The Bearing,ball,airframe, cataloged under National Stock Number 3110-01-129-6975, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-129-6975 |
| Primary Part Number | 38950-00906-103 |
| Item Name | Bearing,ball,airframe |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Bearing Seal Type | CONTACT |
| Lubrication Material | GREASE |
| Outer Ring Width | 0.3700 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN |
| Style Designator | SINGLE ROW, EXTERNAL SELF ALIGNING, W/ALIGNING RING |
| Overall Outside Diameter | 2.3740 INCHES MINIMUM AND 2.3750 INCHES MAXIMUM IN |
| Features Provided | ALIGNING RING |
| Load Direction | RADIAL |
| Alignment Type | SELF-ALIGNING |
| Surface Treatment | CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES |
| Seal Quantity | 2 |
| Bore Diameter | 1.4375 INCHES MINIMUM AND 1.4380 INCHES MAXIMUM IN |
| Material | STEEL OUTER RING |
| Material | STEEL INNER RING |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAL |
| Material | STEEL ALIGNMENT RING |
| Material | STEEL BALL |
| Self-Alignment Location | EXTERNAL |
| Lubrication Material Document and Classification | MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE |
| Inner Ring Width | 0.4345 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM 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 |
|---|---|
| 38950-00906-103 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| MKP23BSA1173 | 5/9 Secondary reference Timken Co Div the Timken Company |
| MKP23BS-004M | 5/1 Secondary reference Mpb Corp Div Timken Super Precision |
NSN 3110-01-129-6975 is a Bearing,ball,airframe, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-129-6975 has 1 manufacturer part number on file: 38950-00906-103 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 38950-00906-103: Bearing Seal Type: CONTACT; Lubrication Material: GREASE; Outer Ring Width: 0.3700 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN; Style Designator: SINGLE ROW, EXTERNAL SELF ALIGNING, W/ALIGNING RING. 19 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.