The Washer,flat, cataloged under National Stock Number 5310-00-847-9183, 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. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-847-9183 |
| Primary Part Number | A51C13220-11 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416 TYPE 2 CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.937 INCHES NOMINAL IN |
| Material Document and Classification | AMS 6349 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 4340 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.344 INCHES NOMINAL IN |
| Thickness | 0.095 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 |
|---|---|
| A51C13220-11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51C13220-11 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51C13220-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5310-00-847-9183 is a Washer,flat, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-847-9183 has 1 manufacturer part number on file: A51C13220-11 (Northrop Grumman Systems Corporation).
Key specifications for A51C13220-11: Surface Treatment Document and Classification: QQ-P-416 TYPE 2 CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.937 INCHES NOMINAL IN; Material Document and Classification: AMS 6349 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.