The Washer,key, cataloged under National Stock Number 5310-00-027-4718, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Trego Inc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-027-4718 |
| Primary Part Number | 557377 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Trego Inc |
| Status | ACTIVE |
| Distance From Centerline to Inside of Prebent Key | 0.879 INCHES NOMINAL IN |
| Internal Prebent Key Width | 0.255 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 2.470 INCHES NOMINAL IN |
| Material Thickness | 0.265 INCHES NOMINAL IN |
| Internal Prebent Key Length | 0.204 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 1.820 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 |
|---|---|
| 557377 | Trego Inc (USA) |
| 557377 | Satellite Aerospace, Incorporated Dba Satellite Aerospace Inc (USA) |
| 557377 | Enjet Aero Manchester Llc (USA) |
| Reference | Meaning |
|---|---|
| 557377 | C/1 Advisory reference — outside the item-of-supply concept Paradigm Manchester Inc. Dba Pursuit Aerospace |
| 557377 | 5/9 Secondary reference Gould E a and Co |
| 557377 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 557377 | 5/9 Secondary reference Dynamic Gunver Technologies Llc |
| 557377 | 3/9 Design control — primary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 5310-00-027-4718 is a Washer,key, manufactured by Trego Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-027-4718 has 3 manufacturer part numbers on file: 557377 (Trego Inc), 557377 (Satellite Aerospace, Incorporated Dba Satellite Aerospace Inc), 557377 (Enjet Aero Manchester Llc).
Key specifications for 557377: Distance From Centerline to Inside of Prebent Key: 0.879 INCHES NOMINAL IN; Internal Prebent Key Width: 0.255 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 2.470 INCHES NOMINAL IN. 8 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.