# 12 V car accessory socket, SAE J563 size B (Ø21.46 mm)

> What are the dimensions of the 12 V car accessory socket, SAE J563 size B?

- Category: Tools & garage › 12 V sockets & EV inlets
- Kind: Modern device
- Basis: Secondary source: Wikipedia (copy of the maker's figures; the maker publishes none directly)
- Page: https://xemstudio.com/objects/12v-car-socket-sae-j563-size-b/ · JSON: https://xemstudio.com/api/geometry?object=12v-car-socket-sae-j563-size-b · Plain text: https://xemstudio.com/objects/12v-car-socket-sae-j563-size-b/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
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## Overall (mm)

| length | width |
|---|---|
| 21.46 | 21.46 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- ANSI/SAE J563 gives the receptacle bore as 21.41–21.51 mm and the plug body as 21.13–21.33 mm. Size B is found mostly in European cars, and sometimes as a second DC outlet in American cars.
- Numbers come from a Wikipedia summary of SAE J563, not the paid standard itself.
- No CAD file: the maker publishes only overall sizes, and a plain box or cylinder is not useful design geometry. The table is the published data; parts with real geometry have their own pages.
- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.

## Sizes

| dimension | value |
|---|---|
| Receptacle inner diameter | 21.41–21.51 mm (median 21.46 mm) |
| Plug body diameter | 21.13–21.33 mm (median 21.23 mm) |
| Standard | ANSI/SAE J563 |
| Depth | not published |

## Where the files are

- Wikipedia: [Automobile auxiliary power outlet (ANSI/SAE J563 dimensions)](https://en.wikipedia.org/wiki/Automobile_auxiliary_power_outlet) — web — Publisher's page; dimensions are facts

## Questions

**What is the diameter of a 12 V car socket?**

21.41–21.51 mm inside for this size; plugs are 21.13–21.33 mm.

## Fits with

- [12 V car accessory socket, SAE J563 size A (Ø20.97 mm)](https://xemstudio.com/objects/12v-car-socket-sae-j563-size-a/)
- [6 V car lighter socket, SAE J563 (Ø21.4 mm)](https://xemstudio.com/objects/6v-car-socket-sae-j563/)
- [Volex NACS (SAE J3400) EV charging inlet](https://xemstudio.com/objects/volex-nacs-ev-charging-inlet/)