Aftermarket GRACO® 178945 Lower Jam Nut, piston (Non-OEM)

Manufacturer: Total Finishing Supplies

Part Number: 536835

Comparable OEM Part Number: 178945

Description: Total Finishing's part # 19-2629 is a compatible replacement for GRACO® parts 178-945 and 178945 — the lower packing nut used in GRACO® spray equipment. The packing nut threads down on the packing stack to set its compression — it is the adjustment that keeps the throat sealing as packings wear, and on many pumps it doubles as the reservoir for throat seal liquid. Compatible with GRACO® EM 590, GRACO® Fuller OBrien Pro 701, GRACO® GM 3500, GRACO® LineLazer 3500, GRACO® LoPro 1000, GRACO® Super Nova 700 and other compatible equipment.

Common reasons for replacement:

• Packing compression no longer holding between adjustments
• Renewed during a full pump repack
• Stripped or galled threads from repeated adjustment
• Worn wrench flats after years of service

Manufactured to OEM-equivalent dimensions for proper fit and performance.

Comparable to GRACO® 178-945