The Seat,valve, cataloged under National Stock Number 4810-00-220-9041, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Clyde Pumps Ltd. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-00-220-9041 |
| Primary Part Number | S577 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Clyde Pumps Ltd |
| Status | ACTIVE |
| Material Document and Classification | ASTM-B138-58 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| S577 PRIMARY | Clyde Pumps Ltd (GBR) |
| A17505PC68 | Clyde Pumps Ltd (GBR) |
| Reference | Meaning |
|---|---|
| S557 | 5/9 Secondary reference Clyde Pumps Ltd |
NSN 4810-00-220-9041 is a Seat,valve, manufactured by Clyde Pumps Ltd, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-00-220-9041 has 2 manufacturer part numbers on file: S577 (Clyde Pumps Ltd), A17505PC68 (Clyde Pumps Ltd).
3 possible matches (shared part number, not a government interchangeability claim): 5340-00-675-6555, 4730-01-251-6484, 3460-01-353-8080. Verify interchangeability with system specifications before substitution.
Key specifications for S577: Material Document and Classification: ASTM-B138-58 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Material: COPPER ALLOY OVERALL. 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.