The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-413-3979, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is New Hampshire Ball Bearings Inc Div Astro Division. Government technical data includes 11 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. 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 | 3120-00-413-3979 |
| Primary Part Number | ASSB4-9 |
| Item Name | Bearing,plain,self-Aligning |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | New Hampshire Ball Bearings Inc Div Astro Division |
| Status | ACTIVE |
| Inner Member Width | 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN |
| Outer Member Width | 0.2140 INCHES MINIMUM AND 0.2240 INCHES MAXIMUM IN |
| Style Designator | WITH INSERT AND/OR LINER |
| Material Document and Classification | MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION |
| Static Radial Load Rating | 100 POUNDS LBS |
| Bore Diameter | 0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Material | PLASTIC RACE LINER |
| Material | STEEL COMP 440C INNER MEMBER |
| Material | STEEL COMP 630 OUTER RACE MEMBER |
| Material | OIL LUBRICATING LUBRICATION |
| Outer Member Outside Diameter | 0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM 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 3120-00-413-3979 is a Bearing,plain,self-Aligning, manufactured by New Hampshire Ball Bearings Inc Div Astro Division, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-413-3979 has 2 manufacturer part numbers on file: 734905-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace), ASSB4-9 (New Hampshire Ball Bearings Inc Div Astro Division).
2 possible matches (shared part number, not a government interchangeability claim): 2530-00-734-9051, 5935-01-413-1008. Verify interchangeability with system specifications before substitution.
Key specifications for ASSB4-9: Inner Member Width: 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN; Outer Member Width: 0.2140 INCHES MINIMUM AND 0.2240 INCHES MAXIMUM IN; Style Designator: WITH INSERT AND/OR LINER; Material Document and Classification: MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION. 11 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.