The Washer,convex, cataloged under National Stock Number 5310-01-440-4443, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sea-Tech Systems, Inc. Dba Sea Tech Systems. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-440-4443 |
| Primary Part Number | 65-3110P |
| Item Name | Washer,convex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sea-Tech Systems, Inc. Dba Sea Tech Systems |
| Status | ACTIVE |
| Style Designator | CONVEX |
| Outside Diameter | 1.810 INCHES NOMINAL IN |
| Material Thickness | 0.560 INCHES NOMINAL IN |
| Material | PLASTIC POLYOLEFIN OVERALL |
| Hole Diameter | 1.500 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 |
|---|---|
| 65-3110P PRIMARY | Sea-Tech Systems, Inc. Dba Sea Tech Systems (USA) |
| Reference | Meaning |
|---|---|
| STSPOPW1003 | C/1 Advisory reference — outside the item-of-supply concept Sea-Tech Systems, Inc. Dba Sea Tech Systems |
NSN 5310-01-440-4443 is a Washer,convex, manufactured by Sea-Tech Systems, Inc. Dba Sea Tech Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-440-4443 has 1 manufacturer part number on file: 65-3110P (Sea-Tech Systems, Inc. Dba Sea Tech Systems).
Key specifications for 65-3110P: Style Designator: CONVEX; Outside Diameter: 1.810 INCHES NOMINAL IN; Material Thickness: 0.560 INCHES NOMINAL IN; Material: PLASTIC POLYOLEFIN OVERALL. 5 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.