The Retainer,support Track Bearing, cataloged under National Stock Number 1560-00-075-8983, is classified within Federal Supply Class 1560 (Airframe Structural Components) of the Aircraft and Airframe Components group. The manufacturer of record is Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1560-00-075-8983 |
| Primary Part Number | 3F21138-101 |
| Item Name | Retainer,support Track Bearing |
| FSC / FSG | 1560 / 15 — Airframe Structural Components |
| Manufacturer | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,4130 COND F-4,MIL-S-6758,2.320 IN. LG,1.375 IN. O/A DIA,ONE END THREADED WITH 5/16-24 UNF 3A THD A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3F21138-101 | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc (USA) |
| Reference | Meaning |
|---|---|
| F3F21138-101 | 5/2 Secondary reference U.S. Government activity |
| 3F21138-101 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1560-00-075-8983 is a Retainer,support Track Bearing, manufactured by Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc, classified under FSC 1560, Airframe Structural Components. Status: active.
NSN 1560-00-075-8983 has 1 manufacturer part number on file: 3F21138-101 (Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc).
Key specifications for 3F21138-101: General Characteristics Item Description: STEEL,4130 COND F-4,MIL-S-6758,2.320 IN. LG,1.375 IN. O/A DIA,ONE END THREADED WITH 5/16-24 UNF 3A THD A. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.