--- title: "M4 M5 M6 M8 Knurled Plastic Brass Insert Nut Hexagon Coupling Nut" description: "M4 M5 M6 M8 Knurled Plastic Brass Insert Nut Hexagon Coupling Nut — Heat-Set, Knurled & Molded-In Inserts. MOQ 1,000 pieces, US$0.036 – 0.24." url: https://engineeringhardware.com/product/m4-m5-m6-m8-knurled-plastic-brass-insert-nut-hexagon-coupling-nut/ source: Engineering Hardware & Fasteners --- # M4 M5 M6 M8 Knurled Plastic Brass Insert Nut Hexagon Coupling Nut [![M4 M5 M6 M8 Knurled Plastic Brass Insert Nut Hexagon Coupling Nut](https://img.engineeringhardware.com/M4-M5-M6-M8-Knurled-Plastic-Brass-Insert-Nut-Hexagon-Coupling-Nut.webp)](https://img.engineeringhardware.com/M4-M5-M6-M8-Knurled-Plastic-Brass-Insert-Nut-Hexagon-Coupling-Nut.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Threaded Inserts & Clinch Fasteners › Heat-Set, Knurled & Molded-In Inserts](https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/heat-set-knurled-molded-in-inserts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/m4-m5-m6-m8-knurled-plastic-brass-insert-nut-hexagon-coupling-nut.md) US$0.036 – 0.24 / piece MOQ 1,000 pieces · Final price confirmed in your quote - **Head Style:** Hexagonal - **Standard:** DIN, ANSI, ASME, Ifi, ISO - **Grade:** Grade 2, 5, 8, 10 - **Material:** Carbon Steel 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%20Knurled%20Plastic%20Brass%20Insert%20Nut%20Hexagon%20Coupling%20Nut%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fm4-m5-m6-m8-knurled-plastic-brass-insert-nut-hexagon-coupling-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 | Connection | Common Bolt | | --- | --- | | Head Style | Hexagonal | | Standard | DIN, ANSI, ASME, Ifi, ISO | | Grade | Grade 2, 5, 8, 10 | | MOQ | 1000PCS | | Certificate | ISO;SGS; RoHS;TUV;ISO9001 | | Sampling Time | 3~5 Workdays | | Transport Package | Bulk in Carton. Then in Pallet | | Specification | M2.5~M20 (6#~1") | | Origin | China | | HS Code | 7318160000 | | Production Capacity | 100tons/Month | | Customization | Available | | Material | Carbon Steel | | Type | Hexagon Head | | Category | [Heat-Set, Knurled & Molded-In Inserts](https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/heat-set-knurled-molded-in-inserts/) | ## Description M4 M5 M6 M8 Knurled Plastic Brass Insert Nut Hexagon Coupling Nut is part of our heat-set, knurled & molded-in inserts range (Threaded Inserts & Clinch Fasteners). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, ANSI, ASME, Ifi, ISO - **Material:** Carbon Steel - **Grade:** Grade 2, 5, 8, 10 - **Head Style:** Hexagonal - **Connection:** Common Bolt - **Certificate:** ISO;SGS; RoHS;TUV;ISO9001 - **Sampling Time:** 3~5 Workdays Available configurations include head style, standard, grade and material. 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$0.036 – 0.24 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 Knurled Plastic Brass Insert Nut Hexagon Coupling Nut? The listed minimum order is 1,000 pieces, at US$0.036 – 0.24 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 Knurled Plastic Brass Insert Nut Hexagon Coupling Nut? Type: Hexagon Head; Standard: DIN, ANSI, ASME, Ifi, ISO; Material: Carbon Steel; Grade: Grade 2, 5, 8, 10; Head Style: Hexagonal; 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 head style, standard, grade 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 heat-set, knurled & molded-in inserts are available? The Heat-Set, Knurled & Molded-In Inserts category lists 395 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/heat-set-knurled-molded-in-inserts/](https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/heat-set-knurled-molded-in-inserts/) 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 Heat-Set, Knurled & Molded-In Inserts →](https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/heat-set-knurled-molded-in-inserts/) [![Fastener Direct Factory Brass Threaded Insert Knurled Nut Injection Molding Copper Nut Round Brass Tall Nut with Slot](https://img.engineeringhardware.com/Fastener-Direct-Factory-Brass-Threaded-Insert-Knurled-Nut-Injection-Molding-Copper-Nut-Round-Brass-Tall-Nut-with-Slot.webp)](https://engineeringhardware.com/product/fastener-direct-factory-brass-threaded-insert-knurled-nut-injection-molding-copper/) Heat-Set, Knurled & Molded-In Inserts ### [Fastener Direct Factory Brass Threaded Insert Knurled Nut Injection Molding Copper Nut Round Brass Tall Nut with Slot](https://engineeringhardware.com/product/fastener-direct-factory-brass-threaded-insert-knurled-nut-injection-molding-copper/) Hexagon Head · DIN, GB, 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0.096**MOQ 5,000 pieces [![Brass / Alloy Copper Knurled Round Thread / Threaded Insert Nut](https://img.engineeringhardware.com/Brass-Alloy-Copper-Knurled-Round-Thread-Threaded-Insert-Nut.webp)](https://engineeringhardware.com/product/brass-alloy-copper-knurled-round-thread-threaded-insert-nut/) Heat-Set, Knurled & Molded-In Inserts ### [Brass / Alloy Copper Knurled Round Thread / Threaded Insert Nut](https://engineeringhardware.com/product/brass-alloy-copper-knurled-round-thread-threaded-insert-nut/) Round Head · DIN, ANSI, GB, JIS, GOST **US$0.0024**MOQ 500 pieces **US$0.036 – 0.24**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%20M4%20M5%20M6%20M8%20Knurled%20Plastic%20Brass%20Insert%20Nut%20Hexagon%20Coupling%20Nut%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fm4-m5-m6-m8-knurled-plastic-brass-insert-nut-hexagon-coupling-nut%2F)