The Tailpiece,relief Valve, cataloged under National Stock Number 4820-01-213-8065, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-213-8065 |
| Item Name | Tailpiece,relief Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | CU-NI PER MIL-C-20159B;500.0 PSI;VALVE SIZE 2.500 IN.;ENDS FLANGED;ONE END OD 6.125 IN.;6 HOLES 0.688 IN. DIA EQUALLY SPACED ON 5.000 IN. BCD;OTHER END 6 HOLES 0.812 IN.EQUALLY SPACED ON 5.000 BCD;ONE END AT ANGLE TO OTHER;FACE TO CENTER LINE 5.500 IN. IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SSN637-516-2159967 PIECE 20 | 5/2 Secondary reference U.S. Government activity |
| 77791-25X2 | D/9 Drawing number reference only U.S. Government activity |
| 137804 | 5/9 Secondary reference U.S. Government activity |
| 77791-25X2 PIECE 20 | 3/2 Design control — primary reference U.S. Government activity |
| SSN637-516-2159967 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-213-8065 is a Tailpiece,relief Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5930-01-497-5108. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-213-8065: General Characteristics Item Description: CU-NI PER MIL-C-20159B;500.0 PSI;VALVE SIZE 2.500 IN.;ENDS FLANGED;ONE END OD 6.125 IN.;6 HOLES 0.688 IN. DIA EQUALLY SPACED ON 5.000 IN. BCD;OTHER END 6 HOLES 0.812 IN.EQUALLY SPACED ON 5.000 BCD;ONE END AT ANGLE TO OTHER;FACE TO CENTER LINE 5.500 IN. IN. 1 specification is 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.