The Ring Doorbell (1st gen) holds its low-voltage doorbell wires under M3 x 4mm terminal screws. A stripped or lost terminal screw lets the wire pull free, which cuts power to the doorbell. We stock exact-size replacements in black oxide carbon steel.
| Device / location | Screw | Buy |
|---|---|---|
| Ring Doorbell (1st gen) wiring terminals | M3 x 4mm Phillips flat head | 10-pack, $4.99 · singles |
Before you start: doorbells run on low-voltage wiring from a transformer. Turn the doorbell circuit off at the breaker before you loosen terminal screws.
How to check the size in 30 seconds
- Thread: M3 means the threaded shank is 3 mm across; M2.5 is 2.5 mm. They look alike, so hold the old screw against a ruler or use calipers.
- Length: measure from under the head to the tip.
- Head: our smart-home screws are Phillips flat head (low profile), black oxide carbon steel.
Not sure? Send us a photo of the screw next to a ruler and your device model before you order.
Other Ring models
Terminal screws differ between Ring generations and models, and this page only lists the Ring Doorbell (1st gen) screw we have matched. For the faceplate security screw and wall screws by model, see our Ring doorbell screw size guide. If your Ring is a different model, compare the screw you removed before ordering.
Related smart-home screws
- Google Nest Doorbell terminal screws (M3 x 4mm)
- Eufy HomeBase 3 and Eufy camera screws
- Smart lock keypad battery cover screw
- All smart-home and security device screws
Singles: single screws are $0.10 each and the cart needs at least $4.99 per line, so singles are added 50 at a time ($5.00). For one doorbell, the 10-pack is usually the simpler choice.
Shipping and returns: free US shipping on orders of $25 or more; orders ship within 24 hours (Mon–Sat) from South Carolina with tracking, and US delivery takes 1–5 business days after dispatch. 30-day returns.
FAQ
What size are Ring Doorbell terminal screws?
The Ring Doorbell (1st gen) terminal screws are M3 x 4mm Phillips flat head. Other Ring models may use a different screw, so compare yours first.
Do I need to turn the power off?
Yes. Turn off the doorbell circuit at the breaker before loosening or replacing terminal screws.