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ORFS bulkhead lock-nut envelope, dash -20
ORFS bulkhead lock-nut envelope, dash -20: hex 2.000 in (50.80 mm) across flats × 0.410 in (10.41 mm) thick (Brennan FS0306-20), plain bore Ø42.86 at the nominal major diameter of 1 11/16-12 (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 | -20 |
|---|---|
| tube OD (in) | 1 1/4 |
| thread (UN) | 1 11/16-12 |
| nut hex B (FS0318) | 1.875 in (47.62 mm) |
| nut width Q (in) | 1.095 |
| lock nut hex B (FS0306) | 2.000 in (50.80 mm) |
| lock nut width TT (in) | 0.410 |
| union hex H (FS2403, in) | 1.750 |
| male thread OD / female ID (in, as printed) | 1-11/16 (1.69) / 1-5/8 (1.61) |
| face-seal O-ring (Parker, AS568) | 2-025 (ID 1.18 / 29.9 in / mm, W 0.07 / 1.78) |
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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?