--- title: "Self-Lock Nylon Prevailing Torque Flange Nuts DIN1666" description: "Self-Lock Nylon Prevailing Torque Flange Nuts DIN1666 — Nylon-Insert & All-Metal Lock Nuts. MOQ 10,000 pieces, US$0.0025 – 0.0228." url: https://engineeringhardware.com/product/self-lock-nylon-prevailing-torque-flange-nuts-din1666/ source: Engineering Hardware & Fasteners --- # Self-Lock Nylon Prevailing Torque Flange Nuts DIN1666 [![Self-Lock Nylon Prevailing Torque Flange Nuts DIN1666](https://img.engineeringhardware.com/Self-Lock-Nylon-Prevailing-Torque-Flange-Nuts-DIN1666.webp)](https://img.engineeringhardware.com/Self-Lock-Nylon-Prevailing-Torque-Flange-Nuts-DIN1666.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Nuts › Nylon-Insert & All-Metal Lock Nuts](https://engineeringhardware.com/fastener-products/nuts/nylon-insert-all-metal-lock-nuts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/self-lock-nylon-prevailing-torque-flange-nuts-din1666.md) Model no. **DIN1666-M12-Zinc** | **US$0.0025**10,000–29,999 pieces | **US$0.0228**30,000–49,999 pieces | **US$0.0168**50,000+ pieces | | --- | --- | --- | MOQ 10,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Hexagonal - **Standard:** DIN, ANSI, GB, JIS, GOST, BSW, Uni - **Grade:** 10.9 - **Material Name:** Steel 45 - **Surface Treatment:** Zinc Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Self-Lock%20Nylon%20Prevailing%20Torque%20Flange%20Nuts%20DIN1666%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fself-lock-nylon-prevailing-torque-flange-nuts-din1666%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 | Carbon Steel | | Type | Hexagon Head | | Model NO. | DIN1666-M12-Zinc | | Connection | Common Bolt | | Head Style | Hexagonal | | Standard | DIN, ANSI, GB, JIS, GOST, BSW, Uni | | Grade | 10.9 | | Material Name | Steel 45 | | Property Class | 10 | | Surface Treatment | Zinc | | Transport Package | Euro Pallet+Carton | | Specification | 25kg/carton | | Origin | China | | HS Code | 73181600 | | Production Capacity | 1500tons/Month | | Category | [Nylon-Insert & All-Metal Lock Nuts](https://engineeringhardware.com/fastener-products/nuts/nylon-insert-all-metal-lock-nuts/) | ## Technical parameters | DIN 1666 | | --- | | Thread size d | M8 | M10 | M12 | M14 | M16 | M20 | | --- | --- | --- | --- | --- | --- | --- | | P | 1 | 1 | 1.5 | 1.5 | 1.5 | 1.5 | | - | 1.25 | 1.25 | - | - | - | | | C min | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 | | da | 8-8.75 | 10-10.8 | 12-13 | 14-15.1 | 16-17.3 | 20-21.6 | | dc max | 17.9 | 21.8 | 26 | 29.9 | 34.5 | 42.8 | | dw min | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 | | e min | 14.38 | 17.77 | 20.03 | 23.36 | 26.75 | 32.95 | | h | 11.1-10.4 | 13.5-12.8 | 16.1-15.4 | 18.2-16.9 | 20.3-19 | 24.8-22.7 | | m min | 7.6 | 9.6 | 11.6 | 13.3 | 15.3 | 18.7 | | mw min | 4.6 | 5.9 | 6.8 | 7.7 | 8.9 | 10.7 | | s | 13-12.73 | 16-15.73 | 18-17.73 | 21-20.67 | 24-23.67 | 30-29.16 | | r max | 0.48 | 0.6 | 0.72 | 0.88 | 0.96 | 1.2 | | Our Factory Introduction | | --- | ## Description Self-Lock Nylon Prevailing Torque Flange Nuts DIN1666 is part of our nylon-insert & all-metal lock nuts range (Nuts). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, ANSI, GB, JIS, GOST, BSW, Uni - **Material:** Carbon Steel - **Grade:** 10.9 - **Head Style:** Hexagonal - **Surface Treatment:** Zinc - **Connection:** Common Bolt - **Material Name:** Steel 45 Available configurations include material, head style, standard, grade and material name. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 10,000 pieces at US$0.0025 – 0.0228 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 Self-Lock Nylon Prevailing Torque Flange Nuts DIN1666? The listed minimum order is 10,000 pieces, at US$0.0025 – 0.0228 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### How does the price change with quantity? Volume pricing: US$0.0025 for 10,000–29,999 pieces; US$0.0228 for 30,000–49,999 pieces; US$0.0168 for 50,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of Self-Lock Nylon Prevailing Torque Flange Nuts DIN1666? Type: Hexagon Head; Standard: DIN, ANSI, GB, JIS, GOST, BSW, Uni; Material: Carbon Steel; Grade: 10.9; Head Style: Hexagonal; Surface Treatment: Zinc. 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 material name. 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 nylon-insert & all-metal lock nuts are available? The Nylon-Insert & All-Metal Lock Nuts category lists 2,493 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/nuts/nylon-insert-all-metal-lock-nuts/](https://engineeringhardware.com/fastener-products/nuts/nylon-insert-all-metal-lock-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 & 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custom quote →](https://engineeringhardware.com/contact/) ## Request a quote for this product ## Related products [All Nylon-Insert & All-Metal Lock Nuts →](https://engineeringhardware.com/fastener-products/nuts/nylon-insert-all-metal-lock-nuts/) [![Carbon Steel Nylon Lock Nut DIN985 Self Locking](https://img.engineeringhardware.com/Carbon-Steel-Nylon-Lock-Nut-DIN985-Self-Locking.webp)](https://engineeringhardware.com/product/carbon-steel-nylon-lock-nut-din985-self-locking/) Nylon-Insert & All-Metal Lock Nuts ### [Carbon Steel Nylon Lock Nut DIN985 Self Locking](https://engineeringhardware.com/product/carbon-steel-nylon-lock-nut-din985-self-locking/) Steel · CL4/6/8/10 Ect **US$0.12 – 1.20**MOQ 10 pieces [![Large Diameter Zinc Plated Nylon Insert Lock Nut M24 M30 DIN985 DIN982 Heavy Hex Nylock 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