The Bearing,plain,rod End, cataloged under National Stock Number 3120-00-083-8917, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Mid-America Aerotech, Llc. Government technical data includes 21 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3120-00-083-8917 |
| Primary Part Number | 21918 |
| Item Name | Bearing,plain,rod End |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Mid-America Aerotech, Llc |
| Status | ACTIVE |
| Shank Thread Length | 3.1250 INCHES NOMINAL IN |
| Bore Center to Shank End Distance | 5.0300 INCHES NOMINAL IN |
| Inner Member Width | 0.9980 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Hardness Rating | 55.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM INNER MEMBER |
| Hardness Rating | 20.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM RACE INSERT |
| Outer Member Width | 0.7990 INCHES MINIMUM AND 0.8090 INCHES MAXIMUM IN |
| Style Designator | BALL TYPE |
| Thread Diameter | 1.250 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Shank Style | EXTERNALLY THREADED |
| Surface Treatment | CADMIUM ROD END BODY |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Static Radial Load Rating | 32200 POUNDS LBS |
| Bore Diameter | 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE RACE LINER |
| Material | STEEL COMP 440C INNER MEMBER |
| Material | STEEL COMP 4130 INTERNAL ROD END BODY |
| Material | STEEL COMP 631 OR STEEL COMP 630 RACE INSERT |
| Thread Series Designator | UNEF |
| Outer Member Outside Diameter | 2.5000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21918 PRIMARY | Mid-America Aerotech, Llc (USA) |
| Reference | Meaning |
|---|---|
| 21918 | 5/9 Secondary reference U.S. Government activity |
| 21918 | 5/9 Secondary reference E-Systems Inc Montek Div Fluid Controls Opns |
| 21918 | 5/9 Secondary reference Moog Inc Div Moog Inc., Space and Defense - Salt Lake City |
NSN 3120-00-083-8917 is a Bearing,plain,rod End, manufactured by Mid-America Aerotech, Llc, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-083-8917 has 1 manufacturer part number on file: 21918 (Mid-America Aerotech, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4720-00-729-6407. Verify interchangeability with system specifications before substitution.
Key specifications for 21918: Shank Thread Length: 3.1250 INCHES NOMINAL IN; Bore Center to Shank End Distance: 5.0300 INCHES NOMINAL IN; Inner Member Width: 0.9980 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN; Hardness Rating: 55.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM INNER MEMBER. 21 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.
NSN 3120-00-083-8917 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.