Nozzle Spout Latch Spring

Model ID: DY128

The DY128 Nozzle Spout Latch Spring is a precision-engineered tension component critical to the mechanical integrity and safety of automatic fuel nozzles. While often overlooked, the latch spring is the heart of the nozzle's "hold-open" and "automatic shut-off" logic. Its primary function is to provide the calibrated resistance required to keep the spout securely locked into the nozzle body while maintaining the exact tension necessary for the vacuum-sensing diaphragm to trip the shut-off mechanism when the tank is full. [Image showing the internal latch spring location within the nozzle handle assembly]

Manufactured from high-tensile 302/304 stainless steel, the DY128 is designed to withstand millions of cycles without "spring fatigue"—a condition that leads to nozzles failing to stay open or, more dangerously, failing to shut off automatically. To combat the harsh environment of a gas station, the spring is treated with a corrosion-resistant finish that prevents degradation from constant exposure to gasoline, diesel, and external moisture.  The DY128 features precision-ground ends to ensure an even distribution of force against the latch pin, preventing "side-loading" that can wear down the internal nozzle casting. For maintenance teams and nozzle rebuilders, the DY128 provides the OEM-spec tension required to restore factory-level performance and safety to used fueling equipment.