Home » Valve Stem Locknut (3-pack), ASM 400 Gun

ASM 4425 Replacement Valve Stem Locknut: ASM 400 Gun (3-Pack)

SKU: 55-2226
In stock
Replacement for: ASM 4425, H.E.R.O 10-55-4425
$3.98
Sale $7.96 $3.98
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The Bedford 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. Compatible ASM equipment models are listed in the Compatible Equipment section below, where available.

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