

The Graco 157974 Plain Washer is a genuine OEM hardware component designed to secure and align components in fluid-handling and spray equipment assemblies.
The Graco 157974 Plain Washer is an OEM hardware component used in various Graco equipment assemblies. This flat washer ensures secure fastening, alignment, and reliable operation of piston, valve, and fluid-handling assemblies.
This washer is used in multiple Graco machines. Always verify your machine’s serial number and parts diagram before purchasing.
| Machine Model | Category | Application |
|---|---|---|
| Graco Reactor H-25 | Spray Foam / Adhesive | Fluid Section / Piston Assembly |
| Graco Reactor H-40 | Spray Foam / Adhesive | Fluid Section / Piston Assembly |
| Graco Reactor H-XP2 | Spray Foam / Adhesive | Fluid Section / Piston Assembly |
| Graco Piston Transfer Pump | Industrial Pump | Fluid Transfer / Fastening Hardware |
| Graco Industrial Fluid Modules | Industrial Pump | Piston-Valve Assembly / Hardware |
| Specification | Details |
|---|---|
| Part Number | 157974 |
| Type | Plain Washer |
| Function | Fastening, alignment, and securing components |
| Application | Spray foam, adhesive, industrial fluid-handling machines |
| Compatibility | Verify with machine parts breakdown and serial number |