Aftermarket GRACO® 4425 Locknut, rear block (Non-OEM)

Manufacturer: Total Finishing Supplies

Part Number: 13275

Comparable OEM Part Number: 4425

Description: Total Finishing's part # 55-2226 is a direct-fit replacement for the ASM 4425 valve stem locknut, supplied as a 3-pack for ASM 400 series spray guns and also referenced as H.E.R.O 10-55-4425. The locknut holds the gun's valve stem adjustment in position, and because it comes off during most gun repacking jobs, technicians typically keep spares on hand.

Common reasons for replacement:

• Locknut loosening and letting the valve stem adjustment drift
• Rounded flats from repeated service with worn wrenches
• Lost hardware during gun teardown or repacking
• Stocking spares for scheduled spray gun maintenance

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

Comparable to GRACO® 4425