Library › Hardware › Hex nuts, hex jam nuts and heavy hex nuts, inch 7/8 to 1-1/2 (ASME…

heavy hex jam nut 1-1/8 envelope

heavy hex jam nut 1-1/8 envelope: hexagon 1.812 in across flats x .639 in thick (F max, H max), plain bore Ø1.1250 in at the thread major, thread not drawn

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

typeheavy hex jam nut
size (in)1-1/8
UNC / UNF TPI7 / 12
F across flats max / min1.812 / 1.756
G across corners max / min2.093 / 2.002
H thickness max / min.639 / .579
sourceAFT
file: F max / H max (mm)46.02 / 16.23
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

Hex nuts, hex jam nuts and heavy hex nuts, inch 7/8 to 1-1/2 (ASME B18.2.2): across flats, thickness, UNC / UNF: every size, notes, mating features and sources. What are the across-flats width and thickness of a 7/8 to 1-1/2 inch hex nut, jam nut or heavy hex nut?

Other sizes