The Washer,flat, cataloged under National Stock Number 5310-01-533-9109, 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 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-533-9109 |
| Primary Part Number | 88-20033-42A |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Department of Defense Project Manager-Mobile Electric Power |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B 633, SC 3, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.375 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A 108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A 109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.562 INCHES NOMINAL IN |
| Thickness | 0.109 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 |
|---|---|
| 88-20033-42A PRIMARY | Department of Defense Project Manager-Mobile Electric Power (USA) |
| Reference | Meaning |
|---|---|
| 88-20033-42A | 5/9 Secondary reference Valtronic Corp the |
NSN 5310-01-533-9109 is a Washer,flat, manufactured by Department of Defense Project Manager-Mobile Electric Power, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-533-9109 has 1 manufacturer part number on file: 88-20033-42A (Department of Defense Project Manager-Mobile Electric Power).
Key specifications for 88-20033-42A: Surface Treatment Document and Classification: ASTM B 633, SC 3, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.375 INCHES NOMINAL IN; Material Document and Classification: ASTM A 108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A 109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.