--- title: "M4 M5 M6 M8 M10 M12captured Square Captive Nut" description: "M4 M5 M6 M8 M10 M12captured Square Captive Nut — Quarter-Turn, Captive & Panel Fasteners. MOQ 100 pieces, US$0.048 – 6.00." url: https://engineeringhardware.com/product/m4-m5-m6-m8-m10-m12captured-square-captive-nut/ source: Engineering Hardware & Fasteners --- # M4 M5 M6 M8 M10 M12captured Square Captive Nut [![M4 M5 M6 M8 M10 M12captured Square Captive Nut](https://img.engineeringhardware.com/M4-M5-M6-M8-M10-M12captured-Square-Captive-Nut.webp)](https://img.engineeringhardware.com/M4-M5-M6-M8-M10-M12captured-Square-Captive-Nut.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Specialty Fasteners › Quarter-Turn, Captive & Panel Fasteners](https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/m4-m5-m6-m8-m10-m12captured-square-captive-nut.md) Model no. **CN** US$0.048 – 6.00 / piece MOQ 100 pieces · Final price confirmed in your quote - **Material:** Stainless Steel/Carbon Steel/Special Alloy/Ti - **Head Style:** Square - **Standard:** DIN, ANSI, GB, JIS - **Grade:** as Required - **Custom:** Available - **Package Size:** 35.00cm * 25.00cm * 20.00cm - **Size:** Metric coarse or specified fine threads, plus inch UNC or UNF threads. Examples include M3, M6, M10, #8-32 and 1/4-20; available sizes depend on the selected standard or design. - **Finishes:** Plain, Passivated, Zinc Plated, Black Oxide, Nickel Plated, Chrome Plated, Hot-Dip Galvanized and custom finishes. Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20M4%20M5%20M6%20M8%20M10%20M12captured%20Square%20Captive%20Nut%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fm4-m5-m6-m8-m10-m12captured-square-captive-nut%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 | | --- | --- | | Material | Stainless Steel/Carbon Steel/Special Alloy/Ti | | Type | Square Head | | Model NO. | CN | | Connection | Common Bolt | | Head Style | Square | | Standard | DIN, ANSI, GB, JIS | | Grade | as Required | | Custom | Available | | Lead Time | 3 to 45 Days | | Trade Term | EXW, Fca, Fob, CFR , CIF, DAP or DDP | | Sampling | Available | | Transport Package | Cartons with Waterproof Film and Wooden Frame | | Specification | As Required | | Origin | China | | HS Code | 7318160000 | | Production Capacity | 10000 Tons/Year | | Package Size | 35.00cm * 25.00cm * 20.00cm | | Package Gross Weight | 25.000kg | | Size | Metric coarse or specified fine threads, plus inch UNC or UNF threads. Examples include M3, M6, M10, #8-32 and 1/4-20; available sizes depend on the selected standard or design. | | Stainless Steel | SS303, SS304, SS304L, SS316, SS316L, SS321, SS410, SS420 | | Duplex & Special Alloys | 2205, 2507, 904L, 254SMO, Titanium, Inconel, Hastelloy, Monel | | Carbon & Alloy Steel | C20, C45, 1010, 1035, 1045 | | Finishes | Plain, Passivated, Zinc Plated, Black Oxide, Nickel Plated, Chrome Plated, Hot-Dip Galvanized and custom finishes. | | Standards | DIN 557 for standard metric square nuts and DIN 562 for thin metric square nuts. Inch-series and non-standard designs are supplied to the specified drawing. | | ViaWay Global | Reliable Manufacturing Support for Global Industrial Buyers | | Use | Chemical composition and material grade verification. | | CNC Machining | Precision CNC turning, milling, drilling, tapping, and threading for non-standard fasteners, special alloy parts, and custom hardware components. | | Cold forming | Supported for standard and semi-standard fasteners such as bolts, screws, nuts, rivets, and other formed metal parts in suitable quantities. The suitable process will be selected according to material, size, structure, tolerance, and order quantity. | | Hot forging | Available for large-size fasteners, heavy-duty components, and custom hardware parts that require higher strength, durable structure, and further machining after forging. | | Small-Batch Support | Low-volume, trial, and project-based production for custom fasteners, special alloy components, and drawing-based hardware parts before larger repeat orders are supported. | | Stamping & Bending Support | Stamped and bent metal parts such as brackets, clips, plates, pipe clamps, and curtain wall connectors are supported. These parts can be produced according to drawings, samples, dimensions, or project requirements. | | Surface Treatment | Surface treatment options include passivation, pickling, polishing, electro polishing, sand blasting, black oxide, plating, GEOMET, Dacromet and other finishes according to material grade and application requirements. | | Metarials Supports | 304 / 316 / 316L Stainless Steel | | Category | [Quarter-Turn, Captive & Panel Fasteners](https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/) | ## Technical parameters | Size: | Metric coarse or specified fine threads, plus inch UNC or UNF threads. Examples include M3, M6, M10, #8-32 and 1/4-20; available sizes depend on the selected standard or design. | | --- | --- | | Materials: | Stainless Steel: SS303, SS304, SS304L, SS316, SS316L, SS321, SS410, SS420Duplex & Special Alloys: 2205, 2507, 904L, 254SMO, Titanium, Inconel, Hastelloy, MonelCarbon & Alloy Steel: C20, C45, 1010, 1035, 1045 | | Finishes: | Plain, Passivated, Zinc Plated, Black Oxide, Nickel Plated, Chrome Plated, Hot-Dip Galvanized and custom finishes. | | Product Types | Standard square nuts, thin square nuts and custom heavy or oversized square nuts | | Standards: | DIN 557 for standard metric square nuts and DIN 562 for thin metric square nuts. Inch-series and non-standard designs are supplied to the specified drawing. | | Trade Terms | EXW, FCA, FOB, CFR , CIF or DDP. | | Sample Service | Available samples can be provided for evaluation. Custom samples may involve material or tooling costs. | | Packing | Bulk packed in cartons, up to 25 kg per carton, with export pallets, waterproof film, wooden cases or customized packaging. | | 304 / 316 / 316L Stainless Steel | General corrosion-resistant stainless steel options for standard and custom fasteners, machinery assembly, marine, outdoor, and industrial use. | | --- | --- | | Duplex 2205 / 2507 | Can be reviewed for chloride, offshore, chemical, desalination, and more demanding corrosion environments when required by project conditions. | | Titanium Alloy | Lightweight and corrosion-resistant material options for selected aerospace, marine, chemical, and precision equipment applications. | | Nickel-Based Superalloys | Inconel 718 / 625 can be reviewed for high-temperature, high-strength, or severe chemical environments. Hastelloy and Monel options can also be reviewed for selected chemical, seawater, and marine applications | | Specialty Stainless & Non-Ferrous Materials | 904L, 310 / 310S, A286, 17-4PH, Nitronic 60, 254SMO, and other project-based materials can be reviewed according to requirements. | | Custom Material on Request | Custom material options can be reviewed according to drawings, samples, standards, or project requirements. Final material selection should be confirmed according to drawings, standards, and service environment. | ## Description M4 M5 M6 M8 M10 M12captured Square Captive Nut is part of our quarter-turn, captive & panel fasteners range (Specialty Fasteners). ### Key details - **Type:** Square Head - **Standard:** DIN, ANSI, GB, JIS - **Material:** Stainless Steel/Carbon Steel/Special Alloy/Ti - **Grade:** as Required - **Head Style:** Square - **Connection:** Common Bolt - **Custom:** Available - **Trade Term:** EXW, Fca, Fob, CFR , CIF, DAP or DDP Available configurations include material, head style, standard, grade and custom. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 100 pieces at US$0.048 – 6.00 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 M4 M5 M6 M8 M10 M12captured Square Captive Nut? The listed minimum order is 100 pieces, at US$0.048 – 6.00 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 M4 M5 M6 M8 M10 M12captured Square Captive Nut? Type: Square Head; Standard: DIN, ANSI, GB, JIS; Material: Stainless Steel/Carbon Steel/Special Alloy/Ti; Grade: as Required; Head Style: Square; Connection: Common Bolt. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include material, head style, standard, grade and custom. 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 quarter-turn, captive & panel fasteners are available? The Quarter-Turn, Captive & Panel Fasteners category lists 403 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/](https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/) 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 Quarter-Turn, Captive & Panel Fasteners →](https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/) [![Stainless Steel M3 Hex Socket Head Cap Captive Screw](https://img.engineeringhardware.com/Stainless-Steel-M3-Hex-Socket-Head-Cap-Captive-Screw.webp)](https://engineeringhardware.com/product/stainless-steel-m3-hex-socket-head-cap-captive-screw/) Quarter-Turn, Captive & Panel Fasteners ### [Stainless Steel M3 Hex Socket Head Cap Captive Screw](https://engineeringhardware.com/product/stainless-steel-m3-hex-socket-head-cap-captive-screw/) Cap Head · DIN, GB, Per Customers' Desire **US$0.024 – 0.24**MOQ 1,000 pieces [![Solar Accessories 304 Stainless Steel Solar Panel Screws with 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Captive Screw Slotted Hand Tighten Panel Screw for Cabinet](https://img.engineeringhardware.com/Wxsny-Customized-Aluminum-Captive-Fastener-Spring-Loaded-Captive-Screw-Slotted-Hand-Tighten-Panel-Screw-for-Cabinet.webp)](https://engineeringhardware.com/product/wxsny-customized-aluminum-captive-fastener-spring-loaded-captive-screw-slotted-hand/) Quarter-Turn, Captive & Panel Fasteners ### [Wxsny Customized Aluminum Captive Fastener Spring Loaded Captive Screw Slotted Hand Tighten Panel Screw for Cabinet](https://engineeringhardware.com/product/wxsny-customized-aluminum-captive-fastener-spring-loaded-captive-screw-slotted-hand/) Star/Round/L/Flat/Custom · DIN, GB, ANSI, BSW, JIS, GOST **US$0.036 – 0.24**MOQ 500 pieces **US$0.048 – 6.00**MOQ 100 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20M4%20M5%20M6%20M8%20M10%20M12captured%20Square%20Captive%20Nut%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fm4-m5-m6-m8-m10-m12captured-square-captive-nut%2F)