The GRACO 161077 is a fitting, union, and straight adapter designed to connect different pipe sizes and types within GRACO equipment. It is commonly used as a swivel adapter to facilitate flexible connections between 1/2-inch NPT (female) and 3/8-inch NPS (female) threaded components. Material is not specified in available sources, but it is typically constructed from durable metals for industrial use. Its intended function is to provide a secure, leak-free connection in fluid transfer systems, such as lubrication or spray equipment. Key Features: Fitting, Union, Adapter, Straight 1/2-inch NPT(f) x 3/8-inch NPS(f) Compatible with GRACO equipment requiring 1/2-inch NPT(f) to 3/8-inch NPS(f) connections Swivel design for flexible installation Reliable, leak-free connection Ease of maintenance due to standard threading Applications:Used in fluid transfer systems such as lubrication, spray, and maintenance equipment where flexible or secure pipe connections are required. Installation Notes: Using genuine GRACO parts ensures compatibility, reliability, and optimal performance within GRACO systems. Ensure threads are clean and free of debris before installation Use appropriate thread sealant or tape for leak prevention Hand-tighten before final torque to avoid cross-threading Inspect regularly for leaks or wear and replace as needed