Xem Studiomeasured geometry

Library › Electronics › Computer storage ·

3.5 inch hard drive (SFF-8301)

What are the dimensions of a 3.5 inch hard drive? · Modern device · basis: SFF-8301 (SNIA SFF)

Also called: 3.5 hard drive dimensions, 3.5 inch hdd size, 3.5 drive mounting holes, medidas disco duro 3.5, dimensões HD 3.5, 3,5 Zoll Festplatte Maße, dimensions disque dur 3,5 pouces

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

length
147.0 mm
width
101.6 mm
height
26.1 mm

Notes

  • 3.5 in drive: 101.6 mm wide, up to 147 mm long, 26.1 mm tall (1 in class; 17.8 and 42.0 also defined).
  • Mounting: 6-32 UNC holes; bottom hole pair 41.28 mm and 44.45 / 76.20 mm from the reference per SFF-8301 table (dims A6, A7, A13); 95.25 mm hole spacing across.
  • The file is the 101.6 × 147 × 26.1 envelope (holes not drawn: the open text does not tie each dimension to a face).

3.5 inch hard drive size chart

dimensionvalue
width101.60 mm
length (max)147.00 mm
height26.10 mm (1 in drive)
thread6-32 UNC

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

SNIA SFFSFF-8301 3.5 in form factorwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

hdd-3-5-envelopeEnvelope 147 × 101.6 × 26.1 mmSTEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=3-5-inch-hard-drive

3.5 inch hard drive (SFF-8301), isometric render of a generated part
Render of hdd-3-5-envelope from the free STEP; not to scale.

Fits with

length
2.5-inch drive (SATA SSD / HDD)100×69.85×9.5 mm★ sheet
M.2 2230 SSD / module size, isometric render of a generated part
M.2 2230 SSD / module size30×22×0.8 mm★ 1 file
M.2 2242 SSD / module size, isometric render of a generated part
M.2 2242 SSD / module size42×22×0.8 mm★ 1 file
M.2 2260 SSD / module size, isometric render of a generated part
M.2 2260 SSD / module size60×22×0.8 mm★ 1 file
M.2 2280 SSD / module size, isometric render of a generated part
M.2 2280 SSD / module size80×22×0.8 mm★ 1 file

Questions

How big is a 3.5 inch hard drive?

101.6 × 147 × 26.1 mm.