The Washer,flat, cataloged under National Stock Number 5310-01-119-3154, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lamson and Sessions Co the. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-119-3154 |
| Primary Part Number | WA1766 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lamson and Sessions Co the |
| Status | ACTIVE |
| Overall Diameter | 1.307 INCHES MINIMUM AND 1.317 INCHES MAXIMUM IN |
| Heat Treatment | QUENCHED AND TEMPERED |
| Hardness Rating | 82.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 85.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM IN |
| Thickness | 0.114 INCHES MINIMUM AND 0.121 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 |
|---|---|
| WA1766 PRIMARY | Lamson and Sessions Co the (USA) |
| Reference | Meaning |
|---|---|
| 4820062-0 | 5/9 Secondary reference Agco Corp Parts Opn |
| 74820062-0 | 3/9 Design control — primary reference Agco Corp Parts Opn |
NSN 5310-01-119-3154 is a Washer,flat, manufactured by Lamson and Sessions Co the, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-119-3154 has 1 manufacturer part number on file: WA1766 (Lamson and Sessions Co the).
Key specifications for WA1766: Overall Diameter: 1.307 INCHES MINIMUM AND 1.317 INCHES MAXIMUM IN; Heat Treatment: QUENCHED AND TEMPERED; Hardness Rating: 82.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 85.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR. 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.