The Nut,union, cataloged under National Stock Number 4730-01-044-5146, 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 Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-044-5146 |
| Primary Part Number | K652013-13 |
| Item Name | Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing |
| Status | ACTIVE |
| Shoulder Step Width | 0.380 INCHES NOMINAL IN |
| Shoulder Width | 0.094 INCHES NOMINAL IN |
| Thread Series | UN |
| Hole Configuration Style | CONFIGURATION F |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.500 INCHES IN |
| Nut Diameter | 3.870 INCHES NOMINAL IN |
| Nut Height | 1.250 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.144 INCHES MINIMUM AND 0.151 INCHES MAXIMUM IN |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 16 |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Smallest Inside Diameter | 2.820 INCHES MINIMUM AND 2.830 INCHES MAXIMUM IN |
| Hole Type and Quantity | 1 DRILLED |
| Shoulder Seat Diameter | 3.500 INCHES MINIMUM AND 3.530 INCHES MAXIMUM 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 |
|---|---|
| K652013-13 PRIMARY | Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| K652013-13 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-044-5146 is a Nut,union, manufactured by Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-044-5146 has 1 manufacturer part number on file: K652013-13 (Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing).
Key specifications for K652013-13: Shoulder Step Width: 0.380 INCHES NOMINAL IN; Shoulder Width: 0.094 INCHES NOMINAL IN; Thread Series: UN; Hole Configuration Style: CONFIGURATION F. 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.