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ORFS bulkhead lock-nut envelope, dash -4
ORFS bulkhead lock-nut envelope, dash -4: hex 0.812 in (20.62 mm) across flats × 0.270 in (6.86 mm) thick (Brennan FS0306-04), plain bore Ø14.29 at the nominal major diameter of 9/16-18 (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 | -4 |
|---|---|
| tube OD (in) | 1/4 |
| thread (UN) | 9/16-18 |
| nut hex B (FS0318) | 0.687 in (17.45 mm) |
| nut width Q (in) | 0.580 |
| lock nut hex B (FS0306) | 0.812 in (20.62 mm) |
| lock nut width TT (in) | 0.270 |
| union hex H (FS2403, in) | 0.625 |
| male thread OD / female ID (in, as printed) | 9/16 (0.56) / 17/32 (0.51) |
| face-seal O-ring (Parker, AS568) | 2-011 (ID 0.30 / 7.7 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?