The Packing Nut, cataloged under National Stock Number 4730-00-770-9898, 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 Triumph Controls, Llc Dba Triumph Controls, Llc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-770-9898 |
| Primary Part Number | A6651-1 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Triumph Controls, Llc Dba Triumph Controls, Llc |
| Status | ACTIVE |
| Width Across Flats | 0.500 INCHES NOMINAL IN |
| Thread Length | 0.218 INCHES NOMINAL IN |
| Style Designator | HEXAGON, EXTERNAL THREAD, BOSS |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 7/16IN-20 IN |
| Screw Thread Series Designator | UNF |
| Thread Class | 2A A |
| Screw Thread Location | EXTERNAL |
| Material | ALUMINUM ALLOY 2024 |
| Smallest Inside Diameter | 0.2735 INCHES MINIMUM AND 0.2755 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 |
|---|---|
| A6651-1 PRIMARY | Triumph Controls, Llc Dba Triumph Controls, Llc (USA) |
| A6651-1 | Smiths Tubular Systems-Laconia, Inc. (USA) |
| Reference | Meaning |
|---|---|
| A6651-1 | 5/9 Secondary reference Titeflex Div of Atlas Corp Pacific Div |
| A6651-1 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-770-9898 is a Packing Nut, manufactured by Triumph Controls, Llc Dba Triumph Controls, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-770-9898 has 2 manufacturer part numbers on file: A6651-1 (Triumph Controls, Llc Dba Triumph Controls, Llc), A6651-1 (Smiths Tubular Systems-Laconia, Inc.).
Key specifications for A6651-1: Width Across Flats: 0.500 INCHES NOMINAL IN; Thread Length: 0.218 INCHES NOMINAL IN; Style Designator: HEXAGON, EXTERNAL THREAD, BOSS; Overall Length: 0.532 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN. 11 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.