The Washer,flat, cataloged under National Stock Number 5310-01-142-5347, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sje Inc. Dba San Juan Engineering & Mfg 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-142-5347 |
| Primary Part Number | SSBN409-4398579PC7 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sje Inc. Dba San Juan Engineering & Mfg Co |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES ALL SURFACES |
| Overall Diameter | 3.438 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC, POLYETHYLENE (PP) OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.815 INCHES MINIMUM AND 1.820 INCHES MAXIMUM IN |
| Thickness | 0.240 INCHES MINIMUM AND 0.245 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 |
|---|---|
| SSBN409-4398579PC7 PRIMARY | Sje Inc. Dba San Juan Engineering & Mfg Co (USA) |
| Reference | Meaning |
|---|---|
| SSBN409-4398579 | C/1 Advisory reference — outside the item-of-supply concept Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
NSN 5310-01-142-5347 is a Washer,flat, manufactured by Sje Inc. Dba San Juan Engineering & Mfg Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-142-5347 has 1 manufacturer part number on file: SSBN409-4398579PC7 (Sje Inc. Dba San Juan Engineering & Mfg Co).
Key specifications for SSBN409-4398579PC7: Surface Finish: 32.0 MICROINCHES ALL SURFACES; Overall Diameter: 3.438 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 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.