The Washer,flat, cataloged under National Stock Number 5310-01-574-4388, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-574-4388 |
| Primary Part Number | 91117A219 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Center Hole Width | 0.406 INCHES NOMINAL IN |
| End Cut Angle | 90.0 DEGREES NOMINAL |
| Length | 2.000 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC OVERALL |
| Asbestos Content Percentage | 0.0 NOMINAL |
| Peripheral Shape Style | ROUND |
| Width | 2.000 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Thickness | 0.113 INCHES MINIMUM AND 0.137 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 |
|---|---|
| 91117A219 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 91117A219 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-574-4388 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-574-4388 has 1 manufacturer part number on file: 91117A219 (Mcmaster-Carr Supply Co).
Key specifications for 91117A219: Center Hole Width: 0.406 INCHES NOMINAL IN; End Cut Angle: 90.0 DEGREES NOMINAL; Length: 2.000 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR. 11 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.