The Washer,lock, cataloged under National Stock Number 5310-01-679-4026, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Skf Usa Inc.. Government technical data includes 5 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 | 5310-01-679-4026 |
| Primary Part Number | MB31 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Skf Usa Inc. |
| Status | ACTIVE |
| Style Designator | COUNTERSINK EXTERNAL TEETH |
| Outside Diameter | 212.0 MILLIMETERS NOMINAL MM |
| Material Thickness | 2.5 MILLIMETERS NOMINAL MM |
| Countersink Angle | 25.0 DEGREES NOMINAL |
| Hole Diameter | 155.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| MB31 PRIMARY | Skf Usa Inc. (USA) |
NSN 5310-01-679-4026 is a Washer,lock, manufactured by Skf Usa Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-679-4026 has 1 manufacturer part number on file: MB31 (Skf Usa Inc.).
Key specifications for MB31: Style Designator: COUNTERSINK EXTERNAL TEETH; Outside Diameter: 212.0 MILLIMETERS NOMINAL MM; Material Thickness: 2.5 MILLIMETERS NOMINAL MM; Countersink Angle: 25.0 DEGREES NOMINAL. 5 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.