The Seat Unit,valve, cataloged under National Stock Number 4820-01-103-2755, 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 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-103-2755 |
| Primary Part Number | W-202B-A45-2 ITEM 31CP |
| Item Name | Seat Unit,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| 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 |
|---|---|
| W-202B-A45-2 ITEM 31CP | Naval Inventory Control Point Mechanicsburg (USA) |
| W-202B-A45-2 ITEM 31 | Grove Valve Operations (USA) |
| Reference | Meaning |
|---|---|
| M-13950-AA-1 ITEM 26CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 146-00107 | 3/1 Design control — primary reference Grove Valve Operations |
| 146-00107CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| M-13950-AA-1 ITEM 26 | 5/1 Secondary reference Grove Valve Operations |
NSN 4820-01-103-2755 is a Seat Unit,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-103-2755 has 2 manufacturer part numbers on file: W-202B-A45-2 ITEM 31CP (Naval Inventory Control Point Mechanicsburg), W-202B-A45-2 ITEM 31 (Grove Valve Operations).
Key specifications for W-202B-A45-2 ITEM 31CP: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. 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.