12 V car accessory socket, SAE J563 size A (Ø20.97 mm) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/12v-car-socket-sae-j563-size-a/  (sheet CC BY 4.0)
Basis: Secondary source: Wikipedia (copy of the maker's figures; the maker publishes none directly)
Catalog version: 2026-10-20

Overall (mm): length 20.97, width 20.97
- ANSI/SAE J563 gives the receptacle bore as 20.93–21.01 mm and the plug body as 20.73–20.88 mm. Size A is found mostly 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.

dimension  value
Receptacle inner diameter  20.93–21.01 mm (median 20.97 mm)
Plug body diameter  20.73–20.88 mm (median 20.8 mm)
Standard  ANSI/SAE J563
Depth  not published

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Automobile auxiliary power outlet (ANSI/SAE J563 dimensions) — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/Automobile_auxiliary_power_outlet

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=12v-car-socket-sae-j563-size-a