The Washer,lock, cataloged under National Stock Number 5310-01-698-0855, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Engineered Components Co. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-698-0855 |
| Primary Part Number | 500K1950-2 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Engineered Components Co |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633,SC 2, TY III ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | ASTM A569 OR EQUIV ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.293 INCHES MAXIMUM IN |
| Material Thickness | 0.040 INCHES MINIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.167 INCHES MINIMUM AND 0.174 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 |
|---|---|
| 500K1950-2 PRIMARY | Engineered Components Co (USA) |
| Reference | Meaning |
|---|---|
| 500K1950-2 | 7/2 Vendor item drawing reference U.S. Government activity |
| 500K1950-2 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 500K1950 | D/9 Drawing number reference only Drs Environmental Systems Inc |
NSN 5310-01-698-0855 is a Washer,lock, manufactured by Engineered Components Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-698-0855 has 1 manufacturer part number on file: 500K1950-2 (Engineered Components Co).
Key specifications for 500K1950-2: Surface Treatment Document and Classification: ASTM B633,SC 2, TY III ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: ASTM A569 OR EQUIV ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.293 INCHES MAXIMUM IN. 8 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.