The Cam Follower,needle Bearing, cataloged under National Stock Number 3110-01-301-7893, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Accurate Bushing Company, Inc.. Government technical data includes 21 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-301-7893 |
| Primary Part Number | CR-1 1/4-XB-172 |
| Item Name | Cam Follower,needle Bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Accurate Bushing Company, Inc. |
| Status | ACTIVE |
| Bearing Seal Type | CONTACT |
| Lubrication Material | LUBRICANT |
| Outer Ring Width | 0.7450 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Thread Length | 0.6250 INCHES MINIMUM IN |
| Style Designator | CAM FOLLOWER |
| Overall Outside Diameter | 1.2490 INCHES MINIMUM AND 1.2500 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Stud Length | 1.2500 INCHES NOMINAL IN |
| Surface Treatment | OXIDE EXPOSED SURFACES AS MOUNTED |
| Seal Quantity | 2 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OUTER RING |
| Material | STEEL INNER RING |
| Material | STEEL STUD |
| Material | STEEL ROLLER |
| Material | PLASTIC POLYAMIDE NYLON SEAL |
| Material | RESIN SYNTHETIC WASHER |
| Thread Series Designator | UNF |
| Stud Diameter | 0.5000 INCHES MINIMUM AND 0.5010 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 |
|---|---|
| CRSB-20 | Timken Co Div the Timken Company (USA) |
| CR-1 1/4-XB-172 PRIMARY | Accurate Bushing Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| CRSB-20 | 5/9 Secondary reference Timken Aerospace, Inc Dba Torrington Product |
| CF-1 1/4SB | 3/2 Design control — primary reference U.S. Government activity |
| CF-1.25-SB | 5/9 Secondary reference U.S. Government activity |
NSN 3110-01-301-7893 is a Cam Follower,needle Bearing, manufactured by Accurate Bushing Company, Inc., classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-301-7893 has 2 manufacturer part numbers on file: CRSB-20 (Timken Co Div the Timken Company), CR-1 1/4-XB-172 (Accurate Bushing Company, Inc.).
Key specifications for CR-1 1/4-XB-172: Bearing Seal Type: CONTACT; Lubrication Material: LUBRICANT; Outer Ring Width: 0.7450 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Thread Length: 0.6250 INCHES MINIMUM IN. 21 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.