The Bearing,sleeve, cataloged under National Stock Number 3120-01-490-7640, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-490-7640 |
| Primary Part Number | 5544188 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | CHAMFERED LEFT FLANGE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | ROUND LEFT FLANGE BODY CORNER |
| Flange Outside Diameter | 1.5600 INCHES MINIMUM AND 1.5604 INCHES MAXIMUM IN |
| Body Outside Diameter | 1.2390 INCHES MINIMUM AND 1.2440 INCHES MAXIMUM IN |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | ASTM-A322 ASSN STD ALL MATERIAL RESPONSES AND ASTM-A331 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Body Inside Diameter | 0.9390 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Flange Width | 0.2700 INCHES NOMINAL IN |
| Material | STEEL COMP 4140 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3120-01-490-7640 is a Bearing,sleeve, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-490-7640 has 2 manufacturer part numbers on file: 5544188 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems), 5544188 (Naval Sea Systems Command).
Key specifications for 5544188: Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: CHAMFERED LEFT FLANGE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER. 14 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.