--- title: "Sems with Lock Washer Curved Spring Washers for Screw Assemblies" description: "Sems with Lock Washer Curved Spring Washers for Screw Assemblies — Assortment Kits & Mixed Fastener Sets. MOQ 1,000 pieces, US$0.012 – 1.20." url: https://engineeringhardware.com/product/sems-with-lock-washer-curved-spring-washers-for-screw-assemblies/ source: Engineering Hardware & Fasteners --- # Sems with Lock Washer Curved Spring Washers for Screw Assemblies [![Sems with Lock Washer Curved Spring Washers for Screw Assemblies](https://img.engineeringhardware.com/Sems-with-Lock-Washer-Curved-Spring-Washers-for-Screw-Assemblies.webp)](https://img.engineeringhardware.com/Sems-with-Lock-Washer-Curved-Spring-Washers-for-Screw-Assemblies.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Fastener Sets & Assemblies › Assortment Kits & Mixed Fastener Sets](https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/sems-with-lock-washer-curved-spring-washers-for-screw-assemblies.md) Model no. **111** US$0.012 – 1.20 / piece MOQ 1,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Socket Head - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Grade:** 4.8 - **Package Size:** 25.00cm * 20.00cm * 20.00cm - **Diameter:** 1/4"-2 1/2",M4-M64 - **Length:** ≤800mm or 30" - **Thread:** M,UNC,UNF Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Sems%20with%20Lock%20Washer%20Curved%20Spring%20Washers%20for%20Screw%20Assemblies%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fsems-with-lock-washer-curved-spring-washers-for-screw-assemblies%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 | Round Head | | Model NO. | 111 | | Groove | Cinquefoil | | Connection | Common Bolt | | Head Style | Socket Head | | Standard | DIN, GB, ANSI, BSW, JIS, GOST | | Grade | 4.8 | | Payment Term | 30% T/T | | Delivery Time | 30-45 Days | | Delivery Term | Fob/CIF/DDP | | Service | OEM/ODM | | Transport Package | Plastic Bag+ Carton+Wood Pallet | | Specification | 1/4"-2 1/2", M4-M64 | | Origin | Shanghai, China | | Production Capacity | 1000 Tons/Month | | Package Size | 25.00cm * 20.00cm * 20.00cm | | Package Gross Weight | 25.000kg | | Diameter | 1/4"-2 1/2",M4-M64 | | Length | ≤800mm or 30" | | Thread | M,UNC,UNF | | Finish | Plain,Black oxide, Zinc Plated(Clear/Blue/Yellow/Black), H.D.G, Nickel, Chrome,PTFE,Dacromet,Geomet,Magni,Zinc Nickel,Zinteck. | | Packing | bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand | | Equipments | Caliper, Go&No-go gauge, Tensile test machine, Hardness tester, Salt spraying tester, H.D.G thickness tester, 3D detector, Projector, Magnetic flaw detecter | | Supply Ability | 1000 tons per month | | MinimumOrder | according to customer demand | | Trade Term | FOB/CIF/CFR/CNF/EXW/DDU/DDP | | Payment | T/T, L/C,West union,Paypal.etc | | Market | Europe/South&north Amrica/East&South east Asia/Middle East/Australia and ect. | | Professional | More than 10 years experience in fasteners industry Our Main market is North&South America and proficient in DIN/ASME/ASTM/IFI standard. | | Our advantage | One-stop shopping; High quality; Competitive price; Timely delivery; Technical support; Supply Material and Test Reports; Samples for free | | Notice | Please lets know the Size, quantity, Material or Grade, surface, If it is special and Non-standard products, please supply the Drawing or Photos or Samples to us | | All our processes strictly adhere to ISO9001 | 2008 procedures. We have strict quality control from producing to delivery.Our company had strong technology support, We have cultivated a group of managers who are familiar with product quality , good at modern concept of management. | | Standard parts | 7-15days | | Non-standard parts | 15-25days | | Category | [Assortment Kits & Mixed Fastener Sets](https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/) | ## Technical parameters | Standard: | ASME/ANSI B 18.2.1,IFI149,DIN931,DIN933,DIN558, DIN601,DIN960, DIN961, ISO4014,ISO4017 | | --- | --- | | Diameter: | 1/4"-2 1/2",M4-M64 | | Length: | ≤800mm or 30" | | Material: | Carbon Steel, Alloy Steel, Stainless Steel, Brass | | Grade: | SAE J429 Gr.2, 5,8; ASTM A307Gr.A, Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9;A2-70,A4-70,A4-80 | | Thread: | M,UNC,UNF | | Finish: | Plain,Black oxide, Zinc Plated(Clear/Blue/Yellow/Black), H.D.G, Nickel, Chrome,PTFE,Dacromet,Geomet,Magni,Zinc Nickel,Zinteck. | | Packing: | bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand | | Application: | Structural Steel; Metal Buliding; Oil&Gas;Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating | | Equipments: | Caliper, Go&No-go gauge, Tensile test machine, Hardness tester, Salt spraying tester, H.D.G thickness tester, 3D detector, Projector, Magnetic flaw detecter | | Supply Ability: | 1000 tons per month | | MinimumOrder: | according to customer demand | | Trade Term: | FOB/CIF/CFR/CNF/EXW/DDU/DDP | | Payment: | T/T, L/C,West union,Paypal.etc | | Market: | Europe/South&north Amrica/East&South east Asia/Middle East/Australia and ect. | | Professional: | More than 10 years experience in fasteners industry Our Main market is North&South America and proficient in DIN/ASME/ASTM/IFI standard. | | Our advantage: | One-stop shopping; High quality; Competitive price; Timely delivery; Technical support; Supply Material and Test Reports; Samples for free | | Notice: | Please lets know the Size, quantity, Material or Grade, surface, If it is special and Non-standard products, please supply the Drawing or Photos or Samples to us | ## Description Sems with Lock Washer Curved Spring Washers for Screw Assemblies is part of our assortment kits & mixed fastener sets range (Fastener Sets & Assemblies). ### Key details - **Type:** Round Head - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Material:** Carbon Steel - **Grade:** 4.8 - **Diameter:** 1/4"-2 1/2",M4-M64 - **Thread:** M,UNC,UNF - **Length:** ≤800mm or 30" - **Head Style:** Socket Head Available configurations include material, head style, standard, grade and package size. 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$0.012 – 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 Sems with Lock Washer Curved Spring Washers for Screw Assemblies? The listed minimum order is 1,000 pieces, at US$0.012 – 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 Sems with Lock Washer Curved Spring Washers for Screw Assemblies? Type: Round Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Carbon Steel; Grade: 4.8; Diameter: 1/4"-2 1/2",M4-M64; Thread: M,UNC,UNF. 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 package size. 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 assortment kits & mixed fastener sets are available? The Assortment Kits & Mixed Fastener Sets category lists 3,161 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/](https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/) 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 Assortment Kits & Mixed Fastener Sets →](https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/) [![Black Large Flange Blind Rivet, Aluminum+Stainless Steel, Flange Diameter 5/8″ (16mm) , Pop Rivet Assortment Kit Blind Rivet, 3/16″ X 5/8″, Grip Range (12-16mm)](https://img.engineeringhardware.com/Black-Large-Flange-Blind-Rivet-Aluminum-Stainless-Steel-Flange-Diameter-5-8-16mm-Pop-Rivet-Assortment-Kit-Blind-Rivet-3-16-X-5-8-Grip-Range-12-16mm.webp)](https://engineeringhardware.com/product/black-large-flange-blind-rivet-aluminum-stainless-steel-flange-diameter-5-8-16mm-pop/) Assortment Kits & Mixed Fastener Sets ### [Black Large Flange Blind Rivet, Aluminum+Stainless Steel, Flange Diameter 5/8″ (16mm) , Pop Rivet Assortment Kit Blind Rivet, 3/16″ X 5/8″, Grip Range 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