SUNEX Tools 3/8 in. Drive 21mm 6-Point Universal Impact Socket, CR-MO Steel, Model 321UM

The SUNEX Tools 3/8 in. Drive 21mm 6-Point Universal Impact Socket, Model 321UM, is engineered for professional and industrial applications requiring reliable torque transfer. Constructed from high-strength chrome molybdenum alloy steel, this impact socket is designed to withstand the demands of high-torque impact use while maintaining durability. Its six-point geometry ensures maximum contact with fastener flats, reducing the risk of rounding and providing a precise fit that minimizes slippage during use. The socket features a black phosphate finish that offers excellent corrosion resistance, extending its service life even in challenging environments. Laser-etched dual size markings enhance visibility for quick identification, including in low-light conditions. Designed specifically for use with impact wrenches and pneumatic tools, this socket meets or exceeds ANSI and ASME standards for impact sockets, ensuring dependable and safe performance. Backed by the SUNEX Tools lifetime warranty with no exclusions, this socket provides long-term reliability for demanding tasks.

• Premium Impact Socket: 3/8 in. drive 21mm 6-point universal impact socket for professional and industrial applications
• 6-Point Design: Six-point geometry provides maximum contact with fastener flats, reducing rounding and delivering superior torque transfer
• CR-MO Alloy Steel: Constructed from high-strength chrome molybdenum alloy steel for maximum durability under high-torque impact use
• Impact Rated: Designed specifically for use with impact wrenches and pneumatic tools
• Lifetime Warranty: Backed by SUNEX Tools lifetime warranty with no exclusions
• Precision Fit: Machined to exacting tolerances for secure fastener engagement and reduced slippage
• Dual Size Markings: Features high-visibility laser-etched markings for quick identification even in low-light conditions
• Black Phosphate Finish: Industrial black phosphate coating provides excellent corrosion resistance for long service life
• Performance & Safety: Designed and manufactured to meet or exceed ANSI and ASME standards for impact sockets ensuring reliable, safe performance