--- title: "SS304 Rustproof Castle Nut for Heavy Machinery Pin Locking" description: "SS304 Rustproof Castle Nut for Heavy Machinery Pin Locking — Slotted & Castle Nuts. MOQ 3,000 pieces, US$0.14." url: https://engineeringhardware.com/product/ss304-rustproof-castle-nut-for-heavy-machinery-pin-locking/ source: Engineering Hardware & Fasteners --- # SS304 Rustproof Castle Nut for Heavy Machinery Pin Locking [![SS304 Rustproof Castle Nut for Heavy Machinery Pin Locking](https://img.engineeringhardware.com/SS304-Rustproof-Castle-Nut-for-Heavy-Machinery-Pin-Locking.webp)](https://img.engineeringhardware.com/SS304-Rustproof-Castle-Nut-for-Heavy-Machinery-Pin-Locking.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Nuts › Slotted & Castle Nuts](https://engineeringhardware.com/fastener-products/nuts/slotted-castle-nuts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/ss304-rustproof-castle-nut-for-heavy-machinery-pin-locking.md) Model no. **Castle Nut** | **US$0.14**3,000–9,999 pieces | **US$0.14**10,000–49,999 pieces | **US$0.14**50,000+ pieces | | --- | --- | --- | MOQ 3,000 pieces · Final price confirmed in your quote - **Material:** Stainless Steel - **Head Style:** Hexagonal - **Standard:** DIN, ANSI, GB - **Grade:** 304 - **Surface Treatment:** Plain - **Package Size:** 30.00cm * 20.00cm * 14.00cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20SS304%20Rustproof%20Castle%20Nut%20for%20Heavy%20Machinery%20Pin%20Locking%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fss304-rustproof-castle-nut-for-heavy-machinery-pin-locking%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 | | Type | Hexagon Head | | Model NO. | Castle Nut | | Connection | Common Bolt | | Head Style | Hexagonal | | Standard | DIN, ANSI, GB | | Grade | 304 | | MOQ | 3000PCS | | Surface Treatment | Plain | | Certificate | ISO9001:2008 | | Manufacture Processing | Cold Forging/ Hot Forging | | Quality Control | 100% QC Test | | Delivery Method | by Sea, by Air or by Express Service | | Delivery Time | 10-15 Days | | Experience | for 20 Years | | Drawings | Accept | | Sample | Sample Avaliable | | Transport Package | Plastic Bag/Boxes and Cartons/Pallets/Customized | | Specification | M6-M24 | | Origin | China | | HS Code | 7318159001 | | Production Capacity | 10000000PCS/Month | | Package Size | 30.00cm * 20.00cm * 14.00cm | | Package Gross Weight | 25.000kg | | Lead Time | 10 days (1 - 3000 Pieces) To be negotiated ( > 3000 Pieces) | | StainlessSteel | SS201,SS303,SS304,SS316,SS410,SS420 | | Category | [Slotted & Castle Nuts](https://engineeringhardware.com/fastener-products/nuts/slotted-castle-nuts/) | ## Technical parameters | Material | StainlessSteel:SS201,SS303,SS304,SS316,SS410,SS420 | | --- | --- | | Grade | SAE J429 Gr.2, 5,8; ASTM A307Gr.A,A193 B7,B8,B8M,A194 2H, Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 and etc. | | Finish | Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G and etc. | | Connection | Common Nut | | Standard | ISO, DIN, ANSI, JIS, BS and Non-standard | | Sample Service | Samples are all in free. | | Certificate | ISO9001,CE, SGS, BV | | Packing | Bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand | | Payment terms | FOB, CIF, CFR, L/C, or others. | | Delivery method | by sea, by air or by express service | | Application | Structural Steel; Metal Buliding; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating and etc. | ## Description SS304 Rustproof Castle Nut for Heavy Machinery Pin Locking is part of our slotted & castle nuts range (Nuts). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, ANSI, GB - **Material:** Stainless Steel - **Grade:** 304 - **Head Style:** Hexagonal - **Surface Treatment:** Plain - **Connection:** Common Bolt - **Certificate:** ISO9001:2008 Available configurations include material, head style, standard, grade and surface treatment. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 3,000 pieces at US$0.14 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 SS304 Rustproof Castle Nut for Heavy Machinery Pin Locking? The listed minimum order is 3,000 pieces, at US$0.14 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$0.14 for 3,000–9,999 pieces; US$0.14 for 10,000–49,999 pieces; US$0.14 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 SS304 Rustproof Castle Nut for Heavy Machinery Pin Locking? Type: Hexagon Head; Standard: DIN, ANSI, GB; Material: Stainless Steel; Grade: 304; Head Style: Hexagonal; Surface Treatment: Plain. 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 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 slotted & castle nuts are available? The Slotted & Castle Nuts category lists 493 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/nuts/slotted-castle-nuts/](https://engineeringhardware.com/fastener-products/nuts/slotted-castle-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 & 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 Slotted & Castle Nuts →](https://engineeringhardware.com/fastener-products/nuts/slotted-castle-nuts/) [![M6-M30 DIN 937 Crown-Shape Stainless Steel 304 Hexagon Head Hex Slotted Castle Nut](https://img.engineeringhardware.com/M6-M30-DIN-937-Crown-Shape-Stainless-Steel-304-Hexagon-Head-Hex-Slotted-Castle-Nut.webp)](https://engineeringhardware.com/product/m6-m30-din-937-crown-shape-stainless-steel-304-hexagon-head-hex-slotted-castle-nut/) Slotted & Castle Nuts ### [M6-M30 DIN 937 Crown-Shape Stainless Steel 304 Hexagon Head Hex Slotted Castle Nut](https://engineeringhardware.com/product/m6-m30-din-937-crown-shape-stainless-steel-304-hexagon-head-hex-slotted-castle-nut/) Castle Type · DIN, ANSI, GB, JIS, BSW **US$0.036 – 0.36**MOQ 10,000 pieces [![Carbon Steel Zinc Plated Coating Hex Castle Hexagon Slotted Nut](https://img.engineeringhardware.com/Carbon-Steel-Zinc-Plated-Coating-Hex-Castle-Hexagon-Slotted-Nut.webp)](https://engineeringhardware.com/product/carbon-steel-zinc-plated-coating-hex-castle-hexagon-slotted-nut/) Slotted & Castle Nuts ### [Carbon Steel Zinc Plated Coating Hex Castle Hexagon Slotted Nut](https://engineeringhardware.com/product/carbon-steel-zinc-plated-coating-hex-castle-hexagon-slotted-nut/) Hexagon Head · DIN, ANSI, GB, JIS, GOST, BSW **US$0.0072**MOQ 50 pieces [![Factory Price Grade 8.8 Hex Slotted Nut M6-M24 Black Oxide Castle Nut](https://img.engineeringhardware.com/Factory-Price-Grade-8-8-Hex-Slotted-Nut-M6-M24-Black-Oxide-Castle-Nut.webp)](https://engineeringhardware.com/product/factory-price-grade-8-8-hex-slotted-nut-m6-m24-black-oxide-castle-nut/) Slotted & Castle Nuts ### [Factory Price Grade 8.8 Hex Slotted Nut M6-M24 Black Oxide Castle Nut](https://engineeringhardware.com/product/factory-price-grade-8-8-hex-slotted-nut-m6-m24-black-oxide-castle-nut/) Auto Fasteners · Steel **US$0.12 – 0.24**MOQ 1,000 pieces [![Black Slotted Nut Hex Slot Castle Nut](https://img.engineeringhardware.com/Black-Slotted-Nut-Hex-Slot-Castle-Nut.webp)](https://engineeringhardware.com/product/black-slotted-nut-hex-slot-castle-nut/) Slotted & Castle Nuts ### [Black Slotted Nut Hex Slot Castle Nut](https://engineeringhardware.com/product/black-slotted-nut-hex-slot-castle-nut/) Hexagon Head With Flange · DIN, ANSI, GB, JIS, GOST, BSW **US$0.60 – 12.00**MOQ 1 kilogram [![M8 M12 M16 M20 Carbon Steel Black Hex Castle Nut Hexagon Self-Locking Slotted Nuts](https://img.engineeringhardware.com/M8-M12-M16-M20-Carbon-Steel-Black-Hex-Castle-Nut-Hexagon-Self-Locking-Slotted-Nuts.webp)](https://engineeringhardware.com/product/m8-m12-m16-m20-carbon-steel-black-hex-castle-nut-hexagon-self-locking-slotted-nuts/) Slotted & Castle Nuts ### [M8 M12 M16 M20 Carbon Steel Black Hex Castle Nut Hexagon Self-Locking Slotted Nuts](https://engineeringhardware.com/product/m8-m12-m16-m20-carbon-steel-black-hex-castle-nut-hexagon-self-locking-slotted-nuts/) Hexagon Head · DIN, ANSI, GB, JIS, GOST, BSW **US$0.0036 – 0.012**MOQ 1,000 pieces [![Zinc Plated Hexagon Slotted Nut/Castle Nut](https://img.engineeringhardware.com/Zinc-Plated-Hexagon-Slotted-Nut-Castle-Nut.webp)](https://engineeringhardware.com/product/zinc-plated-hexagon-slotted-nut-castle-nut/) Slotted & Castle Nuts ### [Zinc Plated Hexagon Slotted Nut/Castle Nut](https://engineeringhardware.com/product/zinc-plated-hexagon-slotted-nut-castle-nut/) Hexagon Head · DIN, ANSI, GB, JIS, GOST, BSW, ISO **US$0.048 – 0.084**MOQ 1,000 pieces [![Custom Machining Stainless Steel Slotted Nuts](https://img.engineeringhardware.com/Custom-Machining-Stainless-Steel-Slotted-Nuts.webp)](https://engineeringhardware.com/product/custom-machining-stainless-steel-slotted-nuts/) Slotted & Castle Nuts ### [Custom Machining Stainless Steel Slotted Nuts](https://engineeringhardware.com/product/custom-machining-stainless-steel-slotted-nuts/) Round Head · DIN, ANSI **US$0.12 – 0.36**MOQ 50 pieces [![DIN935 Hexagon Head Round Slotted Nut Black Stainless Steel Nut](https://img.engineeringhardware.com/DIN935-Hexagon-Head-Round-Slotted-Nut-Black-Stainless-Steel-Nut.webp)](https://engineeringhardware.com/product/din935-hexagon-head-round-slotted-nut-black-stainless-steel-nut/) Slotted & Castle Nuts ### [DIN935 Hexagon Head Round Slotted Nut Black Stainless Steel Nut](https://engineeringhardware.com/product/din935-hexagon-head-round-slotted-nut-black-stainless-steel-nut/) Hexagon Head · DIN, ANSI, GB, JIS, BSW **US$0.30**MOQ 500 pieces **US$0.14**MOQ 3,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20SS304%20Rustproof%20Castle%20Nut%20for%20Heavy%20Machinery%20Pin%20Locking%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fss304-rustproof-castle-nut-for-heavy-machinery-pin-locking%2F)