--- title: "Round Flat Joint Sanitary Union Nut – ISO, CE Certified" description: "Round Flat Joint Sanitary Union Nut – ISO, CE Certified — Hex & Other Standard Nuts. MOQ 500 pieces, US$0.36 – 60.00." url: https://engineeringhardware.com/product/round-flat-joint-sanitary-union-nut-iso-ce-certified/ source: Engineering Hardware & Fasteners --- # Round Flat Joint Sanitary Union Nut – ISO, CE Certified [![Round Flat Joint Sanitary Union Nut – ISO, CE Certified](https://img.engineeringhardware.com/Round-Flat-Joint-Sanitary-Union-Nut-ISO-CE-Certified.webp)](https://img.engineeringhardware.com/Round-Flat-Joint-Sanitary-Union-Nut-ISO-CE-Certified.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Nuts › Hex & Other Standard Nuts](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/round-flat-joint-sanitary-union-nut-iso-ce-certified.md) Model no. **Sanitary Union Nut** US$0.36 – 60.00 / piece MOQ 500 pieces · Final price confirmed in your quote - **Standard:** GB3289.37,3298.38-82 - **Material:** Stainless Steel - **Standards:** SMS, DIN, Ldf Rjt, Lso - **Package Size:** 10.00cm * 10.00cm * 10.00cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Round%20Flat%20Joint%20Sanitary%20Union%20Nut%20%26%238211%3B%20ISO%2C%20CE%20Certified%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fround-flat-joint-sanitary-union-nut-iso-ce-certified%2F) Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order. ## Specifications | Customization | Available | | --- | --- | | After-sales Service | 1 Year | | Warranty | 1 Year | | Model NO. | Sanitary Union Nut | | Standard | GB3289.37,3298.38-82 | | Technique | Casting | | Type | Threaded Union | | Material | Stainless Steel | | Connection | Female | | Certificates | ISO, CE | | Trademarke | Qm Stainless | | Standards | SMS, DIN, Ldf Rjt, Lso | | Connection Type | Weld, Clamp, Thread, Flange or Other! | | Transport Package | Plastic Bag, Carton, Plywood Tray | | Origin | Wenzhou | | HS Code | 760900000 | | Production Capacity | 5000 Set / Week | | Package Size | 10.00cm * 10.00cm * 10.00cm | | Package Gross Weight | 1.000kg | | Category | [Hex & Other Standard Nuts](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) | ## Technical parameters | Parameter | Specification | | --- | --- | | Product Name | Hygienic Sanitary Union Nut (Lock Nut for Sanitary Union Fitting) | | Material Options | Stainless Steel 304, Stainless Steel 316L, EN 1.4301, EN 1.4404 | | Applicable Standards | DIN 11850, SMS, RJT, 3A, ISO 2852 | | Size Range | DN10 - DN150 (1/2" - 6") | | Surface Finish | CNC Machined, Electropolished, Ra ≤ 0.8μm (Hygienic Grade) | | Thread Type | Special Sanitary Round Thread (Non-Standard Pipe Thread, for Union Fitting) | | Working Temperature | -20ºC ~ +120ºC | | Application Scenario | Sanitary Valves, Food & Beverage Piping, Pharmaceutical Equipment, Dairy Processing Lines | ## Description Round Flat Joint Sanitary Union Nut – ISO, CE Certified is part of our hex & other standard nuts range (Nuts). ### Key details - **Type:** Threaded Union - **Standard:** GB3289.37,3298.38-82 - **Material:** Stainless Steel - **Connection:** Female - **Warranty:** 1 Year - **Technique:** Casting - **Certificates:** ISO, CE - **Trademarke:** Qm Stainless Available configurations include standard, material, standards and package size. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 500 pieces at US$0.36 – 60.00 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you. ## Frequently asked questions ### What is the minimum order quantity (MOQ) for Round Flat Joint Sanitary Union Nut – ISO, CE Certified? The listed minimum order is 500 pieces, at US$0.36 – 60.00 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### What are the main specifications of Round Flat Joint Sanitary Union Nut – ISO, CE Certified? Type: Threaded Union; Standard: GB3289.37,3298.38-82; Material: Stainless Steel; Connection: Female; Warranty: 1 Year; Technique: Casting. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include standard, material, standards and package size. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing. ### What is the lead time and how is it shipped? Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment. ### Which other hex & other standard nuts are available? The Hex & Other Standard Nuts category lists 8,354 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) How we work ## Specified, checked and shipped by Engineering Hardware & Fasteners Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing. - DIN, ISO, ASTM, ANSI, JIS and GB standard parts - Non-standard parts made to your drawing - Dimensions, thread gauges and plating checked before packing - Export cartons and pallets, consolidated mixed orders - Samples available for approval before mass production [![Production floor](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor-1024x683.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor.webp) Production floor [![Inspection bench](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench.webp) Inspection bench [![Sorting & packing](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing.webp) Sorting & packing [![Parts warehouse](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse.webp) Parts warehouse [![Sample review](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review.webp) Sample review [![Sales office](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office.webp) Sales office [More about us →](https://engineeringhardware.com/about/) · [Request a sample or custom quote →](https://engineeringhardware.com/contact/) ## Request a quote for this product ## Related products [All Hex & Other Standard Nuts →](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) [![Steel-Frame Construction Support Customer Design Shoulder Nut](https://img.engineeringhardware.com/Steel-Frame-Construction-Support-Customer-Design-Shoulder-Nut.webp)](https://engineeringhardware.com/product/steel-frame-construction-support-customer-design-shoulder-nut/) Hex & Other Standard Nuts ### [Steel-Frame Construction Support Customer Design Shoulder Nut](https://engineeringhardware.com/product/steel-frame-construction-support-customer-design-shoulder-nut/) Irregular · DIN, ANSI, GB, JIS, GOST, BSW **US$0.012 – 0.024**MOQ 5,000 pieces [![Galvanized Nut Body Delivers Stable Load Bearing for PV 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