The Bearing,ball,airframe, cataloged under National Stock Number 3110-01-274-5738, 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 18 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-274-5738 |
| Primary Part Number | SSRI-538ZZEE RA5P511L01U |
| Item Name | Bearing,ball,airframe |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | New Hampshire Ball Bearings Inc Div Precision Division |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Lubrication Material | OIL |
| Outer Ring Width | 0.2500 INCHES NOMINAL IN |
| Internal Fit-Up Designation | STANDARD |
| Shield Quantity | 2 |
| Style Designator | SINGLE ROW INNER RING EXTENDED BOTH SIDES |
| Overall Outside Diameter | 1.0625 INCHES NOMINAL IN |
| Load Direction | RADIAL |
| Alignment Type | RIGID |
| Standard Tolerance Designation | ABEC NO. 5T |
| Bore Diameter | 0.6250 INCHES NOMINAL IN |
| Material | STEEL COMP 440C INNER RING |
| Material | STEEL COMP 440C OUTER RING |
| Material | STEEL RETAINER |
| Material | STEEL COMP 440C SHIELD |
| Material | STEEL COMP 440C BALL |
| Lubrication Material Document and Classification | MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE |
| Inner Ring Width | 0.2812 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 |
|---|---|
| SSRI-538ZZEE RA5P511L01U PRIMARY | New Hampshire Ball Bearings Inc Div Precision Division (USA) |
| Reference | Meaning |
|---|---|
| SR538PPD3ABEC5T | 5/9 Secondary reference U.S. Government activity |
| ST538PPD3 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 3TKR21-28UL02 | 5/9 Secondary reference Mpb Corp Div Timken Super Precision |
| 2910054-1 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| SR538PPD3 | 5/9 Secondary reference U.S. Government activity |
NSN 3110-01-274-5738 is a Bearing,ball,airframe, manufactured by New Hampshire Ball Bearings Inc Div Precision Division, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-274-5738 has 1 manufacturer part number on file: SSRI-538ZZEE RA5P511L01U (New Hampshire Ball Bearings Inc Div Precision Division).
Key specifications for SSRI-538ZZEE RA5P511L01U: Retainer Fabrication Method: PRESSED; Lubrication Material: OIL; Outer Ring Width: 0.2500 INCHES NOMINAL IN; Internal Fit-Up Designation: STANDARD. 18 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.