), B= 2.22" (58mm) - These KF-40 to KF-25 Reducer Cross vacuum fittings follow ISO-KF standards and have a flange size of NW-40 to NW-25. - KF Flanges are ideal for high vacuum applications requiring frequent assembly and disassembly. Elastomer seals are reusable and allow for fast assembly. - The KF (QF) flange is used for through- or foreline vacuum plumbing and for simple HV chamber ports. - Material: Stainless Steel, Package included:1 * Reducer Cross ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01MSWDOZF | | Best Sellers Rank | #1,426,317 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4,215 in Hydraulic Fittings | | Brand Name | LAB OUTLET | | Color | Silver | | Connector Type | Reducer | | Exterior Finish | Stainless Steel | | Manufacturer | LAB OUTLET | | Material Type | Stainless Steel | | Number of Pieces | 1 | | Size | NW-40 to NW-25 (40mm to 25mm inner diameter) | | Thread Type | KF | | UPC | 644650671953 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** LAB OUTLET - **Color:** Silver - **Connector Type:** Reducer - **Exterior Finish:** Stainless Steel - **Manufacturer:** LAB OUTLET - **Material:** Stainless Steel - **Number of Packs:** 1 - **Number of Pieces:** 1 - **Size:** NW-40 to NW-25 (40mm to 25mm inner diameter) - **Thread Type:** KF ## Images ![4-Way KF (QF) Reducer Crosses, ISO-KF Flange Size NW-40 to NW-25 Vacuum Fittings, 304 Stainless Steel Adapter Vacuum Oven Fitting - Image 1](https://m.media-amazon.com/images/I/51CV4hIp6IL.jpg) ![4-Way KF (QF) Reducer Crosses, ISO-KF Flange Size NW-40 to NW-25 Vacuum Fittings, 304 Stainless Steel Adapter Vacuum Oven Fitting - Image 2](https://m.media-amazon.com/images/I/61ZJ7P41+GL.jpg) ![4-Way KF (QF) Reducer Crosses, ISO-KF Flange Size NW-40 to NW-25 Vacuum Fittings, 304 Stainless Steel Adapter Vacuum Oven Fitting - Image 3](https://m.media-amazon.com/images/I/61Bq-bg9uwL.jpg) ![4-Way KF (QF) Reducer Crosses, ISO-KF Flange Size NW-40 to NW-25 Vacuum Fittings, 304 Stainless Steel Adapter Vacuum Oven Fitting - Image 4](https://m.media-amazon.com/images/I/51WEbowKQsL.jpg) ![4-Way KF (QF) Reducer Crosses, ISO-KF Flange Size NW-40 to NW-25 Vacuum Fittings, 304 Stainless Steel Adapter Vacuum Oven Fitting - Image 5](https://m.media-amazon.com/images/I/61GpfcW7HNL.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/62842508-4-way-kf-qf-reducer-crosses-iso-kf-flange-size](https://www.desertcart.pt/products/62842508-4-way-kf-qf-reducer-crosses-iso-kf-flange-size) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-11-14*