The Elbow,hose to Boss, cataloged under National Stock Number 4730-00-258-8553, 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 10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-258-8553 |
| Item Name | Elbow,hose to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 HOSE COUPLING NUT |
| Flow Angle | 90.0 DEGREES |
| Nominal Outside Diameter Hose Accommodated | 1.781 INCHES FIRST END IN |
| Criticality Code Justification | ZZZY |
| Connection Type | THREADED EXTERNAL HOSE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Material Document and Classification | QQ-N-281,CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nondefinitive Spec/std Data | BL TYPE |
| Thread Class | 3A SECOND END A |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| MILH24135L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| FC7181-1216-4L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| MILH24135 | 4/1 Identification reference U.S. Government activity |
| FC7181-1216-4 | 3/1 Design control — primary reference Danfoss Power Solutions II, Llc |
NSN 4730-00-258-8553 is a Elbow,hose to Boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-354-8999. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-258-8553: Furnished Items and Quantity: 1 HOSE COUPLING NUT; Flow Angle: 90.0 DEGREES; Nominal Outside Diameter Hose Accommodated: 1.781 INCHES FIRST END IN; Criticality Code Justification: ZZZY. 10 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.