RUKO FLS-DIN373-Fina-M-22-MK3 parafuso de cabeça escareada M22 x 30 mm aço 10.9 sextavado interior

This RUKO countersunk screw with pilot recess stands out for its precision-machined hex socket drive and M22 coarse thread, delivering a secure, flush fit in demanding mechanical assemblies. Unlike standard fasteners, the pilot recess ensures accurate centering, making it ideal for high-strength applications where alignment is critical.

Highlights

• Countersunk head with pilot recess for precise, flush seating
• Hexagon socket drive (17 mm) for reliable torque transfer
• High-strength steel, class 10.9, with black oxide finish
• Full metric coarse thread M22 x 2.5 mm, 30 mm length

In daily use

Engineered for securing components that require a recessed or flush head, this screw excels in machinery, fixtures, and structural connections. The pilot recess aids in alignment during installation, while the hex socket allows for controlled tightening. The plain black oxide surface offers minimal corrosion resistance, so additional protection is recommended in harsh environments.

Full specifications

• Screw standard: DIN 373
• Thread type: Metric coarse thread
• Nominal thread diameter (d): M22
• Thread pitch (P): 2.5 mm
• Screw length (l): 30 mm
• Head type: Countersunk head with pilot recess
• Pilot recess diameter (d1): 22 mm
• Head diameter (dk): 34 mm
• Head height (k): 13 mm
• Drive type: Hexagon socket
• Hexagon socket size (s): 17 mm
• Material: Steel
• Strength class: 10.9
• Surface finish: Plain (black oxide)
• Thread length: Full thread
• Application: For securing components with flush or recessed head requirements
• Corrosion resistance: Low (plain finish requires additional protection)

Final note

A robust fastener for high-torque applications, built to DIN 373 standards with a focus on precise alignment and flush mounting.