The Retainer,disk,valve, cataloged under National Stock Number 4820-01-412-2652, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-412-2652 |
| Primary Part Number | P6894A |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| Valve Model Number for Which Designed | NAP704 |
| Outside Diameter | 1.500 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-895 MIL SPEC SINGLE MATERIAL RESPONSE |
| Nominal Thread Size | 1.250 INCHES IN |
| Valve Size for Which Designed | 3.000 INCHES IN |
| Inside Diameter | 0.875 INCHES NOMINAL IN |
| Valve Design Control Activity | 70667 |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| NAP-703 PC 10 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| P6894A PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| Reference | Meaning |
|---|---|
| P6894A | 5/9 Secondary reference Atlas Valve Co |
| NAP704 | D/9 Drawing number reference only Atlas Valve Co |
| NAP-704 PC 10 | 5/9 Secondary reference Atlas Valve Co |
NSN 4820-01-412-2652 is a Retainer,disk,valve, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-412-2652 has 2 manufacturer part numbers on file: NAP-703 PC 10 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), P6894A (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-413-4054. Verify interchangeability with system specifications before substitution.
Key specifications for P6894A: Valve Model Number for Which Designed: NAP704; Outside Diameter: 1.500 INCHES NOMINAL IN; Material Document and Classification: MIL-C-895 MIL SPEC SINGLE MATERIAL RESPONSE; Overall Length: 0.625 INCHES NOMINAL IN. 8 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.