The Bearing Unit,plain, cataloged under National Stock Number 3130-00-322-8280, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 20 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. 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 | 3130-00-322-8280 |
| Primary Part Number | 8485020 |
| Item Name | Bearing Unit,plain |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Lubrication Material | OIL |
| Lubrication Fitting Type | WICK |
| Housing Height | 2.2500 INCHES NOMINAL IN |
| Mounting Slot Length | 0.6250 INCHES NOMINAL IN |
| Mounting Hole Type | SLOTTED |
| Style Designator | PILLOW BLOCK, OPTIONAL SPLIT |
| Center to Center Distance Between Mounting Holes Along Width | 3.7500 INCHES NOMINAL IN |
| Housing Width | 5.0000 INCHES NOMINAL IN |
| Base Length | 1.2500 INCHES NOMINAL IN |
| Alignment Type | RIGID |
| Shaft End Type | OPEN |
| Base Thickness | 0.6250 INCHES NOMINAL IN |
| Bore Diameter | 0.7500 INCHES NOMINAL IN |
| Material | IRON CAST HOUSING |
| Material | COPPER ALLOY BEARING SURFACE |
| Housing Length | 2.0000 INCHES NOMINAL IN |
| Height From Bottom of Base to Bore Centerline | 1.1250 INCHES NOMINAL IN |
| Lubrication Fitting Angle From Horizontal Centerline | 90.0 DEGREES NOMINAL |
| Load Capability Type | RADIAL |
| Mounting Slot Width | 0.3750 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3130-00-322-8280 is a Bearing Unit,plain, manufactured by Us Army Aviation and Missile Command, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-00-322-8280 has 2 manufacturer part numbers on file: 8485020 (Us Army Aviation and Missile Command), SRP12 (Altra Industrial Motion Corp.).
1 possible match (shared part number, not a government interchangeability claim): 3130-00-939-6410. Verify interchangeability with system specifications before substitution.
Key specifications for 8485020: Lubrication Material: OIL; Lubrication Fitting Type: WICK; Housing Height: 2.2500 INCHES NOMINAL IN; Mounting Slot Length: 0.6250 INCHES NOMINAL IN. 20 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.