The Bumper,valve, cataloged under National Stock Number 4820-01-125-4547, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-125-4547 |
| Primary Part Number | 255770PIECE20 |
| Item Name | Bumper,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| General Characteristics Item Description | RUBBER,NEOPRENE; 0.812 IN. OD; 0.594 IN. H; 0.187 IN. SMALLEST ID IN |
| 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 |
|---|---|
| 255770PIECE20 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 255770 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 255770PIECE20 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-01-125-4547 is a Bumper,valve, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-125-4547 has 1 manufacturer part number on file: 255770PIECE20 (Huntington Ingalls Inc Div Newport News Shipbuilding).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-133-7858, 4820-01-207-9871, 4820-01-237-2849. Verify interchangeability with system specifications before substitution.
Key specifications for 255770PIECE20: General Characteristics Item Description: RUBBER,NEOPRENE; 0.812 IN. OD; 0.594 IN. H; 0.187 IN. SMALLEST ID 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.