The Washer,flat, cataloged under National Stock Number 5310-00-001-9031, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Brp Us Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-001-9031 |
| Primary Part Number | 306433 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Brp Us Inc |
| Status | ACTIVE |
| Overall Diameter | 0.742 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4505 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY 260 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Thickness | 0.025 INCHES MINIMUM AND 0.030 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 |
|---|---|
| 306433 | Lewmar Ltd (GBR) |
| 306433 PRIMARY | Brp Us Inc (USA) |
| Reference | Meaning |
|---|---|
| 306433 | 5/9 Secondary reference Evinrude Motors Product Group of Outboard Marine Corp |
| 306433 | 5/9 Secondary reference Outboard Marine Corp Johnson Motors Div |
| 306433 | 5/9 Secondary reference Simpson-Lawrence Ltd Johnson and Evi Rude Outboard Motors |
| 306433 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-001-9031 is a Washer,flat, manufactured by Brp Us Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-001-9031 has 2 manufacturer part numbers on file: 306433 (Lewmar Ltd), 306433 (Brp Us Inc).
Key specifications for 306433: Overall Diameter: 0.742 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN; Material Document and Classification: AMS 4505 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: CADMIUM 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.