The Nut,union, cataloged under National Stock Number 4730-01-149-6693, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-149-6693 |
| Primary Part Number | 810-1389543 PC7 |
| Item Name | Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Width Across Flats | 2.563 INCHES NOMINAL IN |
| Shoulder Step Width | 0.250 INCHES NOMINAL IN |
| Shoulder Width | 0.250 INCHES NOMINAL IN |
| Thread Series | UNS |
| Thread Pitch Diameters | +2.2175 TO 2.2239 INCHES IN |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Maximum Working Pressure Rating and Service for Which Designed | 3000.0 POUNDS PER SQUARE INCH (PSI) OIL AND 3000.0 POUNDS PER SQUARE INCH (PSI) WATER LBS |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.312 INCHES IN |
| Nut Height | 1.188 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | COPPER ALLOY AND NICKEL ALLOY OVERALL |
| Smallest Inside Diameter | 1.940 INCHES NOMINAL IN |
| Shoulder Seat Diameter | 2.312 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 810-1389543 PC7 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 511-4684516 | D/9 Drawing number reference only U.S. Government activity |
| 511-4684516 ITEM F24 | 5/2 Secondary reference U.S. Government activity |
| 810-1385943PC7 | 3/2 Design control — primary reference U.S. Government activity |
| 15-12-0006 | 3/2 Design control — primary reference U.S. Government activity |
| 810-1385943 | D/9 Drawing number reference only U.S. Government activity |
| 810-1385943 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 803-1385943 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4730-01-149-6693 is a Nut,union, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-149-6693 has 1 manufacturer part number on file: 810-1389543 PC7 (Derbyshire Machine & Tool Co).
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-149-6795, 4730-01-156-8230, 4730-01-183-1403. Verify interchangeability with system specifications before substitution.
Key specifications for 810-1389543 PC7: Width Across Flats: 2.563 INCHES NOMINAL IN; Shoulder Step Width: 0.250 INCHES NOMINAL IN; Shoulder Width: 0.250 INCHES NOMINAL IN; Thread Series: UNS. 16 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.