Basic Product Information
- Product Name: DIN 912 Hexagon Socket Head Cap Screw (Grade 4.8), commonly known as a cup-head screw or hexagon socket screw
- Standards: German Industrial Standard DIN 912 (equivalent to International Standard ISO 4762 and Chinese National Standard GB/T 70.1)
- Strength Grade: Grade 4.8 (Standard carbon steel base grade, nominal tensile strength 400 MPa, yield strength 320 MPa)
- Material: High-quality medium- and low-carbon steel (Q235, 35# steel)
- Surface Treatment: Blackening (oxidation), zinc plating (blue-white zinc / colored zinc), hot-dip galvanizing, etc. (customizable)
- Product Features: Cylindrical head + internal hex socket; requires an internal hex wrench for installation
Core Advantages
Strictly compliant with the DIN 912 standard, these fasteners feature precise and uniform dimensions, threads, and drive slots, making them compatible with global equipment and assembly requirements. This ensures worry-free cross-border procurement and equipment maintenance.
The compact cylindrical head design fits into tight installation spaces. The internal hex socket engages precisely with wrenches, ensuring even torque transfer and preventing slippage, resulting in efficient and reliable installation.
Grade 4.8 offers the best value for money. Its mechanical properties meet the needs of most general applications, ensuring controllable costs and broad applicability. It is the mainstream standard fastener for mechanical equipment, instruments, furniture, and hardware assembly.
Covering the full range from M3 to M24, with complete length options and choices between full-thread and half-thread. We support both bulk stock and customized production.
Typical Applications
- Assembly of general machinery, machine tools, and automated equipment
- Fastening of electronic products, instruments, and home appliances
- Furniture assembly, hardware products, and metal frame connections
- Building decoration, rail transit, and vehicle maintenance
- Non-heavy-duty fastening applications requiring moderate strength and compact installation
Table of Common Dimensions for DIN 912 Grade 4.8
(1) Key Dimensional Parameters (Standard Values)
|
Thread Specifications d |
Pitch P (mm) |
Head diameter dk (max, mm) |
Head height k (max, mm) |
Hexagon socket side length s (mm) |
Hexagon socket depth t (min, mm) |
|
M3 |
0.5 |
5.5 |
3.0 |
2.5 |
1.6 |
|
M4 |
0.7 |
7.0 |
4.0 |
3.0 |
2.0 |
|
M5 |
0.8 |
8.5 |
5.0 |
4.0 |
2.5 |
|
M6 |
1.0 |
10.0 |
6.0 |
5.0 |
3.0 |
|
M8 |
1.25 |
13.0 |
8.0 |
6.0 |
4.0 |
|
M10 |
1.5 |
16.0 |
10.0 |
8.0 |
5.0 |
|
M12 |
1.75 |
18.0 |
12.0 |
10.0 |
6.0 |
|
M14 |
2.0 |
21.0 |
14.0 |
12.0 |
7.0 |
|
M16 |
2.0 |
24.0 |
16.0 |
14.0 |
8.0 |
|
M20 |
2.5 |
30.0 |
20.0 |
17.0 |
10.0 |
|
M24 |
3.0 |
36.0 |
24.0 |
19.0 |
12.0 |
(2) Common Length Series (mm)
- Standard lengths L: 6, 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 90, 100
- Length Notation: e.g., M8×30 (M8 thread, 30 mm length); lengths ≤ the shank length b are full-threaded, > b are half-threaded
Ordering and Packaging Instructions (Practical Information for Independent Sites)
- Ordering Format: Specification (DIN 912) + Thread Diameter + Length + Strength Grade + Surface Finish; Example: DIN 912 M8×30 Grade 4.8 Blackened
- Packaging Specifications: Small boxes (100/500 pcs), cartons (25 kg/box); neutral or branded packaging available
- Delivery Capacity: Standard specifications ship within 48 hours; custom orders within 7–15 days
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