The Locknut,pipe, cataloged under National Stock Number 4730-01-651-6897, 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 Mcmaster-Carr Supply Co. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-651-6897 |
| Primary Part Number | 4429K121 |
| Item Name | Locknut,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Width Across Flats | 0.75 INCHES NOMINAL IN |
| Thread Series | NPSL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.125 INCHES IN |
| Nut Height | 0.19 INCHES NOMINAL IN |
| Nut Style | PIPE LOCKNUT |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 4429K121 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 900556 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-651-6897 is a Locknut,pipe, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-651-6897 has 1 manufacturer part number on file: 4429K121 (Mcmaster-Carr Supply Co).
Key specifications for 4429K121: Width Across Flats: 0.75 INCHES NOMINAL IN; Thread Series: NPSL; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.125 INCHES IN. 7 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.