DIN935 Slotted Castle Nut Specifications
Parameter | Details |
Product Name | DIN935-1-2013 Hex Slotted Castle Nut, Locking Castle Nut |
Standard | DIN935-1-2013 German Industrial Standard |
Structure | Hexagon body with slotted crown design, cotter pin locking structure, mechanical anti-loosening |
Grade | Precision Grade A, Standard Grade B; Carbon Steel 4.8/8, Stainless Steel A2-70/A4-80 |
Surface Finish | Zinc Plated, Black Oxide, Natural Stainless Steel Finish |
Thread Type | Metric Coarse Thread & Metric Fine Thread |
Size Range | M4-M100 Full Sizes In Stock, Custom Non-standard Sizes Available |
Core Function | Mechanical anti-loosening locking, vibration resistance, shaft and bearing fixing |
Application | Construction machinery, vehicle axle, vibrating equipment, heavy-duty industrial equipment |
Inspection | Dimensional test, thread gauge inspection, slot precision test, hardness & appearance inspection |
Package | Neutral Bag + Export Carton & Pallet, OEM Custom Packaging Available |
Lead Time | 3-7 Days for Stock Sizes, 15-20 Days for Custom & Special Sizes |
Product Core Advantages
Mechanical Rigid Anti-loosening
Equipped with crown slot structure for cotter pin matching, realizing rigid mechanical locking. It effectively solves the problem of nut loosening and falling off caused by long-term vibration and dynamic load, with more stable anti-loosening performance than ordinary self-locking nuts, suitable for harsh working conditions.
Dual A/B Precision Grades
Grade A with high precision and small tolerance for precision equipment assembly; Grade B with high cost performance for general heavy machinery. Dual-grade design meets the assembly requirements of different precision and scenarios.
Coarse & Fine Dual Threads
Support metric coarse and fine thread specifications. Coarse thread is convenient for quick assembly, while fine thread has higher locking precision and better anti-loosening effect, adapting to diverse working conditions such as general fastening and high-precision compression.
Complete Material & Finish Options
Carbon steel ensures high bearing capacity and hardness, while stainless steel provides excellent corrosion and rust resistance. Multiple surface treatments adapt to indoor, outdoor, humid and corrosive working environments, ensuring long-term stable use.
Grade Selection Guide
Grade 4.8 Zinc Plated Nut (Economical Type)
Made of high-quality low-carbon steel with zinc plating, cost-effective and rust-proof, suitable for general machinery, light equipment and conventional pin shaft locking.
Grade 8 High-strength Nut (Heavy-duty Type)
High-strength quenched and tempered carbon steel, high hardness and strong compression resistance, ideal for heavy machinery, vehicle axles and high-vibration equipment locking.
304 Stainless Steel Nut (General Anti-corrosion Type)
304 stainless steel with good rust and corrosion resistance, suitable for humid workshops, food machinery and outdoor conventional equipment assembly.
316 Stainless Steel Nut (High Anti-corrosion Type)
316 stainless steel with superior acid and salt spray resistance, applicable for chemical industry, marine equipment and harsh corrosive working environments.
DIN935 vs Ordinary Hex Nut Difference
DIN935 Slotted Castle Nut: Unique crown slotted structure supports cotter pin mechanical locking, professional for vibration and dynamic load working conditions. It has dual precision grades and dual thread specifications, with reliable active anti-loosening performance.
Ordinary Hex Nut: No locking slot and anti-loosening structure, relying only on thread friction for fastening. It is easy to loosen under vibration conditions and only applicable for static non-vibration general fastening scenarios.
Production Process
High-quality Raw Material Selection: Select high-purity carbon steel and stainless steel solid bars to ensure stable hardness and bearing capacity of nuts.
Integrated Cold Heading Forming: One-piece forming of hexagon body and crown slot with dense structure, uniform size and no structural defects.
Precision CNC Tapping: Standard coarse and fine threads with full gauge inspection to ensure tight meshing and no slipping during long-term use.
Precision Slot Cutting: Accurate slot processing with smooth wall and no burrs, ensuring perfect fit and locking of cotter pins.
Professional Anti-corrosion Treatment: Various surface treatments to adapt to different indoor and outdoor working environments.
Strict Grade Inspection: Classify and inspect according to Grade A/B precision standards to ensure consistent batch quality and stable precision.
Application Industries
Construction Machinery: Anti-loosening locking for pin shafts and bearings of excavators, cranes and loaders.
Automotive & Rail Transit: Fastening of vehicle axles, chassis parts and rail transit equipment accessories.
General Machinery: Locking of vibrating screens, conveying equipment and high-frequency operating modules.
Steel Structure Engineering: Positioning and anti-loosening fastening of heavy-duty equipment brackets and base parts.
Chemical & Food Machinery: Corrosion-resistant and anti-loosening assembly in humid and acid-base environments.
Marine & Outdoor Equipment: Weather-resistant fastening for outdoor open-air and marine supporting facilities.
Why Choose Our DIN935 Nuts
We specialize in mass production of DIN935-1-2013 hex slotted castle nuts with complete A/B precision grades, coarse/fine threads and material types. All products strictly comply with German industrial standards, with accurate slot size, standard thread and stable anti-loosening performance. Sufficient stock for large and special specifications, reliable batch quality and customizable non-standard sizes. We provide professional anti-loosening fastening solutions for global heavy industry, machinery and vehicle equipment.
For high-precision DIN935 slotted castle nuts, Grade A/B locking nuts and custom industrial fasteners, please feel free to contact us for professional technical support and exact quotation.
