S-92908A240 4.3 mm ID x 16 mm OD Finishing Washers

Key Features & Benefits at a Glance

• Perfect flush mounting with 90° countersink angle for seamless surface integration
• Enhanced corrosion resistance from black-oxide steel coating in harsh environments
• Superior load distribution with precise 4.3mm ID and 16mm OD dimensions
• Exceptional durability backed by Rockwell 15N80 hardness rating
• Reliable M4 screw compatibility for secure fastening in metric assemblies
• Industry compliance assurance meeting RoHS 3 and REACH environmental standards
• Consistent thickness control (2.7-3.3mm) for uniform pressure application

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these M4 metric countersunk washers solve critical flush-mounting challenges in machinery, automotive, and electronic enclosures. The black-oxide steel construction provides superior corrosion resistance where moisture or chemicals are present, while the precise 90° countersink angle ensures screw heads sit perfectly flush—eliminating protrusions that could interfere with moving parts or aesthetic requirements. With Rockwell 15N80 hardness, these washers maintain structural integrity under vibration and load stress, making them ideal for assembly lines, precision equipment, and structural frameworks where reliability is non-negotiable.

Specification Summary & Compliance

Manufactured to precise metric dimensions (4.3mm ID × 16mm OD) with controlled thickness tolerance (2.7-3.3mm) for consistent performance. The 90° countersink angle conforms to standard flush-mounting requirements while the black-oxide steel material ensures lasting protection. Full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) and REACH (EC 1907/2006) standards guarantees environmental responsibility and workplace safety.