The Valve,angle, cataloged under National Stock Number 4820-01-415-3171, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Steward Machine Co Inc. Government technical data includes 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-415-3171 |
| Primary Part Number | 900-845 |
| Item Name | Valve,angle |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Steward Machine Co Inc |
| Status | ACTIVE |
| Nominal Outside Diameter | 2.750 INCHES ALL ENDS IN |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 900-845 PRIMARY | Steward Machine Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 900-845 | 3/9 Design control — primary reference Hardie-Tynes Co., Inc. |
| 60-1059 | D/9 Drawing number reference only Hardie-Tynes Co., Inc. |
| 60-1059PC845 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
NSN 4820-01-415-3171 is a Valve,angle, manufactured by Steward Machine Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-415-3171 has 1 manufacturer part number on file: 900-845 (Steward Machine Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-415-4351. Verify interchangeability with system specifications before substitution.
Key specifications for 900-845: Nominal Outside Diameter: 2.750 INCHES ALL ENDS IN; Special Features: 2.375 IDX0.125 ANGLE VALVE FOR TURBINE MN FD; End Item Identification: 170 FOOT PATROL COASTAL FT; Material: COPPER ALLOY BODY. 2 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.