A Misc Hardware FWSS-SAE-1/4 Washer distributes load at fastening points to keep connected components secure within the setup.
The washer distributes the load of a 1/4-inch fastener across a broader surface to support secure mounting and alignment in heating and cooling equipment. Its flat construction and 9/32-inch inside diameter matter because they provide proper fit, reduce surface wear around the connection point and promote more stable fastening under vibration.
The washer may need to be replaced if the HVAC system develops loose mounting points, shifting components, vibration-related noise or uneven clamping around a 1/4-inch fastener. Common indicators include visible bending, cracking, corrosion, thinning from wear or rust caused by moisture exposure and you might notice that hardware can no longer stay evenly tightened.
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Parts Town lets you return most new, unopened real OEM heating and cooling replacement parts within 90 days of delivery, so check our Returns page to see if your purchase qualifies. For orders fulfilled by a third-party seller, you'll need to follow their own policy.