The Seat,valve, cataloged under National Stock Number 4820-01-241-2011, 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 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-241-2011 |
| Primary Part Number | 181547-81CP |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Body Outside Diameter | 1.499 INCHES MINIMUM IN |
| Criticality Code Justification | ZZZY |
| Body Stepped Inside Diameter | 0.878 INCHES MAXIMUM SECOND STEP IN |
| Body Stepped Inside Diameter | 0.987 INCHES MINIMUM FIRST STEP IN |
| Style Designator | PLAIN |
| Material Document and Classification | MIL-M-20693 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Seat Radius | 0.0025 INCHES MAXIMUM IN |
| Material | PLASTIC OVERALL |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330 |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 181547-81CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 181547-81 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4820-01-241-2011 is a Seat,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-241-2011 has 1 manufacturer part number on file: 181547-81CP (Naval Inventory Control Point Mechanicsburg).
Key specifications for 181547-81CP: Overall Height: 0.225 INCHES NOMINAL IN; Body Outside Diameter: 1.499 INCHES MINIMUM IN; Criticality Code Justification: ZZZY; Body Stepped Inside Diameter: 0.878 INCHES MAXIMUM SECOND STEP IN. 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.