Graco 115322 4mm External Lock Washer
$3.50
In Stock
The Graco 115322 External Lock Washer 4 mm is a small but critical OEM‑specified washer used to lock bolts and screws securely — ensuring that assemblies in Graco spray or pump equipment stay tight and resist loosening under vibration or stress.
- External‑tooth lock washer — bites into bolt head/nut and surface for secure hold
- Used with 4 mm bolts/screws in Graco equipment
- Prevents loosening due to vibration or motion — maintains assembly integrity
- Essential for maintenance or rebuilds to ensure safe, reliable bolted joints
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
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About the Graco 115322 4 mm External Lock Washer
The Graco 115322 External Lock Washer is an OEM-specified 4 mm external-tooth lock washer — designed to work with screws or bolts in Graco spray, pump and fluid-handling equipment to prevent loosening under vibration or load.
When & Where to Use
- Bolted joints and assemblies in Graco spray/pump systems where vibration or motion could loosen fasteners
- Frame, housing, component or bracket bolts in pumps, sprayers or coating machines requiring secure fastening
- Replacement or maintenance — when original lock-washer is missing, worn out, stripped or damaged
- Any application using 4 mm screws/bolts where extra locking security is needed
Product Details
| Part Number | 115322 |
|---|---|
| Type | External-Tooth Lock Washer (4 mm) |
| Function | Prevents nuts/bolts from loosening — locks fastener in place via teeth grip and spring tension |
| Typical Use | Spray, pump or fluid-handling equipment; any bolted joint subject to vibration or stress |
| OEM Status | Original Graco part — ensures correct size, fitment and compatibility for Graco assemblies |
Why Use This Lock Washer?
- Prevents loosening of bolts/screws due to vibration, pressure pulsation or repeated use
- Provides better grip than flat washer or plain nut — external teeth bite both fastener and surface for secure lock
- Uses correct 4 mm specification to match Graco bolts/fasteners — ensures proper fit and safe assembly
- Recommended for maintenance, repair, or rebuilds to restore secure connections and avoid failures under load
Frequently Asked Questions
External-tooth lock washer’s teeth dig into both the fastener head (or nut) and the mating surface — giving stronger locking and preventing screws/bolts from loosening when equipment vibrates or moves.
You could — but plain washers don’t resist loosening under vibration or motion. External-tooth lock washers like 115322 provide better locking security for dynamic or load-bearing assemblies.
Replace if teeth are worn, flattened or if bolt/nut loosens frequently — worn lock washers lose their locking action and can compromise joint integrity.
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