Grand Brass Lamp Parts, LLCStaff Answer
Oct 22, 2026 - 07:25 AM
Thank you for reaching out to Grand Brass Lamp Parts!
No, this 4in Long x 1/2 IPS Fully Threaded Steel Nipple (SKU: NI40X12) uses NPS (National Pipe Straight) threads, not NPT (National Pipe Taper) threads.
While NPS and NPT threads share the same nominal diameter and thread pitch, the primary difference is:
- NPS (National Pipe Straight): Features straight, parallel threads commonly used in lighting fixtures and lamp hardware.
- NPT (National Pipe Taper): Features tapered threads designed to create a tighter connection as they are threaded together, commonly used in plumbing and piping applications.
This nipple has 1/2 IPS / NPS straight threads with an approximate outside diameter of 3/4 inch and is intended for compatible lamp and lighting fixture components.
For additional information about lamp threading and dimensions, please refer to our Thread Size Chart.
