--- title: "Customized High-Quality Curved Round Hole Square Washer" description: "Customized High-Quality Curved Round Hole Square Washer — Fender, Large-OD & Square Washers. MOQ 1,000 pieces, US$0.12 – 1.20." url: https://engineeringhardware.com/product/customized-high-quality-curved-round-hole-square-washer/ source: Engineering Hardware & Fasteners --- # Customized High-Quality Curved Round Hole Square Washer [![Customized High-Quality Curved Round Hole Square Washer](https://img.engineeringhardware.com/Customized-High-Quality-Curved-Round-Hole-Square-Washer.webp)](https://img.engineeringhardware.com/Customized-High-Quality-Curved-Round-Hole-Square-Washer.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Washers › Fender, Large-OD & Square Washers](https://engineeringhardware.com/fastener-products/washers/fender-large-od-square-washers/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/customized-high-quality-curved-round-hole-square-washer.md) Model no. **EMAX-M20511** US$0.12 – 1.20 / piece MOQ 1,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **size:** OEM Customized - **Surface Treatment:** Plating, Galvanization, Anodized, and Powder coating. Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Customized%20High-Quality%20Curved%20Round%20Hole%20Square%20Washer%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fcustomized-high-quality-curved-round-hole-square-washer%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 | | --- | --- | | Type | Flat Gasket | | Material | Carbon Steel | | Model NO. | EMAX-M20511 | | Combination Washer Packaging | All Inclusive | | Spring Washer Type | Standard | | Transport Package | Carton+Pallet | | Specification | Customized | | Origin | China | | Production Capacity | 20 Tons Per Month | | Product Name | Square washer with round hole | | size | OEM Customized | | Pressing Capacity | 6.3-600Tons | | Processing | Stamping, Punching, Bending, Tapping, Milling, Lathe/Welding, Assembly, Laser cutting | | Surface Treatment | Plating, Galvanization, Anodized, and Powder coating. | | Certification | ISO9001,SGS,CTI,ROHS | | Package | Carton, Wooden Case or as Required | | Country of origin | China | | Category | [Fender, Large-OD & Square Washers](https://engineeringhardware.com/fastener-products/washers/fender-large-od-square-washers/) | ## Technical parameters | Product Name: | Square washer with round hole | | --- | --- | | Material: | Steel, Stainless steel, Aluminum, Brass, Carbon Steel, etc. | | size: | OEM Customized | | Pressing Capacity: | 6.3-600Tons | | Processing: | Stamping, Punching, Bending, Tapping, Milling, Lathe/Welding, Assembly, Laser cutting | | Surface Treatment: | Plating, Galvanization, Anodized, and Powder coating. | | Certification: | ISO9001,SGS,CTI,ROHS | | Package: | Carton, Wooden Case or as Required | | Country of origin: | China | ## Description Customized High-Quality Curved Round Hole Square Washer is part of our fender, large-od & square washers range (Washers). ### Key details - **Type:** Flat Gasket - **Material:** Carbon Steel - **size:** OEM Customized - **Surface Treatment:** Plating, Galvanization, Anodized, and Powder coating. - **Certification:** ISO9001,SGS,CTI,ROHS - **Combination Washer Packaging:** All Inclusive - **Spring Washer Type:** Standard - **Product Name:** Square washer with round hole Available configurations include material, size and surface treatment. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 1,000 pieces at US$0.12 – 1.20 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 Customized High-Quality Curved Round Hole Square Washer? The listed minimum order is 1,000 pieces, at US$0.12 – 1.20 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 Customized High-Quality Curved Round Hole Square Washer? Type: Flat Gasket; Material: Carbon Steel; size: OEM Customized; Surface Treatment: Plating, Galvanization, Anodized, and Powder coating.; Certification: ISO9001,SGS,CTI,ROHS; Combination Washer Packaging: All Inclusive. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include material, size and surface treatment. 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 fender, large-od & square washers are available? The Fender, Large-OD & Square Washers category lists 720 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/washers/fender-large-od-square-washers/](https://engineeringhardware.com/fastener-products/washers/fender-large-od-square-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 Fender, Large-OD & Square Washers →](https://engineeringhardware.com/fastener-products/washers/fender-large-od-square-washers/) [![Stainless Steel Plate Washer CNC Machining](https://img.engineeringhardware.com/Stainless-Steel-Plate-Washer-CNC-Machining.webp)](https://engineeringhardware.com/product/stainless-steel-plate-washer-cnc-machining/) Fender, Large-OD & Square Washers ### [Stainless Steel Plate Washer CNC Machining](https://engineeringhardware.com/product/stainless-steel-plate-washer-cnc-machining/) Stamping · Steel Brass,Aluminum, Stainless Steel... **US$0.12 – 0.60**MOQ 1,000 pieces [![Good Quality Wholesale Customized Top Strength Square Washer Plain Washer Flat Washer Zinc Steel Washer](https://img.engineeringhardware.com/Good-Quality-Wholesale-Customized-Top-Strength-Square-Washer-Plain-Washer-Flat-Washer-Zinc-Steel-Washer.webp)](https://engineeringhardware.com/product/good-quality-wholesale-customized-top-strength-square-washer-plain-washer-flat/) Fender, Large-OD & Square Washers ### [Good Quality Wholesale Customized Top Strength Square Washer Plain Washer Flat Washer Zinc Steel Washer](https://engineeringhardware.com/product/good-quality-wholesale-customized-top-strength-square-washer-plain-washer-flat/) Flat Gasket · DIN/ASME/GB/JIS/Non-Standard **US$0.036 – 0.06**MOQ 1,000 pieces [![High Quality Stainless Steel 316 Application Locking Square Washer](https://img.engineeringhardware.com/High-Quality-Stainless-Steel-316-Application-Locking-Square-Washer.webp)](https://engineeringhardware.com/product/high-quality-stainless-steel-316-application-locking-square-washer/) Fender, Large-OD & Square Washers ### [High Quality Stainless Steel 316 Application Locking Square Washer](https://engineeringhardware.com/product/high-quality-stainless-steel-316-application-locking-square-washer/) Square Head · DIN, ANSI, GB, JIS, GOST, BSW **US$0.006 – 12.00**MOQ 1,000 pieces [![DIN 434 Metric Stainless Steel Square Washer Taper Washer](https://img.engineeringhardware.com/DIN-434-Metric-Stainless-Steel-Square-Washer-Taper-Washer.webp)](https://engineeringhardware.com/product/din-434-metric-stainless-steel-square-washer-taper-washer/) Fender, Large-OD & Square Washers ### [DIN 434 Metric Stainless Steel Square Washer Taper Washer](https://engineeringhardware.com/product/din-434-metric-stainless-steel-square-washer-taper-washer/) Lock Washer · DIN 125A & ANSI & JIS & IFI **US$0.024 – 0.048**MOQ 2,000 pieces [![Black Flat Washers Stainless Steel Fender Lock Washers](https://img.engineeringhardware.com/Black-Flat-Washers-Stainless-Steel-Fender-Lock-Washers.webp)](https://engineeringhardware.com/product/black-flat-washers-stainless-steel-fender-lock-washers/) Fender, Large-OD & Square Washers ### [Black Flat Washers Stainless Steel Fender Lock Washers](https://engineeringhardware.com/product/black-flat-washers-stainless-steel-fender-lock-washers/) Lock Washer · Stainless Steel **US$0.60 – 12.00**MOQ 1 kilogram [![S04 Auto Bumper Fender Fastener Nylon Metal Core Pulling Rivet 7147293278](https://img.engineeringhardware.com/S04-Auto-Bumper-Fender-Fastener-Nylon-Metal-Core-Pulling-Rivet-7147293278.webp)](https://engineeringhardware.com/product/s04-auto-bumper-fender-fastener-nylon-metal-core-pulling-rivet-7147293278/) Fender, Large-OD & Square Washers ### [S04 Auto Bumper Fender Fastener Nylon Metal Core Pulling Rivet 7147293278](https://engineeringhardware.com/product/s04-auto-bumper-fender-fastener-nylon-metal-core-pulling-rivet-7147293278/) Auto Clips · Black **US$2.40 – 4.80**MOQ 2 bags [![Carbon Steel Black Oxide Finished GB97/Is07089/DIN125 Heavy Duty Lock Plain Round Gasket Metal Flat Fender Washer](https://img.engineeringhardware.com/Carbon-Steel-Black-Oxide-Finished-GB97-Is07089-DIN125-Heavy-Duty-Lock-Plain-Round-Gasket-Metal-Flat-Fender-Washer.webp)](https://engineeringhardware.com/product/carbon-steel-black-oxide-finished-gb97-is07089-din125-heavy-duty-lock-plain-round/) Fender, Large-OD & Square Washers ### [Carbon Steel Black Oxide Finished GB97/Is07089/DIN125 Heavy Duty Lock Plain Round Gasket Metal Flat Fender Washer](https://engineeringhardware.com/product/carbon-steel-black-oxide-finished-gb97-is07089-din125-heavy-duty-lock-plain-round/) Flat Gasket · Carbon Steel **US$0.60 – 1.20**MOQ 10,000 pieces [![Colorful Jdm Fender Washer](https://img.engineeringhardware.com/Colorful-Jdm-Fender-Washer.webp)](https://engineeringhardware.com/product/colorful-jdm-fender-washer/) Fender, Large-OD & Square Washers ### [Colorful Jdm Fender Washer](https://engineeringhardware.com/product/colorful-jdm-fender-washer/) Universal · DIN7991 **US$0.36 – 0.60**MOQ 1,000 pieces **US$0.12 – 1.20**MOQ 1,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Customized%20High-Quality%20Curved%20Round%20Hole%20Square%20Washer%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fcustomized-high-quality-curved-round-hole-square-washer%2F)