Jonnesway impact spline socket 1/2" drive M16 x 100 mm long (S16A4516)

Jonnesway impact spline socket 1/2" drive M16 x 100 mm long (S16A4516) is a long spline socket designed for use with 1/2" drive impact wrenches and pneumatic tools. It is sized for M16 spline-head fasteners and extends 100 mm in length to reach recessed or deep-set bolts and studs. The socket is intended for professional maintenance and repair applications where high torque transmission and resistance to impact forces are required.

Advantages

The long design provides extended reach to access fasteners located in deep or narrow recesses without the need for extensions. The spline profile distributes torque across multiple contact points on the fastener head, reducing the risk of rounding or cam-out when used with impact tools. Built for impact use, the socket is manufactured to withstand repeated high-torque pulses from pneumatic or electric impact wrenches while maintaining dimensional accuracy and fit.

Suitable for

• Automotive repair and maintenance of engines, transmissions and driveline components
• Industrial equipment servicing where fasteners are recessed or obstructed
• Workshop tasks requiring frequent use of impact wrenches on spline-head bolts and studs

Key specifications

• Drive size: 1/2" (square drive)
• Spline socket size: fits M16 spline-head fasteners
• Overall length: 100 mm
• Material: impact-rated alloy steel (heat-treated)
• Profile: spline (multi-tooth) contact geometry for torque distribution
• Compatibility: designed for use with impact wrenches and pneumatic tools

How to use

Select the M16 spline socket and attach it securely to a 1/2" drive impact wrench or suitable adaptor. Position the socket squarely onto the spline-head fastener to ensure full engagement of the spline profile. Apply controlled impact torque increments, maintaining steady alignment to avoid slipping. After loosening or tightening, inspect the socket and fastener for wear or damage; replace the socket if deformation or cracks are visible.

Usage recommendations

Use with appropriate personal protective equipment, such as eye and hand protection. Avoid using the socket with non-impact hand tools unless explicitly rated for such use, and do not modify the socket. Store in a dry, organized toolbox to prevent corrosion and maintain fit accuracy.