Products Description
Double Hexagonal Studs, also known as double-ended studs and double-ended threaded bars, are high-reliability double-threaded fastening studs manufactured strictly to DIN938 / DIN939 international standards. Designed with complete continuous threads on both ends for bidirectional locking connection, they serve as core connecting fasteners for assembling thick components, flanges, equipment bases and heavy mechanical structures. Featuring multi-grade strength options, diverse anti-corrosion surface treatments and full-size coverage, these studs deliver stable clamping force, high tensile resistance and long-term structural fastening reliability for industrial machinery, construction, automotive and petrochemical equipment.
Complete Technical Specifications
| Parameter | Detailed Specification |
|---|---|
| Executive Standard | DIN938, DIN939 |
| Official Name | Double Hexagonal Studs |
| Alias | Double-ended studs, double-ended threaded bars |
| Raw Material | Carbon steel, alloy steel |
| Strength Grades | Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9 |
| Nominal Diameter Range | M2 – M48 |
| Thread Pitch | 0.4 – 5mm, standard coarse/fine thread customizable |
| Surface Treatment | ZP (Zinc Plated), YZ (Yellow Zinc Plated), BLACK (Black Oxide) |
Material & Grade Performance Breakdown
Material Selection
- Carbon Steel: Cost-effective basic material for light to medium static load assembly, ideal for general machinery, cabinet fixing and indoor conventional fastening.
- Alloy Steel: Quenched and tempered for enhanced tensile strength, shear resistance and fatigue resistance, applicable to heavy-load, high-vibration and high-temperature working environments.
Strength Grade Application Scenarios
- Grade 4.8 / 5.8: Economical low-to-medium strength, for light-load static connection, general mechanical assembly, non-vibration equipment fixing
- Grade 8.8: Universal medium-high strength, balanced toughness and tensile performance, widely used for standard mechanical flanges, pump and valve assembly
- Grade 10.9 / 12.9: Ultra-high strength heavy-duty grade, excellent anti-fatigue and anti-loosening capacity, for pressure vessels, engine components, bridge steel structures and high-load industrial equipment
Quality Control & Custom Service
Quality Control & Custom Service
Every batch undergoes raw material inspection, hardness testing, tensile load test, thread precision inspection and salt spray corrosion test to comply with DIN industrial safety standards. We support custom thread length, unequal thread ends, special pitch, logo marking and OEM packaging. Standard export packaging includes cartons, woven bags and wooden pallets with moisture-proof protection for global sea and land transportation. Small trial orders and bulk wholesale orders are both acceptable.
Send your inquiry for customized size, strength grade and bulk pricing support.
Hot Tags: double hex stud, China double hex stud manufacturers, suppliers, factory, Double Ended Bolt, Double Ended Threaded Bolt DIN938 DIN939, Double Hex Stud, M6 Double Ended Stud, stud bolt, Stud Bolt For Wheel
