The Bearing Unit,ball, cataloged under National Stock Number 3130-00-159-1478, 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 28 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3130-00-159-1478 |
| Primary Part Number | LAK1 1/4 |
| Item Name | Bearing Unit,ball |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Timken Co Div the Timken Company |
| Status | ACTIVE |
| Seal Type | LABYRINTH |
| Lubrication Material | GREASE |
| Lubrication Fitting Type | PIPE PLUG |
| Assembly Overall Length | 1.9062 INCHES NOMINAL IN |
| Housing Height | 3.6250 INCHES NOMINAL IN |
| Mounting Slot Length | 0.7500 INCHES NOMINAL IN |
| Internal Fit-Up Designation | STANDARD |
| Mounting Hole Type | SLOTTED |
| Rotating Element Locking Method | SETSCREW LOCKING COLLAR |
| Seal Location | BOTH ENDS |
| Block Type | FIXED |
| Style Designator | PILLOW BLOCK, SOLID |
| Collar Location | ONE END |
| Features Provided | GROUND ROLLING ELEMENT GROOVE |
| Center to Center Distance Between Mounting Holes Along Width | 5.0000 INCHES NOMINAL IN |
| Housing Width | 6.5625 INCHES NOMINAL IN |
| Base Length | 2.0156 INCHES NOMINAL IN |
| Alignment Type | SELF-ALIGNING |
| Rolling Element Groove Quantity | 1 |
| Shaft End Type | OPEN |
| Base Thickness | 0.7500 INCHES NOMINAL IN |
| Bore Diameter | 1.2500 INCHES NOMINAL IN |
| Material | IRON CAST HOUSING |
| Material | STEEL SEAL |
| Height From Bottom of Base to Bore Centerline | 1.8125 INCHES NOMINAL IN |
| Lubrication Fitting Angle From Horizontal Centerline | 90.0 DEGREES NOMINAL |
| Load Capability Type | RADIAL |
| Mounting Slot Width | 0.5625 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 |
| Part Number | Manufacturer |
|---|---|
| LAK1 1/4 PRIMARY | Timken Co Div the Timken Company (USA) |
| SYH1.1/4WF | Skf Usa Inc. (USA) |
| Reference | Meaning |
|---|---|
| S520M | 5/9 Secondary reference Stephens-Adamson Inc a Sub of Allis-Chalmers Corp |
| SXB1-1-4 | 5/9 Secondary reference Reliance Electric Company Dba Reliance & Dodge Brands |
| SYH104X | 5/9 Secondary reference Skf Usa Inc. |
| SYH11/4 WM | 5/9 Secondary reference Skf Usa Inc. |
| S520M | 5/9 Secondary reference Timken Co Div the Timken Company |
NSN 3130-00-159-1478 is a Bearing Unit,ball, manufactured by Timken Co Div the Timken Company, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-00-159-1478 has 2 manufacturer part numbers on file: LAK1 1/4 (Timken Co Div the Timken Company), SYH1.1/4WF (Skf Usa Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5360-00-291-7131. Verify interchangeability with system specifications before substitution.
Key specifications for LAK1 1/4: Seal Type: LABYRINTH; Lubrication Material: GREASE; Lubrication Fitting Type: PIPE PLUG; Assembly Overall Length: 1.9062 INCHES NOMINAL IN. 28 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.