The Bearing,plain,rod End, cataloged under National Stock Number 3120-00-005-0091, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Mercury Tool and Mfg Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-00-005-0091 |
| Primary Part Number | A51G20543 |
| Item Name | Bearing,plain,rod End |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Mercury Tool and Mfg Corp |
| Status | ACTIVE |
| Shank Thread Length | 1.3750 INCHES NOMINAL IN |
| Bore Center to Shank End Distance | 2.2500 INCHES NOMINAL IN |
| Inner Member Width | 0.3730 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN |
| Outer Member Width | 0.2860 INCHES MINIMUM AND 0.2910 INCHES MAXIMUM IN |
| Style Designator | BALL TYPE |
| Thread Direction | RIGHT-HAND |
| Shank Style | EXTERNALLY THREADED |
| Thread Class | 3A A |
| Test Data Document | 81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Bore Diameter | 0.3120 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN |
| Outer Member Outside Diameter | 1.0000 INCHES NOMINAL 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 |
|---|---|
| A51G20543 | Mercury Tool and Mfg Corp (USA) |
| Reference | Meaning |
|---|---|
| A51G20543 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51G20543 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
| A51G20543 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 3120-00-005-0091 is a Bearing,plain,rod End, manufactured by Mercury Tool and Mfg Corp, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-005-0091 has 1 manufacturer part number on file: A51G20543 (Mercury Tool and Mfg Corp).
Key specifications for A51G20543: Shank Thread Length: 1.3750 INCHES NOMINAL IN; Bore Center to Shank End Distance: 2.2500 INCHES NOMINAL IN; Inner Member Width: 0.3730 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN; Outer Member Width: 0.2860 INCHES MINIMUM AND 0.2910 INCHES MAXIMUM IN. 11 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.