M8 x 20mm Full Thread Small Diameter Socket Cap Head Screws - Stainless Steel (A2-70) Description
The M8 x 20mm Full Thread Small Diameter Socket Cap Head Screws - Stainless Steel (A2-70) has the following features:
- Effective Cross-Sectional Area of Thread: 36.6 mm²
- Natural Finish
- Full Thread
- Head Diameter (D): 11 mm
- Head Height (H): 7.5 mm
- Length (L): 20 mm
- Manufacturing Standard: Not Standardised
- Stainless Steel - High Tensile (A2-70)
- Stainless Steel Material Family
- Socket Size (J): 6 mm
- System of Measurement: Metric
- Thread Pitch: 1.25 mm
- Thread Size: M8 (8 mm)
- Thread Specification: Coarse
Discover more about the Small-Diameter Socket Cap Head Screws range.
Small-diameter socket cap head screws are precision-engineered fasteners designed for high-performance applications where space is limited. Featuring a distinctively compact cylindrical head design, these components are a specialised variant of the standard socket head cap screw, specifically modified to offer a reduced head diameter.
Like their counterparts, they feature an internal hexagonal drive, enabling high-torque installation with a standard Allen key or hex bit, ensuring a secure, reliable fix even in micro precision assemblies.
How Small-Diameter Head Cap Screws Work
Small-diameter socket cap head screws function by providing the high tensile strength of a traditional cap screw while occupying significantly less radial space. The reduced head diameter is the primary benefit, making them indispensable for modern, compact engineering where every millimetre matters.
By using a smaller head, engineers can position fasteners closer to the edges of a component or near other internal parts without risk of interference. In the manufacturing of compact electronic housings or high-end camera bodies, internal space is extremely limited. Using a small head diameter socket head cap screw allows the designer to maintain a robust mechanical connection while keeping the overall assembly slim and lightweight.
Materials Small-Diameter Socket Cap Head Screws Are Made From
To ensure these components meet the rigorous demands of modern industry, Accu’s range is available in several high-grade engineering materials:
- Stainless Steel - High Tensile (A2-70): The industry standard for general-purpose use, providing a balance of strength and excellent resistance to oxidation.
- Stainless Steel - Marine High Tensile (A4-70): Offers exceptional corrosion resistance, making it the primary choice for marine environments or chemical processing applications.
- Titanium (Grade 2): Ideal for aerospace and medical applications where a high strength-to-weight ratio and biocompatibility are critical.
- Steel - High Tensile (12.9): Specifically designed for heavy-duty mechanical applications requiring maximum yield strength.
Sizes and Types of Small Head Socket Cap Screws Available
Accu provides a comprehensive range of small-diameter socket head cap screws to support your project from prototyping to full-scale production.
Our selection includes metric thread sizes ranging from M2 (2 mm) for delicate precision work up to M10 (10 mm) for more robust requirements.
Lengths are available from 5 mm to 40 mm, ensuring suitability for various material thicknesses. The critical head diameters range from a minuscule 3 mm to 13.5 mm, allowing for seamless integration into compact counterbores.
Please note, all small head cap screws in this range are fully threaded, providing maximum engagement even in shallow tapped holes.
FAQs
Q: What is the difference between socket head cap screws with a small head compared to the standard version?
A: The primary difference lies in the outer diameter of the head. While the thread size and internal hex drive remain the same to ensure tool compatibility, the head of a small-diameter socket cap screw is machined down to a narrower profile to fit into restricted spaces.
Q: Are these reduced-head diameter socket head cap screws compatible with standard hex keys and drive bits?
Yes. Despite the precision-engineered reduction in external head diameter, the internal hexagonal socket drive remains standard.
Q: Do reduced-head socket cap screws offer the same tensile strength as standard versions?
No, the reduced head volume will slightly alter the load distribution compared to a standard head due to the reduced cross sectional area.
Q: Can I get 3D CAD models to check the clearances in my design?
Absolutely. We aim to make engineering faster and more accessible by providing 3D CAD models for download directly from the specific small diameter head socket head cap screw product page.
