The Nut,plain,square, cataloged under National Stock Number 5310-01-197-3108, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Avtron Aerospace Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-197-3108 |
| Primary Part Number | 520359 |
| Item Name | Nut,plain,square |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Avtron Aerospace Inc |
| Status | ACTIVE |
| Thread Series | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Nut Height | 0.156 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Nut Style | SQUARE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Bearing Surface Type | FLAT |
| 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 |
|---|---|
| 520359 | Avtron Aerospace Inc (USA) |
| Reference | Meaning |
|---|---|
| D7941-1024-3B | 5/9 Secondary reference Tinnerman Palnut Engineered Products, Inc. |
| C7941-1024-3B | C/1 Advisory reference — outside the item-of-supply concept Star Marine Engine Works Div of Graymarine Corp |
| C7941-1024-3B | 3/9 Design control — primary reference Tinnerman Palnut Engineered Products, Inc. |
NSN 5310-01-197-3108 is a Nut,plain,square, manufactured by Avtron Aerospace Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-197-3108 has 1 manufacturer part number on file: 520359 (Avtron Aerospace Inc).
Key specifications for 520359: Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.190 INCHES IN; Nut Height: 0.156 INCHES NOMINAL IN. 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.