The Washer,flat, cataloged under National Stock Number 5310-01-516-3411, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Ry Ferner Co Inc Dba Metric Screw and Tool. Government technical data includes 8 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 | 5310-01-516-3411 |
| Primary Part Number | 236-8021P3 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Ry Ferner Co Inc Dba Metric Screw and Tool |
| Status | ACTIVE |
| Overall Diameter | 6.600 INCHES MINIMUM AND 7.000 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 304 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 3.200 INCHES MINIMUM AND 3.380 INCHES MAXIMUM IN |
| Thickness | 0.450 INCHES MINIMUM AND 0.550 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 |
|---|---|
| 236-8021P3 PRIMARY | The Ry Ferner Co Inc Dba Metric Screw and Tool (USA) |
| 236-8021P3 | Raytheon Canada Limited (CAN) |
NSN 5310-01-516-3411 is a Washer,flat, manufactured by The Ry Ferner Co Inc Dba Metric Screw and Tool, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-516-3411 has 2 manufacturer part numbers on file: 236-8021P3 (The Ry Ferner Co Inc Dba Metric Screw and Tool), 236-8021P3 (Raytheon Canada Limited).
Key specifications for 236-8021P3: Overall Diameter: 6.600 INCHES MINIMUM AND 7.000 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PASSIVATE OVERALL; Peripheral Shape Style: ROUND. 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.