The Bearing,plain,rod End, cataloged under National Stock Number 3120-01-258-8558, 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 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-258-8558 |
| Primary Part Number | MM-16 |
| Item Name | Bearing,plain,rod End |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Timken Aurora Bearing Company |
| Status | ACTIVE |
| Shank Thread Length | 2.0940 INCHES MINIMUM AND 2.1870 INCHES MAXIMUM IN |
| Bore Center to Shank End Distance | 4.1050 INCHES MINIMUM AND 4.1450 INCHES MAXIMUM IN |
| Inner Member Width | 1.3700 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN |
| Outer Member Width | 0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN |
| Style Designator | BALL TYPE |
| Thread Diameter | 1.250 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Shank Style | EXTERNALLY THREADED |
| Surface Treatment | CHROMIUM INNER MEMBER |
| Surface Treatment | CADMIUM AND ZINC RACE INSERT |
| Surface Treatment | CADMIUM AND ZINC ROD END BODY |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Static Radial Load Rating | 43541 POUNDS LBS |
| Bore Diameter | 0.9995 INCHES MINIMUM AND 1.0035 INCHES MAXIMUM IN |
| Material | STEEL INNER MEMBER |
| Material | STEEL COMP 4130 ROD END BODY |
| Material | STEEL RACE INSERT |
| Thread Series Designator | UNF |
| Outer Member Outside Diameter | 2.7300 INCHES MINIMUM AND 2.7700 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 |
|---|---|
| MM-16 PRIMARY | Timken Aurora Bearing Company (USA) |
| Reference | Meaning |
|---|---|
| 52B10145-4 | 5/9 Secondary reference Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba |
NSN 3120-01-258-8558 is a Bearing,plain,rod End, manufactured by Timken Aurora Bearing Company, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-258-8558 has 1 manufacturer part number on file: MM-16 (Timken Aurora Bearing Company).
1 possible match (shared part number, not a government interchangeability claim): 7010-01-544-4665. Verify interchangeability with system specifications before substitution.
Key specifications for MM-16: Shank Thread Length: 2.0940 INCHES MINIMUM AND 2.1870 INCHES MAXIMUM IN; Bore Center to Shank End Distance: 4.1050 INCHES MINIMUM AND 4.1450 INCHES MAXIMUM IN; Inner Member Width: 1.3700 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN; Outer Member Width: 0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN. 20 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.