The Bearing Unit,ball, cataloged under National Stock Number 3130-01-138-5142, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Timken Co Div the Timken Company. Government technical data includes 25 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3130-01-138-5142 |
| Primary Part Number | RA1 1/4S FLANGETTE |
| Item Name | Bearing Unit,ball |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Timken Co Div the Timken Company |
| Status | ACTIVE |
| Seal Type | CONTACT |
| Assembly Overall Length | 1.4062 INCHES NOMINAL IN |
| Internal Fit-Up Designation | STANDARD |
| Flange Thickness | 0.2080 INCHES NOMINAL IN |
| Mounting Hole Type | SQUARE |
| Rotating Element Locking Method | ECCENTRIC CAM LOCKING COLLAR |
| Seal Location | BOTH ENDS |
| Block Type | FIXED |
| Style Designator | FLANGE BLOCK |
| Collar Location | ONE END |
| Overall Outside Diameter | 4.4375 INCHES NOMINAL IN |
| Mounting Hole Width | 0.4062 INCHES NOMINAL IN |
| Alignment Type | SELF-ALIGNING |
| Rolling Element Groove Quantity | 1 |
| Bolt Circle Diameter | 3.5625 INCHES NOMINAL IN |
| Shaft End Type | OPEN |
| Surface Treatment | CADMIUM HOUSING EXCLUDING BORE |
| Bore Diameter | 1.2500 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC SEAL |
| Material | STEEL HOUSING |
| Material | STEEL BEARING |
| Material | STEEL COLLAR |
| Housing Length | 0.6875 INCHES NOMINAL IN |
| Housing Diameter | 3.3125 INCHES NOMINAL IN |
| Load Capability Type | RADIAL |
| 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 |
|---|---|
| RA1 1/4S FLANGETTE | Timken Co Div the Timken Company (USA) |
| Reference | Meaning |
|---|---|
| A42126 | 3/9 Design control — primary reference Tennant Company |
| 42126 | 5/9 Secondary reference Tennant Company |
| A42126Y | 5/9 Secondary reference Tennant Company |
NSN 3130-01-138-5142 is a Bearing Unit,ball, manufactured by Timken Co Div the Timken Company, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-138-5142 has 1 manufacturer part number on file: RA1 1/4S FLANGETTE (Timken Co Div the Timken Company).
2 possible matches (shared part number, not a government interchangeability claim): 2805-01-354-7987, 5306-01-513-8379. Verify interchangeability with system specifications before substitution.
Key specifications for RA1 1/4S FLANGETTE: Seal Type: CONTACT; Assembly Overall Length: 1.4062 INCHES NOMINAL IN; Internal Fit-Up Designation: STANDARD; Flange Thickness: 0.2080 INCHES NOMINAL IN. 25 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.