The Washer,flat, cataloged under National Stock Number 5310-01-228-6834, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-228-6834 |
| Primary Part Number | 350-0513-000 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc |
| Status | ACTIVE |
| Overall Diameter | 1.090 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN |
| Hardness Rating | 44.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | SAE1060-1090 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PHOSPHATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.789 INCHES MINIMUM AND 0.799 INCHES MAXIMUM IN |
| Thickness | 0.0765 INCHES MINIMUM AND 0.0782 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 |
|---|---|
| 350-0513-000 PRIMARY | Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 5900-78 | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
| 5900-78 | C/1 Advisory reference — outside the item-of-supply concept Rotor Clip Company, Inc. |
NSN 5310-01-228-6834 is a Washer,flat, manufactured by Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-228-6834 has 1 manufacturer part number on file: 350-0513-000 (Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc).
Key specifications for 350-0513-000: Overall Diameter: 1.090 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN; Hardness Rating: 44.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM; Material Document and Classification: SAE1060-1090 ASSN STD 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.