The Cam Follower,needle Bearing, cataloged under National Stock Number 3110-01-134-5871, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Rbc Aircraft Products, Inc.. Government technical data includes 25 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-134-5871 |
| Primary Part Number | ST4M205-5 |
| Item Name | Cam Follower,needle Bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Rbc Aircraft Products, Inc. |
| Status | ACTIVE |
| Bearing Seal Type | CONTACT |
| Lubrication Material | GREASE |
| Outer Ring Width | 0.4280 INCHES MINIMUM AND 0.4330 INCHES MAXIMUM IN |
| Thread Length | 0.3360 INCHES MINIMUM AND 0.3760 INCHES MAXIMUM IN |
| Style Designator | CAM FOLLOWER |
| Material Document and Classification | AMS 5630 ASSN STD SINGLE MATERIAL RESPONSE ROLLER |
| Material Document and Classification | AMS 5630 ASSN STD SINGLE MATERIAL RESPONSE OUTER RING |
| Material Document and Classification | AMS 3651 ASSN STD SINGLE MATERIAL RESPONSE END PLATE |
| Material Document and Classification | AMS 3651 ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Overall Outside Diameter | 0.6245 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Stud Length | 0.8260 INCHES MINIMUM AND 0.8730 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Seal Quantity | 2 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 440C OUTER RING |
| Material | STEEL COMP 440C ROLLER |
| Material | PLASTIC POLYAMIDE NYLON SEAL |
| Material | STEEL COMP 420 END PLATE |
| Material | STEEL COMP 420 STUD |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Lubrication Material Document and Classification | MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE |
| Stud Diameter | 0.3105 INCHES MINIMUM AND 0.3120 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 |
|---|---|
| ST4M205-5 PRIMARY | Rbc Aircraft Products, Inc. (USA) |
| ST4M205-5 PRIMARY | Accurate Bushing Company, Inc. (USA) |
| ST4M205-5 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| CFH-400 | 5/1 Secondary reference U.S. Government activity |
| ST4M205-5 | 3/2 Design control — primary reference U.S. Government activity |
| CC52557 | 5/1 Secondary reference Rbc Aircraft Products, Inc. |
| CC52557 | 5/9 Secondary reference Timken Aerospace, Inc Dba Torrington Product |
| 10107512 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 3110-01-134-5871 is a Cam Follower,needle Bearing, manufactured by Rbc Aircraft Products, Inc., classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-134-5871 has 3 manufacturer part numbers on file: ST4M205-5 (Rbc Aircraft Products, Inc.), ST4M205-5 (Accurate Bushing Company, Inc.), ST4M205-5 (The Boeing Company Div Defense).
Key specifications for ST4M205-5: Bearing Seal Type: CONTACT; Lubrication Material: GREASE; Outer Ring Width: 0.4280 INCHES MINIMUM AND 0.4330 INCHES MAXIMUM IN; Thread Length: 0.3360 INCHES MINIMUM AND 0.3760 INCHES MAXIMUM IN. 25 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.