The QRP 4QRD1A0616 is a quick-release detent pin with a shoulder design, used for fast securing and positioning of components in mechanical assemblies. It is part of a precision pin family that uses a spring-loaded ball detent locking mechanism, allowing the pin to be inserted and removed without tools while still providing secure retention.

The “metric pins shoulder” configuration indicates that the pin includes a machined shoulder section, which provides a positive stop and improved load positioning in assemblies. The “CRES” designation refers to corrosion-resistant stainless steel (typically 300-series) construction, suitable for harsh environments. The “D” suffix typically denotes a detent-style locking configuration within the QRP pin series.

This type of pin is commonly used in aircraft maintenance fixtures, ground support equipment, jigs, and quick-assembly structures, where components must be frequently removed or adjusted while maintaining repeatable alignment.

Key features include:

QRP part number: 4QRD1A0616
Metric shoulder detent pin design
Stainless steel (CRES) construction
Spring-loaded ball detent locking mechanism
Quick-release operation (push to insert, pull to remove)
Shoulder design for positive positioning and load control
Suitable for repeated assembly/disassembly
Corrosion-resistant for aviation and industrial environments
Used in fixtures, tooling, and aircraft ground support equipment
High repeatability alignment pin system
Designed for metric hole applications