The Washer,flat, cataloged under National Stock Number 5310-01-347-3770, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-347-3770 |
| Primary Part Number | 03A257-6A |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| Status | ACTIVE |
| Overall Diameter | 0.691 INCHES MINIMUM AND 0.701 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS5737 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5732 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5596 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5662 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ALUMINUM ALLOY OVERALL |
| Peripheral Shape Style | ROUND |
| Material | IRON ALLOY 660 OR NICKEL ALLOY 718 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.376 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Thickness | 0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM 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 |
|---|---|
| AS19879-6A | Anillo Industries Llc (USA) |
| 03A257-6A PRIMARY | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| MM118-6A | Moeller Manufacturing & Supply, Llc (USA) |
| VN948BF6 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 03A257-6A | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| VN948BF6 | 5/9 Secondary reference U.S. Government activity |
| NS202860-6A | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-347-3770 is a Washer,flat, manufactured by Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-347-3770 has 4 manufacturer part numbers on file: AS19879-6A (Anillo Industries Llc), 03A257-6A (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), MM118-6A (Moeller Manufacturing & Supply, Llc), VN948BF6 (Howmet Global Fastening Systems Inc).
Key specifications for 03A257-6A: Overall Diameter: 0.691 INCHES MINIMUM AND 0.701 INCHES MAXIMUM IN; Material Document and Classification: AMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS5737 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5732 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5596 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5662 ASSN STD 2ND MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: ALUMINUM ALLOY OVERALL. 9 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.