The Washer,flat, cataloged under National Stock Number 5310-01-561-8690, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-561-8690 |
| Primary Part Number | 98017A220 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Surface Treatment Document and Classification | WW-F-92 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.312 INCHES NOMINAL IN |
| Supplementary Features | REFERENCE SPEC IS AN960-C1216 |
| Material Document and Classification | FF-W-92 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.765 INCHES NOMINAL IN |
| Thickness | 0.085 INCHES MINIMUM AND 0.095 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 |
|---|---|
| 98017A220 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-561-8690 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-561-8690 has 1 manufacturer part number on file: 98017A220 (Mcmaster-Carr Supply Co).
Key specifications for 98017A220: Surface Treatment Document and Classification: WW-F-92 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.312 INCHES NOMINAL IN; Supplementary Features: REFERENCE SPEC IS AN960-C1216; Material Document and Classification: FF-W-92 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.