M8

• Overview
• Product Description
• Specification
• Mainly Product
• Packing & Delivery
• Certifications
• Company Profile
• FAQ

Overview

Basic Info.

Model NO.	Slotted Nut/Castle Nut
Connection	Common Bolt
Head Style	Hexagonal
Standard	DIN, ANSI, GB, JIS, GOST, BSW, ISO
Grade	4.8 5.6 6.8 8.8 10.9 12.9
Certification	ISO9001 CE
Delivery	20-30 Days
Finish	Plain , Zinc Plated or Customized
Packag Color	Customizable
Thread Standard	Unc/Unf/Unef/Uns/Bsw/Bsf/Metric Coarse/Metric Fine
Custom Order	Customization by Drawing/Sample
Price Terms	Fob/CFR/CIF/DDP/DAP
ODM/OEM	Available
Service	Custom-Made Service
Size Standard	Metric
Material Test Certificate	Have
Sample	Samples in Stock Are Free with Freight Collect
Color	Silver
Quality Control	100% Quality Inspection
Application	Connection,Fastening
Transport Package	Bulk Pack Small Boxed
Specification	M8-M48
Trademark	Qewitco
Origin	China
HS Code	731816
Production Capacity	10000ton/Year

Packaging & Delivery

Package Size25.00cm * 25.00cm * 19.00cm Package Gross Weight25.000kg

Product Description

Product Description

Model NO.	Hexagon Castle Nut
Standard	DIN935 DIN937
Size	M8-M48 standard & non-standard, spport customized.
Grade	Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 and etc.
Finish	Zinc Plated(Clear/Blue/Yellow/Black), Nickel, Chrome, according to your requirement.
Material	Carbon Steel, Alloy Steel, Stainless Steel, Brass. Aluminum or as your requirements.
Packaging	Customized

ApplicationsHexagon Castle Nuts (also known as slotted nuts or castellated nuts) are widely used in mechanical connections requiring anti-loosening and vibration resistance. Key industries include:Automotive Industry: Used in wheel bearings, transmission systems, suspension components, and other critical parts to prevent loosening under high-speed conditions.Construction Machinery: Ideal for excavators, cranes, agricultural equipment, and other heavy machinery, ensuring stability in high-vibration environments.Rail Transportation: Fastening systems for high-speed rail and subway tracks, ensuring long-term safety.Power Equipment: Transformers, power towers, and other electrical installations requiring secure fastening.Aerospace: Aircraft landing gear, engine components, and other high-safety applications.General Industry: Automation equipment, pumps, valves, steel structures, and other scenarios requiring reliable locking.Specification

Our Advantage1,High-Strength Anti-Loosening DesignTop slot design allows for cotter pins or wire locking, effectively preventing loosening under vibration—more secure than standard nuts.2,Diverse Materials & Strength GradesMaterials: Carbon steel, alloy steel, stainless steel (304/316), brass, aluminum, etc., meeting various environmental needs (corrosion resistance, high-temperature resistance).Strength Grades: Class 4.8 to 12.9, covering standard to ultra-high-strength applications.3,Customization ServicesSupports non-standard sizes (M8-M48 and larger), special threads, and surface treatments (zinc plating, nickel plating, Dacromet, etc.) to meet unique requirements.4,International Standards ComplianceConforms to DIN935/DIN937 and other global standards, ensuring reliability for export and high-end machinery.5,Multiple Surface FinishesZinc plating (clear/blue/yellow/black), nickel plating, chrome plating, and more for both corrosion resistance and aesthetics.6,Harsh Environment AdaptabilityStainless steel resists corrosion, alloy steel handles high pressure—suitable for humid, high-temperature, and chemically aggressive environments.

Why Choose Us?Factory Direct: Competitive pricing, support for small trial orders and bulk customization.
Strict QC: 100% full inspection ensures every nut meets standards.
Fast Delivery: Standard products in stock, short lead times for custom orders.
Technical Support: Provides selection guidance, anti-loosening solutions, and value-added services.Mainly Product

Packing & Delivery

Certifications

Company Profile

Qewitco – Your Trusted Global Supplier of Industrial Fasteners & Hardware ComponentsQewitco, based in Qingdao, China, is a premier global provider of industrial fasteners and hardware solutions. Founded in 2004, the company has earned a trusted reputation by combining China's manufacturing prowess with global business practices. Serving clients in Europe and beyond, Qewitco delivers cost-efficient, high-quality products tailored for sectors like construction, automotive, and infrastructure, ensuring a seamless procurement experience. By partnering directly with certified factories in China, Qewitco cuts out intermediaries, offering customers factory-direct prices and superior quality control. The company supplies an extensive selection of fasteners, including screws, bolts, nuts, and washers, compliant with international standards like DIN, ISO, and ANSI. Custom solutions are also available, with flexible order quantities and shorter production cycles to meet diverse project demands. Customer-centric service is at the heart of Qewitco's operations. Each client receives dedicated support from a personal account manager, guiding them from inquiry to delivery. The team prioritizes rapid, clear communication, addressing technical and logistical inquiries around the clock. Additionally, Qewitco provides tailored material advice, custom packaging, and just-in-time delivery to optimize supply chain efficiency for every project.FAQQ: What types of materials do you offer for fasteners?
A: We provide fasteners in various materials, including carbon steel, stainless steel, titanium alloy, copper, and more.Q: What payment methods do you accept?
A: We accept multiple payment methods, such as T/T (Telegraphic Transfer), L/C (Letter of Credit), PayPal, and others.Q: Do you offer OEM services or custom branding (logo printing)?
A: Yes, we support OEM services and can print your brand logo on the products.Q: Does the quoted price include shipping and taxes?
A: The quoted price depends on the trade terms (e.g., FOB, CIF, EXW). Shipping and tax costs will be specified accordingly.Q: What packaging options are available?
A: We offer various packaging options, including bulk, boxed, coiled, and custom packaging upon request.