The Washer,lock, cataloged under National Stock Number 5310-01-533-5198, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Department of Defense Project Manager-Mobile Electric Power. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-533-5198 |
| Primary Part Number | 88-20556-8 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Department of Defense Project Manager-Mobile Electric Power |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | ASME B18.21.1, UNS G10600 THRU G10800 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 0.776 INCHES MAXIMUM IN |
| Material Thickness | 0.109 INCHES MINIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.440 INCHES MINIMUM AND 0.450 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 |
|---|---|
| 88-20556-8 PRIMARY | Department of Defense Project Manager-Mobile Electric Power (USA) |
| Reference | Meaning |
|---|---|
| 88-20556 | D/9 Drawing number reference only Department of Defense Project Manager-Mobile Electric Power |
NSN 5310-01-533-5198 is a Washer,lock, manufactured by Department of Defense Project Manager-Mobile Electric Power, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-533-5198 has 1 manufacturer part number on file: 88-20556-8 (Department of Defense Project Manager-Mobile Electric Power).
Key specifications for 88-20556-8: Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: ASME B18.21.1, UNS G10600 THRU G10800 ASSN STD ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 0.776 INCHES MAXIMUM IN; Material Thickness: 0.109 INCHES MINIMUM IN. 7 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.