The Bearing,ball,annular, cataloged under National Stock Number 3110-00-078-5686, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is New Hampshire Ball Bearings Inc Div Precision Division. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-078-5686 |
| Primary Part Number | 137987-03 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | New Hampshire Ball Bearings Inc Div Precision Division |
| Status | ACTIVE |
| Lubrication Material | OIL |
| Internal Clearance | 0.0002 INCHES MINIMUM RADIAL AND 0.0004 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Shield Quantity | 2 |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Overall Outside Diameter | 0.4996 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Bore Shape | STRAIGHT |
| Contact Angle | 25.0 DEGREES MAXIMUM |
| Load Direction | ANGULAR |
| Bore Diameter | 0.1873 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN |
| Material | STEEL OUTER RING |
| Material | STEEL INNER RING |
| Material | STEEL COMP 301 RETAINER |
| Material | STEEL BALL |
| Lubrication Material Document and Classification | MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE |
| 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 |
|---|---|
| 137987-03 PRIMARY | New Hampshire Ball Bearings Inc Div Precision Division (USA) |
| 137987-03 PRIMARY | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation (USA) |
| 137987-03 PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| Reference | Meaning |
|---|---|
| R1665PPDC73WK24 | 5/9 Secondary reference New Hampshire Ball Bearings Inc Div Precision Division |
| RI-6632ZZA0208RA5P24T44LY214U | 5/1 Secondary reference New Hampshire Ball Bearings Inc Div Precision Division |
| 137987-03 | 7/2 Vendor item drawing reference Ge Aviation Systems Llc |
| 3110PL0138810 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3110-00-078-5686 is a Bearing,ball,annular, manufactured by New Hampshire Ball Bearings Inc Div Precision Division, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-078-5686 has 3 manufacturer part numbers on file: 137987-03 (New Hampshire Ball Bearings Inc Div Precision Division), 137987-03 (Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation), 137987-03 (Mpb Corp Div Timken Super Precision).
Key specifications for 137987-03: Lubrication Material: OIL; Internal Clearance: 0.0002 INCHES MINIMUM RADIAL AND 0.0004 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND; Shield Quantity: 2. 15 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.