The Washer,flat, cataloged under National Stock Number 5310-01-443-9846, 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 Div Marine Systems. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-443-9846 |
| Primary Part Number | 3370C28H02 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Div Marine Systems |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416, TY 2 CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.540 INCHES MINIMUM AND 1.580 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN |
| Thickness | 0.093 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 |
|---|---|
| 3370C28H02 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
NSN 5310-01-443-9846 is a Washer,flat, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-443-9846 has 1 manufacturer part number on file: 3370C28H02 (Northrop Grumman Systems Corporation Div Marine Systems).
Key specifications for 3370C28H02: Surface Treatment Document and Classification: QQ-P-416, TY 2 CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.540 INCHES MINIMUM AND 1.580 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-698 FED SPEC 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.