The Bearing,roller,rod End, cataloged under National Stock Number 3110-01-028-2506, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Rexnord Industries, Llc Div Aerosspace Bearing Operation. Government technical data includes 28 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-028-2506 |
| Primary Part Number | SF4-4A1-503 |
| Item Name | Bearing,roller,rod End |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Rexnord Industries, Llc Div Aerosspace Bearing Operation |
| Status | ACTIVE |
| Shank Diameter | 0.4370 INCHES NOMINAL IN |
| Shank Thread Length | 0.7500 INCHES MINIMUM AND 0.8100 INCHES MAXIMUM IN |
| Bearing Seal Type | CONTACT |
| Width Across Flats | 0.4370 INCHES NOMINAL IN |
| Lubrication Material | GREASE |
| Outer Ring Width | 0.3350 INCHES MINIMUM AND 0.3500 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE ALL EXTERNAL/EXPOSED METAL SURFACES |
| Shield Quantity | 2 |
| Style Designator | SINGLE ROW, CONCAVE ROLLERS |
| Material Document and Classification | MIL-S-7493 MIL SPEC SINGLE MATERIAL RESPONSE ROD END BODY |
| Material Document and Classification | MIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE ROLLER |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE SHIELD |
| Material Document and Classification | MIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE INNER RING |
| Overall Outside Diameter | 0.7500 INCHES MINIMUM AND 0.8000 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Self-Alignment Angle | 10.00 DEGREES NOMINAL |
| Shank Style | INTERNALLY THREADED |
| Alignment Type | SELF-ALIGNING |
| Surface Treatment | CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES |
| Seal Quantity | 2 |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Bore Diameter | 0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Length From Bore Center to Shank End | 1.3650 INCHES MINIMUM AND 1.3950 INCHES MAXIMUM IN |
| Material | STEEL COMP 4620 ROD END BODY |
| Material | STEEL COMP E52100 ROLLER |
| Material | STEEL SNAP RING |
| 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 |
|---|---|
| SF4-4A1-503 PRIMARY | Rexnord Industries, Llc Div Aerosspace Bearing Operation (USA) |
| Reference | Meaning |
|---|---|
| 39381-31 | 5/9 Secondary reference Rexnord Industries, Llc Div Aerosspace Bearing Operation |
NSN 3110-01-028-2506 is a Bearing,roller,rod End, manufactured by Rexnord Industries, Llc Div Aerosspace Bearing Operation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-028-2506 has 1 manufacturer part number on file: SF4-4A1-503 (Rexnord Industries, Llc Div Aerosspace Bearing Operation).
Key specifications for SF4-4A1-503: Shank Diameter: 0.4370 INCHES NOMINAL IN; Shank Thread Length: 0.7500 INCHES MINIMUM AND 0.8100 INCHES MAXIMUM IN; Bearing Seal Type: CONTACT; Width Across Flats: 0.4370 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.