The GRACO 557402 is a zinc-coated hex nut designed for use with blowout fittings featuring 11/16" disks. It features a 1/4 inch (6.35 mm) orifice and is intended to secure and regulate flow in GRACO lubrication and maintenance equipment.
Key Features:
Hex Nut
557402
Zinc-coated steel
Blowout fittings with 11/16" disks
Durable zinc coating for corrosion resistance
Standard hex nut design for easy installation and removal
Precision 1/4 inch orifice for controlled flow
Applications: Used in GRACO lubrication and maintenance systems for securing and regulating flow in blowout fittings with 11/16" disks.
Installation Notes:
Using genuine GRACO parts ensures proper fit, function, and reliability within GRACO equipment.
Ensure threads are clean and undamaged before installation
Hand-tighten the nut before final torque to avoid cross-threading
Inspect for leaks after installation and during routine maintenance
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