The Seat,valve, cataloged under National Stock Number 4820-01-179-6728, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is L3 Technologies, Inc. Div Ocean Systems. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-179-6728 |
| Primary Part Number | 3322717 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | L3 Technologies, Inc. Div Ocean Systems |
| Status | ACTIVE |
| Body Outside Diameter | 0.610 INCHES MINIMUM AND 0.611 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-763 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.3750 INCHES MINIMUM AND 0.3754 INCHES MAXIMUM IN |
| Material | STEEL COMP 440C 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 |
|---|---|
| 3322717 PRIMARY | L3 Technologies, Inc. Div Ocean Systems (USA) |
| Reference | Meaning |
|---|---|
| 3322717 | 5/9 Secondary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
NSN 4820-01-179-6728 is a Seat,valve, manufactured by L3 Technologies, Inc. Div Ocean Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-179-6728 has 1 manufacturer part number on file: 3322717 (L3 Technologies, Inc. Div Ocean Systems).
Key specifications for 3322717: Overall Height: 1.438 INCHES MINIMUM AND 1.442 INCHES MAXIMUM IN; Body Outside Diameter: 0.610 INCHES MINIMUM AND 0.611 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-763 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Body Inside Diameter: 0.3750 INCHES MINIMUM AND 0.3754 INCHES MAXIMUM IN. 4 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.