The Washer,flat, cataloged under National Stock Number 5310-00-413-0054, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Cosmo Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-413-0054 |
| Primary Part Number | 31TC7-16-625-062-6 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Cosmo Corporation |
| Status | ACTIVE |
| Overall Diameter | 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.314 INCHES MINIMUM AND 0.319 INCHES MAXIMUM IN |
| Thickness | 0.025 INCHES MINIMUM AND 0.035 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 |
|---|---|
| 31TC7-16-625-062-6 PRIMARY | Cosmo Corporation (USA) |
| Reference | Meaning |
|---|---|
| 31TC | C/1 Advisory reference — outside the item-of-supply concept Cosmo Corporation |
NSN 5310-00-413-0054 is a Washer,flat, manufactured by Cosmo Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-413-0054 has 1 manufacturer part number on file: 31TC7-16-625-062-6 (Cosmo Corporation).
Key specifications for 31TC7-16-625-062-6: Overall Diameter: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: PLASTIC POLYAMIDE NYLON OVERALL. 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.