The Nut,union, cataloged under National Stock Number 4730-00-277-3345, 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 13 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-277-3345 |
| Primary Part Number | 5000S4823-841337PC4 |
| 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 | 2.750 INCHES NOMINAL IN |
| Shoulder Step Width | 0.313 INCHES NOMINAL IN |
| Shoulder Width | 1.031 INCHES NOMINAL IN |
| Thread Series | UN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.125 INCHES IN |
| Nut Height | 2.281 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Quantity Per Inch | 12 |
| Material | NICKEL ALLOY OVERALL |
| Smallest Inside Diameter | 1.469 INCHES NOMINAL IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY THD SIZE |
| Shoulder Seat Diameter | 1.984 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 |
|---|---|
| 5000S4823-841337PC4 | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 8569-033PC35 | 5/2 Secondary reference U.S. Government activity |
| 9869-027X8PC35 | 5/2 Secondary reference U.S. Government activity |
| 5000S4823-841337PC4 | 3/1 Design control — primary reference U.S. Government activity |
| 8600-206PC22 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-00-277-3345 is a Nut,union, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-277-3345 has 1 manufacturer part number on file: 5000S4823-841337PC4 (Derbyshire Machine & Tool Co).
4 possible matches (shared part number, not a government interchangeability claim): 4730-00-277-3346, 4730-00-277-3347, 4730-00-277-3348. Verify interchangeability with system specifications before substitution.
Key specifications for 5000S4823-841337PC4: Width Across Flats: 2.750 INCHES NOMINAL IN; Shoulder Step Width: 0.313 INCHES NOMINAL IN; Shoulder Width: 1.031 INCHES NOMINAL IN; Thread Series: UN. 13 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.