The Graco 103975 Lock Washer is a genuine 3/8" stainless steel spring washer designed to keep fasteners secure under vibration and pressure. Ideal for maintaining reliability in professional paint and fluid-handling equipment.
Below are the verified assemblies/modules where the genuine Graco 103975 Lock Washer is called out in parts lists. Always match against your machine’s parts manual before ordering.
| Part Number | 103975 |
|---|---|
| Official Description | Washer, Lock (spring-type) |
| Nominal Size | 3/8 in |
| Material | Stainless Steel (SST) |
| Function | Helps prevent loosening of fasteners due to vibration/rotation in finishing & pumping equipment |
| Typical Use | Hardware component within Graco agitators, ram modules, and bulk evacuation systems |
| Question | Answer |
|---|---|
| Is 103975 used on handheld or contractor airless sprayers? | It can be used wherever a 3/8 in stainless Lock Washer is specified. Not all handheld/contractor sprayers call out this exact part number—verify against the specific model’s parts manual. |
| Can I substitute a plain/flat washer? | No. A plain washer does not provide the locking action needed to resist vibration; always use the specified Washer, Lock. |
| What material is it? | Stainless Steel (SST), suitable for use around fluids/cleanup environments where corrosion resistance is preferred. |
| How do I confirm compatibility? | Check your unit’s official parts list or BOM. If it calls out Graco 103975 (3/8 in SST spring lock washer), this is the correct replacement. |
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