Thread Protection Design
The closed cap design completely covers the protruding bolt thread, protecting exposed threads from dust, moisture, impact, and corrosion while improving operational safety.
DIN 917 Hexagon Cap Nuts, Low Type
- Standard: DIN 917
- Material: Stainless Steel
- Thread Size: M5-M20
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
DIN 917 Hexagon Cap Nut (Low Type) is a low-profile hexagonal cap nut designed to provide thread protection, improved safety, and a clean finished appearance. Manufactured according to DIN standards, it features a closed dome-shaped top that covers the exposed bolt end, preventing damage, corrosion, and accidental contact with sharp threads.
It is widely used in automotive components, machinery, furniture, electrical equipment, and applications where both functional protection and appearance are important. DIN 917 specifies low type hexagon cap nuts with metric coarse and fine threads, mainly in product grade A.
Draw
Specification
DIN 917 vs DIN 1587 — Key Differences
DIN 917 (Low Type Cap Nut)
- Lower height design for compact assemblies and limited installation space.
- Provides basic thread protection and clean appearance.
- Suitable for applications where a low-profile finish is preferred.
DIN 1587 (High Type Dome Nut)
- Higher dome height provides greater thread coverage and protection.
- Offers better protection against impact, dirt, and corrosion.
- Commonly used where a more complete enclosed thread protection is required.
Core Difference:
DIN 917 focuses on compact size and low-profile protection, while DIN 1587 provides higher coverage and stronger thread protection.
Product Advantages
Low Profile Structure
Compared with standard high dome cap nuts such as DIN 1587, DIN 917 adopts a lower height design, making it suitable for applications with limited installation space where a compact appearance is required.
Clean & Safe Appearance
The smooth, rounded top eliminates sharp thread exposure, reducing the risk of injury and providing a more finished appearance for visible assemblies.
Common Questions
What is DIN 917 cap nut?
DIN 917 is a low type hexagon cap nut with a closed dome-shaped top designed to cover exposed bolt threads and provide protection and improved appearance.
Can DIN 917 nuts be reused?
Yes. Like standard nuts, DIN 917 cap nuts can generally be reused if the threads and dome structure remain undamaged.
Does DIN 917 provide locking function?
No. DIN 917 is mainly designed for thread protection and appearance. For vibration resistance, additional locking solutions such as thread lockers or lock washers may be required.
Can DIN 917 nuts be customized?
Yes. Manufacturers can provide customized materials, finishes, thread types, and special packaging according to customer requirements.
