The Bearing Unit,ball, cataloged under National Stock Number 3130-01-310-5853, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Thern Inc. Government technical data includes 20 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3130-01-310-5853 |
| Primary Part Number | A4725 |
| Item Name | Bearing Unit,ball |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Thern Inc |
| Status | ACTIVE |
| Lubrication Material | GREASE |
| Temp Rating | -65.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF |
| Housing Height | 4.969 INCHES NOMINAL IN |
| Internal Fit-Up Designation | STANDARD |
| Rotating Element Locking Method | DIRECT |
| Seal Location | BOTH ENDS |
| Block Type | FIXED |
| Style Designator | PILLOW BLOCK, SOLID |
| Center to Center Distance Between Mounting Holes Along Width | 6.312 INCHES MINIMUM AND 7.500 INCHES MAXIMUM IN |
| Housing Width | 8.875 INCHES NOMINAL IN |
| Alignment Type | SELF-ALIGNING |
| Rolling Element Groove Quantity | 1 |
| Base Thickness | 1.000 INCHES NOMINAL IN |
| Bore Diameter | 2.0000 INCHES NOMINAL IN |
| Material | IRON CAST HOUSING |
| Material | STEEL BALL |
| Material | PLASTIC POLYAMIDE NYLON SEAL |
| Housing Length | 2.312 INCHES NOMINAL IN |
| Height From Bottom of Base to Bore Centerline | 2.750 INCHES NOMINAL IN |
| Load Capability Type | RADIAL AND THRUST |
| 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 |
|---|---|
| A4725 PRIMARY | Thern Inc (USA) |
| Reference | Meaning |
|---|---|
| C-35-2 | 5/1 Secondary reference U.S. Government activity |
| SA2262 ITEM 5 | 5/1 Secondary reference Thern Inc |
NSN 3130-01-310-5853 is a Bearing Unit,ball, manufactured by Thern Inc, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-310-5853 has 1 manufacturer part number on file: A4725 (Thern Inc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-659-2292. Verify interchangeability with system specifications before substitution.
Key specifications for A4725: Lubrication Material: GREASE; Temp Rating: -65.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF; Housing Height: 4.969 INCHES NOMINAL IN; Internal Fit-Up Designation: STANDARD. 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.