The Nut,plain,round, cataloged under National Stock Number 5310-01-398-8771, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Isotta Fraschini Motori Spa. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-398-8771 |
| Primary Part Number | 98070F92 ITEM 437 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Isotta Fraschini Motori Spa |
| Status | ACTIVE |
| Thread Series | M |
| Thread Pitch in Millimeters | 0.15 |
| Drive Point Width | 5.0 MILLIMETERS NOMINAL MM |
| Nominal Thread Size | 30.0 MILLIMETERS MM |
| Nut Diameter | 50.0 MILLIMETERS NOMINAL MM |
| Drive Point Depth | 3.0 MILLIMETERS NOMINAL MM |
| Undercut Thickness | 65.0 MILLIMETERS NOMINAL MM |
| Nut Thickness | 13.0 MILLIMETERS NOMINAL MM |
| Small End Diameter | 31.3 MILLIMETERS NOMINAL MM |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Material | STEEL COMP 1039 OVERALL |
| 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 |
|---|---|
| 98070F92 ITEM 437 | Isotta Fraschini Motori Spa (ITA) |
| 98183F01 | Isotta Fraschini Motori Spa (ITA) |
| Reference | Meaning |
|---|---|
| 98183F01VM | C/1 Advisory reference — outside the item-of-supply concept Naval Inventory Control Point Mechanicsburg |
| 98183F01 | 3/9 Design control — primary reference Hoechst-Roussel Pharmaceuticals Inc |
NSN 5310-01-398-8771 is a Nut,plain,round, manufactured by Isotta Fraschini Motori Spa, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-398-8771 has 2 manufacturer part numbers on file: 98070F92 ITEM 437 (Isotta Fraschini Motori Spa), 98183F01 (Isotta Fraschini Motori Spa).
Key specifications for 98070F92 ITEM 437: Thread Series: M; Thread Pitch in Millimeters: 0.15; Drive Point Width: 5.0 MILLIMETERS NOMINAL MM; Nominal Thread Size: 30.0 MILLIMETERS MM. 12 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.