GRACO O-RING, -236 BUNA-N 90 DURO - (SKU: 558691)The GRACO 558691 is an O ring made from BUNA N (Nitrile) material with a 90 durometer hardness. It is designed for use as a sealing component within GRACO lubrication and fluid handling equipment, providing reliable sealing against oils, fuels, and other compatible fluids. Key Features: O ring BUNA N (Nitrile) rubber, 90 durometer Compatible with oils, fuels, and other fluids suitable for BUNA N material High reliability for sealing applications

Heavy-duty construction for durability

particularly where leak prevention and pump reliability are critical

Used in GRACO spray or lubrication systems where height adjustment of components is required

5 thread specification ensures compatibility with standard industrial fittings

primarily to lower or maintain material viscosities and to heat true warm melt materials for applications such as sealing and bonding

Inspect guide rods and bushings for wear during installation

Regularly inspect bearing cartridges for signs of wear or damage

While specific material details for the enclosure plug are not specified in available documentation

Electric dispensing and transfer pump

Reliable for moisture sensitive

NPTF thread for secure

Used for maintenance and repair of GRACO Fireball 50:1 pumps in industrial lubrication and fluid transfer applications