The Washer,lock, cataloged under National Stock Number 5310-01-690-5679, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Endries International, Inc. Dba Servtonics, an Endries International, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-690-5679 |
| Primary Part Number | 0204SMCA-ZZZZ |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Endries International, Inc. Dba Servtonics, an Endries International, Inc. |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.209 INCHES MAXIMUM IN |
| Material Thickness | 0.025 INCHES MINIMUM IN |
| Material | STEEL PROPERTY CLASS 18.8 OVERALL |
| Hole Diameter | 0.114 INCHES MINIMUM AND 0.120 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 |
|---|---|
| 0204SMCA-ZZZZ PRIMARY | Endries International, Inc. Dba Servtonics, an Endries International, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3-900-391 | 7/2 Vendor item drawing reference Anritsu Company |
NSN 5310-01-690-5679 is a Washer,lock, manufactured by Endries International, Inc. Dba Servtonics, an Endries International, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-690-5679 has 1 manufacturer part number on file: 0204SMCA-ZZZZ (Endries International, Inc. Dba Servtonics, an Endries International, Inc.).
Key specifications for 0204SMCA-ZZZZ: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.209 INCHES MAXIMUM IN; Material Thickness: 0.025 INCHES MINIMUM IN; Part Name Assigned by Controlling Agency: SPLIT LOCK WASHER NO.4. 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.