The Locknut,tube Fitting, cataloged under National Stock Number 4730-00-282-4609, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-282-4609 |
| Item Name | Locknut,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UN |
| Material Document and Classification | QQ-S-637,COMP 1137 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-637,COMP 1141 FED SPEC 2ND MATERIAL RESPONSE OR MIL-S-562 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.625 INCHES IN |
| Nut Height | 0.422 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | TUBE FITTING LOCKNUT |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 4140 OR STEEL COMP 4130 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SAE-AS4841 | 5/1 Secondary reference Sae International Dba Sae International |
| 5310PL1428361 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5310002824609 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MILF5509 | 5/9 Secondary reference U.S. Government activity |
| AN6289-20 | 5/9 Secondary reference U.S. Government activity |
| 5310002824609 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| AS5179-20 | 2/2 Government specification standardization U.S. Government activity |
NSN 4730-00-282-4609 is a Locknut,tube Fitting, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-00-793-5432. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-282-4609: Width Across Flats: 1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UN; Material Document and Classification: QQ-S-637,COMP 1137 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-637,COMP 1141 FED SPEC 2ND MATERIAL RESPONSE OR MIL-S-562 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 4TH MATERIAL RESPONSE OVERALL. 12 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.