The Bearing,plain,rod End, cataloged under National Stock Number 3120-01-331-9761, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Timken Aurora Bearing Company. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-331-9761 |
| Primary Part Number | SM-12 |
| Item Name | Bearing,plain,rod End |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Timken Aurora Bearing Company |
| Status | ACTIVE |
| Shank Thread Length | 1.7190 INCHES MINIMUM AND 1.8120 INCHES MAXIMUM IN |
| Bore Center to Shank End Distance | 2.8600 INCHES MINIMUM AND 2.8900 INCHES MAXIMUM IN |
| Inner Member Width | 0.8700 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN |
| Outer Member Width | 0.6820 INCHES MINIMUM AND 0.6920 INCHES MAXIMUM IN |
| Style Designator | BALL TYPE |
| Thread Diameter | 0.7500 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Shank Style | EXTERNALLY THREADED |
| Surface Treatment | CHROMATE INNER MEMBER |
| Surface Treatment | NICKEL ROD END BODY |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Bore Diameter | 0.7495 INCHES MINIMUM AND 0.7515 INCHES MAXIMUM IN |
| Material | STEEL INNER MEMBER |
| Material | STEEL CORROSION RESISTING RACE INSERT |
| Material | STEEL ROD END BODY |
| Thread Series Designator | UNF |
| Outer Member Outside Diameter | 1.7400 INCHES MINIMUM AND 1.7600 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 |
|---|---|
| SM-12 PRIMARY | Timken Aurora Bearing Company (USA) |
| 23038591-1 | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| ARE-12SS | C/1 Advisory reference — outside the item-of-supply concept Morse Industrial Corp Sealmaster Bearing Div Sub of Emerson Electric Co |
NSN 3120-01-331-9761 is a Bearing,plain,rod End, manufactured by Timken Aurora Bearing Company, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-331-9761 has 2 manufacturer part numbers on file: SM-12 (Timken Aurora Bearing Company), 23038591-1 (Rolls-Royce Corporation).
3 possible matches (shared part number, not a government interchangeability claim): 5120-01-348-9096, 5340-01-384-2985, 5961-01-519-0873. Verify interchangeability with system specifications before substitution.
Key specifications for SM-12: Shank Thread Length: 1.7190 INCHES MINIMUM AND 1.8120 INCHES MAXIMUM IN; Bore Center to Shank End Distance: 2.8600 INCHES MINIMUM AND 2.8900 INCHES MAXIMUM IN; Inner Member Width: 0.8700 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN; Outer Member Width: 0.6820 INCHES MINIMUM AND 0.6920 INCHES MAXIMUM IN. 18 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.