The Bearing,plain,spherical, cataloged under National Stock Number 3120-00-352-7645, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 5 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3120-00-352-7645 |
| Primary Part Number | 4020640 |
| Item Name | Bearing,plain,spherical |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Extension Outside Diameter | 0.6400 INCHES MINIMUM AND 0.6500 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5663 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.4480 INCHES MINIMUM AND 0.4490 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY OVERALL |
| Spherical Body Diameter | 0.8790 INCHES MINIMUM AND 0.8795 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 |
|---|---|
| 4020640 | Kito Mfg Co. Ltd (JPN) |
| 4020640 | A.w. Mack Manufacturing Co., Inc. (USA) |
| 4020640 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 4020640 | 5/9 Secondary reference Kito Mfg Co. Ltd |
| 4020640 | 5/9 Secondary reference Dempler Co |
| 4020640 | 5/9 Secondary reference Barnes Group Inc. Div Windsor Division |
| 4020640 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 4020640 | 5/9 Secondary reference Cecilware Corporation |
NSN 3120-00-352-7645 is a Bearing,plain,spherical, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-352-7645 has 3 manufacturer part numbers on file: 4020640 (Kito Mfg Co. Ltd), 4020640 (A.w. Mack Manufacturing Co., Inc.), 4020640 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4020640: Extension Outside Diameter: 0.6400 INCHES MINIMUM AND 0.6500 INCHES MAXIMUM IN; Material Document and Classification: AMS 5663 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Overall Length: 0.6150 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN; Body Inside Diameter: 0.4480 INCHES MINIMUM AND 0.4490 INCHES MAXIMUM IN. 5 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.