Xem Studiomeasured geometry

Library › Hardware › Tooth lock washers, inch (ASME B18.21.1): internal and external…

internal tooth lock washer 1/2 envelope

internal tooth lock washer 1/2 envelope: ring from ID min 0.512 in (Ø13.00 mm) to OD max 0.900 in (Ø22.86 mm), thickness max 0.045 in (1.14 mm); teeth and their twist are not modelled

Exact dimensions. True size, no tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

typeinternal tooth
size1/2
nominal (in)0.5
ID max / min (in)0.530 / 0.512
OD max / min (in)0.900 / 0.867
thickness max / min (in)0.045 / 0.037
OD max (mm)22.86
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 →

From the full sheet

Tooth lock washers, inch (ASME B18.21.1): internal and external tooth star washers, #2 to 1 in, ID, OD, thickness + ring envelopes: every size, notes, mating features and sources. What are the ID, OD and thickness of a #8 or 1/4 internal tooth or external tooth lock washer?

Other sizes