--- title: "Pbn Pyrolytic Boron Nitride Ceramic Plain Washer Ring" description: "Pbn Pyrolytic Boron Nitride Ceramic Plain Washer Ring — Flat & Other Precision Washers. Material: Cordierite High Alumina. MOQ 1 piece, US$0.0156 – 0.066." url: https://engineeringhardware.com/product/pbn-pyrolytic-boron-nitride-ceramic-plain-washer-ring/ source: Engineering Hardware & Fasteners --- # Pbn Pyrolytic Boron Nitride Ceramic Plain Washer Ring [![Pbn Pyrolytic Boron Nitride Ceramic Plain Washer Ring](https://img.engineeringhardware.com/Pbn-Pyrolytic-Boron-Nitride-Ceramic-Plain-Washer-Ring.webp)](https://img.engineeringhardware.com/Pbn-Pyrolytic-Boron-Nitride-Ceramic-Plain-Washer-Ring.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Washers › Flat & Other Precision Washers](https://engineeringhardware.com/fastener-products/washers/flat-other-precision-washers/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/pbn-pyrolytic-boron-nitride-ceramic-plain-washer-ring.md) Model no. **ceramic ring** US$0.0156 – 0.066 / piece MOQ 1 piece · Final price confirmed in your quote - **Color:** White;Beige - **Material:** Cordierite High Alumina Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Pbn%20Pyrolytic%20Boron%20Nitride%20Ceramic%20Plain%20Washer%20Ring%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fpbn-pyrolytic-boron-nitride-ceramic-plain-washer-ring%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 | | --- | --- | | Application | Refractory | | Color | White;Beige | | Model NO. | ceramic ring | | Material | Cordierite High Alumina | | Type | Ceramic Parts | | Transport Package | Plywood Case | | Specification | M6 National Standard | | Origin | Shanghai, China | | Production Capacity | 50000 PCS/Year | | Category | [Flat & Other Precision Washers](https://engineeringhardware.com/fastener-products/washers/flat-other-precision-washers/) | ## Technical parameters | Characteristic Table of Ceramic Ring | | | | | | | --- | --- | --- | --- | --- | --- | | Name | 99 Porcelain | 95 Porcelain | Zirconia | Talc Porcelain | | | Main Components | AL203>99% | AL203>95% | ZrO2>94% | MgO SiO2 | | | Physical Property | Density | 3.85 | 3.6 | 5.9 | 2.8 | | Water Absorption Rate% | 0 | 0 | 0 | 0 | | | Sintering Temperature ºC | 1700 | 1670 | 1600 | 1350 | | | Material Characteristics | Hardness HV | 1700 | 1600 | 1400 | 800 | | Bending Strength 4PT | >3500 | >2900 | >11000 | 900 | | | Compressive Strength KGF/CM2 | 30000 | 25000 | 25000 | 4000 | | | Thermodynamic Property | Maximum Operating Temperature ºC | 1600 | 1450 | 1300 | 1100 | | Thermal Expansion Coefficient 10-6/ºC 0-1000ºC | 8 | 7.8 | 10 | 6 | | | Heat Resistant Impact Force T(ºC) | 200 | 220 | 350 | 200 | | | Thermal Conductivity W/M.K | 31 | 22 | 3 | 2.5 | | | Electrical Characteristics | Volume Resistivity Ω.CM | >1012 | >1012 | >1012 | >1012 | | Insulation Breaking Strength KT/M | 18 | 16 | 15 | 10 | | | Dielectric Constant 1MHZ(E) | 9.2-10.5 | 9.0-10 | 12.5 | 5.8 | | ## Description Pbn Pyrolytic Boron Nitride Ceramic Plain Washer Ring is part of our flat & other precision washers range (Washers). ### Key details - **Type:** Ceramic Parts - **Material:** Cordierite High Alumina - **Application:** Refractory - **Color:** White;Beige Available configurations include color and material. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 1 piece at US$0.0156 – 0.066 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 Pbn Pyrolytic Boron Nitride Ceramic Plain Washer Ring? The listed minimum order is 1 piece, at US$0.0156 – 0.066 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 Pbn Pyrolytic Boron Nitride Ceramic Plain Washer Ring? Type: Ceramic Parts; Material: Cordierite High Alumina; Application: Refractory; Color: White;Beige. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include color and material. 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 flat & other precision washers are available? The Flat & Other Precision Washers category lists 8,437 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/washers/flat-other-precision-washers/](https://engineeringhardware.com/fastener-products/washers/flat-other-precision-washers/) 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 Flat & Other Precision Washers →](https://engineeringhardware.com/fastener-products/washers/flat-other-precision-washers/) [![Durable High Pressure Thin Flat Shim Washer Carbon Steel Washers](https://engineeringhardware.com/wp-content/uploads/2026/11/subcategory-flat-other-precision-washers-768x512.webp)](https://engineeringhardware.com/product/durable-high-pressure-thin-flat-shim-washer-carbon-steel-washers/) Flat & Other Precision Washers ### [Durable High Pressure Thin Flat Shim Washer Carbon Steel Washers](https://engineeringhardware.com/product/durable-high-pressure-thin-flat-shim-washer-carbon-steel-washers/) **Price on request**MOQ 1 piece [![High-Quality 40cr Alloy Steel Washer with Black Zinc Surface 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