The Wrench,bearing Retainer, cataloged under National Stock Number 4920-00-731-7973, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is De Havilland Aircraft of Canada Limited. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4920-00-731-7973 |
| Primary Part Number | SD5619-1 |
| Item Name | Wrench,bearing Retainer |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| General Characteristics Item Description | CHROME-MOLY STEEL,5.065 IN. LG,1.450 IN. W,0.500 IN. H 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 |
|---|---|
| SD5619-1 PRIMARY | De Havilland Aircraft of Canada Limited (CAN) |
| Reference | Meaning |
|---|---|
| A1812 | 5/9 Secondary reference Amsco Inc |
| 4920AC1-000 | 5/2 Secondary reference U.S. Government activity |
NSN 4920-00-731-7973 is a Wrench,bearing Retainer, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-00-731-7973 has 1 manufacturer part number on file: SD5619-1 (De Havilland Aircraft of Canada Limited).
3 possible matches (shared part number, not a government interchangeability claim): 4730-00-812-0924, 5330-01-177-8348, 5307-01-604-1349. Verify interchangeability with system specifications before substitution.
Key specifications for SD5619-1: General Characteristics Item Description: CHROME-MOLY STEEL,5.065 IN. LG,1.450 IN. W,0.500 IN. H IN; End Item Identification: U/O DHC-4 AND AC-1,NHA C4GT1000. 1 specification is 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.