Xem Studiomeasured geometryLibrary › Tri-clamp & pipe › ORFS O-ring face seal fittings (SAE J1453), dash -4 to -24: thread…
ORFS bulkhead lock-nut envelope, dash -16
ORFS bulkhead lock-nut envelope, dash -16: hex 1.750 in (44.45 mm) across flats × 0.410 in (10.41 mm) thick (Brennan FS0306-16), plain bore Ø36.51 at the nominal major diameter of 1 7/16-12 (a plain hole in place of the thread); no chamfers
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
| dash | -16 |
|---|---|
| tube OD (in) | 1 |
| thread (UN) | 1 7/16-12 |
| nut hex B (FS0318) | 1.625 in (41.27 mm) |
| nut width Q (in) | 1.095 |
| lock nut hex B (FS0306) | 1.750 in (44.45 mm) |
| lock nut width TT (in) | 0.410 |
| union hex H (FS2403, in) | 1.500 |
| male thread OD / female ID (in, as printed) | 1-7/16 (1.44) / 1-3/4 [sic] (1.36) |
| face-seal O-ring (Parker, AS568) | 2-021 (ID 0.93 / 23.5 in / mm, W 0.07 / 1.78) |
Let your AI pull this. Add
Set it up →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.From the full sheet
ORFS O-ring face seal fittings (SAE J1453), dash -4 to -24: thread, tube OD, O-ring size, nut hex + lock-nut envelopes: every size, notes, mating features and sources. What thread, O-ring and wrench size is an ORFS -6 or -8 fitting?