The Washer,flat, cataloged under National Stock Number 5310-01-598-8948, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-598-8948 |
| Primary Part Number | 97022A382 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Overall Diameter | 0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN |
| Hardness Rating | 85.0 ROCKWELL B NOMINAL |
| Material Document and Classification | ASTM A240 ASSN STD 1ST MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 316 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.625 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN |
| Thickness | 0.009 INCHES MINIMUM AND 0.011 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 |
|---|---|
| 97022A382 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 10378563 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-598-8948 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-598-8948 has 1 manufacturer part number on file: 97022A382 (Mcmaster-Carr Supply Co).
Key specifications for 97022A382: Overall Diameter: 0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN; Hardness Rating: 85.0 ROCKWELL B NOMINAL; Material Document and Classification: ASTM A240 ASSN STD 1ST MATERIAL RESPONSE OVERALL; 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.