Grand Brass Lamp Parts, LLCStaff Answer
Jul 20, 2026 - 06:09 AM
The outside diameter of this felt washer is 1 inch, and the inside diameter is 1/8 IPS slip, which measures approximately 3/8 inch.
For a better understanding of lamp thread sizes and 1/8 IPS dimensions, please refer to our Lamp Thread Size Chart:
https://grandbrass.zendesk.com/hc/en-...
