The Washer,flat, cataloged under National Stock Number 5310-01-436-9980, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mistras Group, Inc. Dba Mistras Div Physical Acoustics; Ndt Automation; Vibrametrics. Government technical data includes 6 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 | 5310-01-436-9980 |
| Primary Part Number | 9500-6340 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mistras Group, Inc. Dba Mistras Div Physical Acoustics; Ndt Automation; Vibrametrics |
| Status | ACTIVE |
| Overall Diameter | 0.680 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.380 INCHES NOMINAL IN |
| Thickness | 0.062 INCHES NOMINAL 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 |
|---|---|
| 9500-6340 PRIMARY | Mistras Group, Inc. Dba Mistras Div Physical Acoustics; Ndt Automation; Vibrametrics (USA) |
NSN 5310-01-436-9980 is a Washer,flat, manufactured by Mistras Group, Inc. Dba Mistras Div Physical Acoustics; Ndt Automation; Vibrametrics, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-436-9980 has 1 manufacturer part number on file: 9500-6340 (Mistras Group, Inc. Dba Mistras Div Physical Acoustics; Ndt Automation; Vibrametrics).
Key specifications for 9500-6340: Overall Diameter: 0.680 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Part Name Assigned by Controlling Agency: NAVY SPECIAL PROJECT. 6 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.