The Bearing Unit,ball, cataloged under National Stock Number 3130-01-218-3397, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Skf Usa Inc.. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3130-01-218-3397 |
| Primary Part Number | FT1FM |
| Item Name | Bearing Unit,ball |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Skf Usa Inc. |
| Status | ACTIVE |
| Seal Type | CONTACT |
| Assembly Overall Length | 1.250 INCHES NOMINAL IN |
| Internal Fit-Up Designation | STANDARD |
| Flange Thickness | 0.166 INCHES NOMINAL IN |
| Mounting Hole Type | SQUARE |
| Rotating Element Locking Method | SETSCREW LOCKING COLLAR |
| Seal Location | BOTH ENDS |
| Block Type | FIXED |
| Style Designator | FLANGE BLOCK |
| Collar Location | ONE END |
| Overall Outside Diameter | 3.750 INCHES NOMINAL IN |
| Mounting Hole Width | 0.344 INCHES NOMINAL IN |
| Alignment Type | SELF-ALIGNING |
| Rolling Element Groove Quantity | 1 |
| Bolt Circle Diameter | 3.000 INCHES NOMINAL IN |
| Shaft End Type | OPEN |
| Bore Diameter | 1.0000 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC SEAL |
| Material | STEEL HOUSING |
| Material | STEEL BEARING |
| Housing Length | 0.625 INCHES NOMINAL IN |
| Housing Diameter | 2.797 INCHES NOMINAL IN |
| Load Capability Type | RADIAL AND THRUST |
| 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 |
|---|---|
| FT1FM PRIMARY | Skf Usa Inc. (USA) |
| 51-708-H PIECE 25 | Continental Emsco Co Skagit Products Div (USA) |
| Reference | Meaning |
|---|---|
| FTP-100 | 5/9 Secondary reference Skf Usa Inc. |
NSN 3130-01-218-3397 is a Bearing Unit,ball, manufactured by Skf Usa Inc., classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-218-3397 has 2 manufacturer part numbers on file: FT1FM (Skf Usa Inc.), 51-708-H PIECE 25 (Continental Emsco Co Skagit Products Div).
Key specifications for FT1FM: Seal Type: CONTACT; Assembly Overall Length: 1.250 INCHES NOMINAL IN; Internal Fit-Up Designation: STANDARD; Flange Thickness: 0.166 INCHES NOMINAL IN. 23 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.