Graco 101926 Nut Lock
$26.90
In Stock
Graco 101926 Nut, Lock is a genuine OEM hardware part designed to secure components under vibration and maintain tight assembly in spray equipment.
- Thread size: 1/2-20 NF (fine thread)
- Used on Hydra-Cat and 8900 Proportioner series
- Prevents loosening under high-pressure operation
- Durable and reliable Graco OEM construction
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About the Graco 101926 Nut, Lock (1/2-20 NF)
Genuine Graco hardware lock nut for securing pump and proportioner assemblies under vibration.
Compatible Machines
- Graco 8900 Proportioner series — parts lists call out 101926 as “LOCKNUT; 1/2-20 NF”.
- Graco Hydra-Cat Proportioners (various fixed-ratio / President / King Hydra-Cat models) — manuals list 101926 “NUT, lock; 1/2-20 (nylon insert)”.
- Graco Bulldog / High-Volume Plural Component Pump assemblies — used on tie-rod/yoke connections where a 1/2-20 lock nut is specified.
- Other Graco pump, frame, and manifold assemblies that specify 101926 or a 1/2-20 NF lock nut in the OEM parts diagram (verify per model).
Key Features
- OEM fit: Genuine Graco part 101926 for precise fit and reliable torque retention.
- Locking design: Helps prevent loosening under vibration on high-pressure sprayer systems.
- Service-friendly: Common hardware across multiple Hydra-Cat and proportioner platforms.
Technical Specifications
| Part Number | 101926 |
|---|---|
| Description | Nut, Lock (lock nut) |
| Thread Size | 1/2-20 NF (some manuals note nylon insert) |
| Typical Locations | Displacement pump tie-rod/yoke interfaces, frame/plate mounts, manifold brackets (per model) |
| Compatibility Note | Use wherever the OEM diagram lists 101926 or a 1/2-20 lock nut; confirm per specific sprayer model. |
| Brand | Graco (OEM) |
Installation Tips
- Follow your machine’s service manual for torque specs and sequence.
- Inspect mating threads; replace if damaged or if locking feature shows wear.
- When noted by the OEM, apply thread lubricant or thread locker as specified.
Frequently Asked Questions
The OEM description lists it as 1/2-20 NF (fine thread). Some Hydra-Cat manuals note a nylon-insert version.
Confirmed usage on Graco 8900 Proportioner and multiple Hydra-Cat Proportioners (fixed-ratio, President/King variants). It also appears in plural-component pump assemblies. Always verify against your model’s parts list.
It’s a hardware fastener, not a typical wear item. Replace if threads are damaged or if the locking feature no longer holds torque.
Several Hydra-Cat manuals describe 101926 as “1/2-20 UNF with nylon insert.” Check your model diagram to confirm the exact callout.
Torque values vary by assembly (tie-plate/yoke vs. frame mount). Always use the torque spec from your machine’s OEM manual.
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