The Collar,valve, cataloged under National Stock Number 4820-01-077-8771, 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1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-077-8771 |
| Item Name | Collar,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | BRONZE,NICKEL-ALUMINUM,MIL-B-24059; POLYTETRAFLUOROETHYLENE COATED PER GENERAL NOTE 10; 6.250 IN. DIA;6.500-12UN-3A; 45 DEG CHAMFER TO 6.360 IN. DIA; 2 HOLES 180 DEG APART 0.312 IN. DIA 0.750 IN. DEEP FOR SPANNER WRENCH; 1.440 IN. H O/A A |
| 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 |
|---|---|
| 87615-2003 ITEM9 | 3/2 Design control — primary reference U.S. Government activity |
| 520-4674721 ITEM9 | 5/2 Secondary reference U.S. Government activity |
| 520-4674721 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-077-8771 is a Collar,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5365-01-087-0004, 3950-01-153-1524. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-077-8771: General Characteristics Item Description: BRONZE,NICKEL-ALUMINUM,MIL-B-24059; POLYTETRAFLUOROETHYLENE COATED PER GENERAL NOTE 10; 6.250 IN. DIA;6.500-12UN-3A; 45 DEG CHAMFER TO 6.360 IN. DIA; 2 HOLES 180 DEG APART 0.312 IN. DIA 0.750 IN. DEEP FOR SPANNER WRENCH; 1.440 IN. H O/A A; End Item Identification: SSBN TRIDENT CLASS. 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.