The Disk,valve, cataloged under National Stock Number 4820-00-458-6877, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Heil Environmental Industries. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-458-6877 |
| Primary Part Number | 1681108 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Heil Environmental Industries |
| Status | ACTIVE |
| Outside Diameter | 1.750 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Inside Diameter | 0.625 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 |
|---|---|
| 1681108 PRIMARY | Heil Environmental Industries (USA) |
| Reference | Meaning |
|---|---|
| HM502 | 5/9 Secondary reference U.S. Government activity |
| H-502-M | 3/2 Design control — primary reference U.S. Government activity |
| 762E17 | 5/9 Secondary reference Diamond Reo Truck Co |
| 9-2923-99 | C/1 Advisory reference — outside the item-of-supply concept New Progress Inc |
NSN 4820-00-458-6877 is a Disk,valve, manufactured by Heil Environmental Industries, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-458-6877 has 1 manufacturer part number on file: 1681108 (Heil Environmental Industries).
Key specifications for 1681108: Overall Height: 0.375 INCHES NOMINAL IN; Outside Diameter: 1.750 INCHES NOMINAL IN; Style Designator: PLAIN; Inside Diameter: 0.625 INCHES NOMINAL 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.