The Washer,flat, cataloged under National Stock Number 5310-00-856-3158, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is De Havilland Aircraft of Canada Limited. Government technical data includes 9 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 | 5310-00-856-3158 |
| Primary Part Number | CSP73-6 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| Overall Diameter | 0.813 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-362 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PHOSPHATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.316 INCHES NOMINAL IN |
| Thickness | 0.032 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 |
|---|---|
| CSP73-6 PRIMARY | De Havilland Aircraft of Canada Limited (CAN) |
NSN 5310-00-856-3158 is a Washer,flat, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-856-3158 has 1 manufacturer part number on file: CSP73-6 (De Havilland Aircraft of Canada Limited).
Key specifications for CSP73-6: Overall Diameter: 0.813 INCHES NOMINAL IN; Material Document and Classification: QQ-A-362 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PHOSPHATE 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.