The Valve,flow Control, cataloged under National Stock Number 4820-01-550-0154, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-550-0154 |
| Primary Part Number | 7648173-1D1 |
| Item Name | Valve,flow Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Connection Type | THREADED INTERNAL PIPE |
| End Connection Quantity | 2 |
| Nominal Thread Size | 0.125 INCHES IN |
| Thread Quantity Per Inch | 27 |
| Thread Series Designator | NPT |
| Valve Operation Method | MANUAL |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P9290 SYSTEM CERTIFICATION PROCEDURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS AND REQUIRES CLEANING, PACKING, AND MARKING IAW MIL-STD-1622 OR MIL-STD-1330 AS DEEMED APPLICABLE; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICALS AS DIFFERENTIATED BY SPECIAL TEST FEATURES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 7648173-1D1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 7648173-1 | 5/1 Secondary reference Tecnico Corporation |
| 7648173-1 | 5/1 Secondary reference Hii Unmanned Systems, Inc. |
| 7648173 | D/9 Drawing number reference only Naval Sea Systems Command |
| 7648173-1 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 4820-01-550-0154 is a Valve,flow Control, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-550-0154 has 1 manufacturer part number on file: 7648173-1D1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 7648173-1D1: Criticality Code Justification: ZZZY; Connection Type: THREADED INTERNAL PIPE; End Connection Quantity: 2; Nominal Thread Size: 0.125 INCHES IN. 8 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.