The Disk,valve, cataloged under National Stock Number 4820-00-623-8588, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tescom Corp Dba Tescom Div Tescom. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-623-8588 |
| Primary Part Number | 5377-3 AND 4099-4 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tescom Corp Dba Tescom Div Tescom |
| Status | ACTIVE |
| Shoulder Height | 0.020 INCHES NOMINAL IN |
| Outside Diameter | 0.280 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Inside Diameter | 0.080 INCHES NOMINAL IN |
| Material | PLASTIC |
| 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 |
|---|---|
| 5377-3 AND 4099-4 PRIMARY | Tescom Corp Dba Tescom Div Tescom (USA) |
| Reference | Meaning |
|---|---|
| 5377 | 5/9 Secondary reference Tescom Corp Dba Tescom Div Tescom |
| 26-1521-34-149PC20 | 5/9 Secondary reference Tescom Corp Dba Tescom Div Tescom |
NSN 4820-00-623-8588 is a Disk,valve, manufactured by Tescom Corp Dba Tescom Div Tescom, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-623-8588 has 1 manufacturer part number on file: 5377-3 AND 4099-4 (Tescom Corp Dba Tescom Div Tescom).
3 possible matches (shared part number, not a government interchangeability claim): 5120-00-812-5522, 4820-01-263-0374, 5950-01-292-9966. Verify interchangeability with system specifications before substitution.
Key specifications for 5377-3 AND 4099-4: Overall Height: 0.085 INCHES NOMINAL IN; Shoulder Height: 0.020 INCHES NOMINAL IN; Outside Diameter: 0.280 INCHES NOMINAL IN; Style Designator: PLAIN. 5 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.