The Housing,impactor,hydraulic, cataloged under National Stock Number 3820-01-253-8634, is classified within Federal Supply Class 3820 (Mining, Rock Drilling, Earth Boring, and Related Equipment) of the Construction, Mining, Excavating Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3820-01-253-8634 |
| Item Name | Housing,impactor,hydraulic |
| FSC / FSG | 3820 / 38 — Mining, Rock Drilling, Earth Boring, and Related Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | UPPER HOUSING; W/ THRUST BEARING PIN |
| 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 |
|---|---|
| 810-0270 | 3/9 Design control — primary reference Fm Industries Inc |
| AA770 | 5/9 Secondary reference Hughes Christensen Co Hughes Drilling Equipment Div |
NSN 3820-01-253-8634 is a Housing,impactor,hydraulic, classified under FSC 3820, Mining, Rock Drilling, Earth Boring, and Related Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-551-7973. Verify interchangeability with system specifications before substitution.
Key specifications for 3820-01-253-8634: General Characteristics Item Description: UPPER HOUSING; W/ THRUST BEARING PIN; End Item Identification: HUGHES TOOL CO MODEL 1000 IMPACTOR. 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.