The Washer,concave, cataloged under National Stock Number 5310-01-378-9164, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-378-9164 |
| Primary Part Number | DAA7227D027-001 |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35,TYPE 2 FED SPEC 1ST TREATMENT RESPONSE OVERALL |
| Radius | 3.250 INCHES NOMINAL IN |
| Style Designator | CONCAVE |
| Material Document and Classification | BAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 5.000 INCHES NOMINAL IN |
| Recess Depth | 1.000 INCHES NOMINAL IN |
| Material Thickness | 1.370 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.766 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 |
|---|---|
| DAA7227D027-001 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| DAA7227D027-001 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
NSN 5310-01-378-9164 is a Washer,concave, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-378-9164 has 2 manufacturer part numbers on file: DAA7227D027-001 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), DAA7227D027-001 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems).
Key specifications for DAA7227D027-001: Surface Treatment Document and Classification: QQ-P-35,TYPE 2 FED SPEC 1ST TREATMENT RESPONSE OVERALL; Radius: 3.250 INCHES NOMINAL IN; Style Designator: CONCAVE; Material Document and Classification: BAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 10 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.