The Bearing Unit,ball, cataloged under National Stock Number 3130-00-055-4166, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Instruments and Flight Research, Inc.. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3130-00-055-4166 |
| Primary Part Number | 518309-16 |
| Item Name | Bearing Unit,ball |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Instruments and Flight Research, Inc. |
| Status | ACTIVE |
| Seal Type | CONTACT |
| Temp Rating | -55.0 CELSIUS AND 80.0 CELSIUS DEGC |
| Lubrication Fitting Type | SELF LUBRICATED |
| Assembly Overall Length | 1.4020 INCHES NOMINAL IN |
| Internal Fit-Up Designation | STANDARD |
| Rotating Element Locking Method | ECCENTRIC CAM LOCKING COLLAR |
| Seal Location | ONE END |
| Style Designator | CYLINDRICAL CARTRIDGE |
| Mounting Hole Diameter | 0.2500 INCHES NOMINAL IN |
| Features Provided | GROUND ROLLING ELEMENT GROOVE |
| Alignment Type | RIGID |
| Rolling Element Groove Quantity | 2 |
| Bore Diameter | 0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Housing Length | 0.5510 INCHES NOMINAL IN |
| Housing Diameter | 0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM 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 |
|---|---|
| 518309-16 PRIMARY | Instruments and Flight Research, Inc. (USA) |
| Reference | Meaning |
|---|---|
| MPK6-16 | 3/9 Design control — primary reference U.S. Government activity |
| RVBC2S1500-16 | 5/9 Secondary reference U.S. Government activity |
NSN 3130-00-055-4166 is a Bearing Unit,ball, manufactured by Instruments and Flight Research, Inc., classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-00-055-4166 has 1 manufacturer part number on file: 518309-16 (Instruments and Flight Research, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4710-01-656-2969. Verify interchangeability with system specifications before substitution.
Key specifications for 518309-16: Seal Type: CONTACT; Temp Rating: -55.0 CELSIUS AND 80.0 CELSIUS DEGC; Lubrication Fitting Type: SELF LUBRICATED; Assembly Overall Length: 1.4020 INCHES NOMINAL IN. 16 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.