Sunex 321MRD 21mm Deep Impact Socket, 3/8" Drive, Chrome-Molybdenum Steel

Sunex 321MRD 21mm Deep Impact Socket, 3/8" Drive, Chrome-Molybdenum Steel

• The Sunex 321MRD Semi-Deep Impact Socket features a 21 mm opening and a 3/8 inch drive, offering extra reach and durability for high-torque impact tool applications in automotive and industrial contexts.
• Features:
  • Forged from chrome-molybdenum (Cr-Mo) alloy steel for exceptional strength and long service life
  • Radius-corner design delivers improved engagement on fastener flats while reducing rounding and wear
  • Dual size marking using laser etching and permanent stamping ensures visibility and durability
  • Black phosphate finish offers superior corrosion resistance and easy surface maintenance
  • Engineered to meet or exceed ANSI and ASME performance and safety standards
  • Backed by Sunex’s lifetime warranty with no exclusions
• Specifications:
  • Manufacturer: Sunex Tools
  • Part Number: 321MRD
  • Socket Size: 21 mm
  • Drive Type: 3/8 inch square drive
  • Socket Configuration: 6-point, semi-deep impact socket
  • Quantity: Single socket
  • System Compatibility: Designed for use with 3/8 inch drive impact tools on metric fasteners
• Also known as: 21 mm semi-deep impact socket, Sunex 321MRD socket, Cr-Mo impact socket 21 mm, metric semi-deep impact socket, and radius-corner impact socket.

Sunex Tools delivers professional-grade impact sockets engineered for strength, precision, and reliability-combining Cr-Mo alloy steel construction, extended reach semi-deep design, and a lifetime warranty for demanding service environments.

Q: What drive size does the Sunex 321MRD utilize?
A: The Sunex 321MRD uses a 3/8 inch square drive, compatible with standard 3/8 inch impact tools.

Q: What benefit does the radius-corner design provide?
A: The radius-corner design grips the flat sides of fasteners to prevent rounding and extends both tool and fastener life.