S-92552A478 M8 x 25 mm DIN 653 Thumb Screws

Key Features & Benefits at a Glance

• Superior manual grip with 30mm knurled round head for tool-free operation in tight spaces
• Enhanced corrosion resistance through black-oxide steel construction for extended service life
• Reliable thread engagement with M8 coarse thread (1.25mm pitch) for quick installation and vibration resistance
• Optimized strength-to-weight ratio featuring 70,000 psi tensile strength and Rockwell B84 hardness
• Precision manufacturing with Class 6g thread fit ensuring consistent performance in metric applications
• Space-saving low-profile design with 6mm head height for clearance-critical assemblies
• Full regulatory compliance meeting DIN 653 standards and environmental regulations (RoHS 3/REACH)

Professional Applications & Engineering Value

This black-oxide steel thumb screw solves critical manual fastening challenges in industrial maintenance, electronic enclosures, and machinery access panels. The M8 coarse thread (1.25mm pitch) combined with fully threaded right-hand design enables rapid installation without specialized tools, while the knurled round head maintains secure grip even with lubricated hands or gloves. The low-profile configuration (6mm head height) prevents interference in compact assemblies, and the black-oxide surface treatment provides corrosion protection in humid environments. Engineered to DIN 653 specifications, these thumb screws deliver consistent performance in repetitive access applications where reliability and quick service access are paramount.

Specification Summary & Compliance

Manufactured to Class 6g thread tolerance with M8 x 1.25 mm coarse metric threading and 25mm fully threaded length. Complies with DIN 653 dimensional standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification available for black-oxide steel with documented 70,000 psi tensile strength and Rockwell B84 hardness verification.