> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# RJ-12 or RJ-11 Telephone Round Panel Mount Adapter Plug

**Type:** Product page · **SKU:** ADA5859 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/rj-12-or-rj-11-telephone-round-panel-mount-adapter-plug.html ([markdown](https://core-electronics.com.au/rj-12-or-rj-11-telephone-round-panel-mount-adapter-plug.html.md))

If you need to add a panel-mount connection for telephone-interfacing projects but don't have the time or ability to cut a custom oval or square hole, this **RJ-12 or RJ-11 Telephone Round Panel Mount Plug** is the easiest and fastest way to panel-ify your existing phone kit.

## Pricing

- **Price:** $10.60 (inc GST) — $9.64 AUD, exc GST
- **Quantity discounts:** 10+ $9.35 (exc GST) · 50+ $9.15 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 07 and Sep 09.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA5859:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA5859:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

If you need to add a panel-mount connection for telephone-interfacing projects but don't have the time or ability to cut a custom oval or square hole, this **RJ-12 or RJ-11 Telephone Round Panel Mount Plug** is the easiest and fastest way to panel-ify your existing phone kit. It's about 30mm in diameter so that you can drill a hole in your wood, plastic or metal with a common hole-saw or bit, no special shapes or filing required. Unscrew the plastic nut, insert the plug, and re-attach. Ta-da: Now you have a pass-through RJ-12 jack.

**Note that RJ-11 and RJ-12 use the same connector! The difference is that RJ-11 has only 4 wires inserted, while RJ-12 has all 6. So you can use this adapter for either. Note that this is not compatible with RJ-45 Ethernet Jacks or plugs;** those are bigger and have more contacts.

It's designed to easily attach to a panel up to 16mm thick (or 0.625") or as thin as a few mm. Perfect for adding a port to your project enclosure! Adafruit particularly like this adapter for its solid body and 'forgiving' plastic lip that hides the drill hole.

[We also have this available as a panel-mount extension cable](https://core-electronics.com.au/rj-12-or-rj-11-telephone-round-panel-mount-extension-cable.html).

## Technical Details

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/PID5859datasheet_114377950f0.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5859-1.jpg)