The Cam Follower,needle Bearing, cataloged under National Stock Number 3110-01-183-1201, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3110-01-183-1201 |
| Primary Part Number | 4M275-28 |
| Item Name | Cam Follower,needle Bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Bearing Seal Type | CONTACT |
| Lubrication Material | GREASE |
| Outer Ring Width | 0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE EXPOSED SURFACES AS MOUNTED |
| Surface Treatment Document and Classification | QQ-C-320,CL 2 FED SPEC SINGLE TREATMENT RESPONSE ROLLER |
| Thread Length | 0.8750 INCHES MINIMUM IN |
| Style Designator | CAM FOLLOWER |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OUTER RING |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE ROLLER |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Material Document and Classification | L-P-392 FED SPEC 1ST MATERIAL RESPONSE OR L-P-410 FED SPEC 2ND MATERIAL RESPONSE SEAL |
| Overall Outside Diameter | 1.7495 INCHES MINIMUM AND 1.7520 INCHES MAXIMUM IN |
| Features Provided | LUBRICATION HOLE AND LUBRICATION GROOVE |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.000 INCHES IN |
| Stud Length | 1.7340 INCHES MINIMUM AND 1.7660 INCHES MAXIMUM IN |
| Alignment Type | RIGID |
| Surface Treatment | CADMIUM EXPOSED SURFACES AS MOUNTED |
| Surface Treatment | CHROMIUM ROLLER |
| Seal Quantity | 2 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL COMP E52100 ROLLER |
| Material | STEEL END PLATE |
| Material | STEEL COMP E52100 OUTER RING |
| Material | PLASTIC ACETAL OR PLASTIC POLYAMIDE NYLON SEAL |
| Material | STEEL COMP E52100 STUD |
| Thread Series Designator | UNS |
| 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 |
|---|---|
| 4M275-28 | Rbc Aircraft Products, Inc. (USA) |
| 4M275-28 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 4M275-28 | 3/2 Design control — primary reference U.S. Government activity |
| CRHSB-28CP | 5/9 Secondary reference Timken Aerospace, Inc Dba Torrington Product |
| CFH1-3/4SB-CP | 5/1 Secondary reference U.S. Government activity |
| CRHSB-28CP | C/1 Advisory reference — outside the item-of-supply concept Timken Co Div the Timken Company |
| CRHSB-28CP | 5/1 Secondary reference Rbc Aircraft Products, Inc. |
NSN 3110-01-183-1201 is a Cam Follower,needle Bearing, manufactured by The Boeing Company Div Defense, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-183-1201 has 2 manufacturer part numbers on file: 4M275-28 (Rbc Aircraft Products, Inc.), 4M275-28 (The Boeing Company Div Defense).
Key specifications for 4M275-28: Bearing Seal Type: CONTACT; Lubrication Material: GREASE; Outer Ring Width: 0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE EXPOSED SURFACES AS MOUNTED. 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.