The Nut,plain,knurled, cataloged under National Stock Number 5310-01-613-3920, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-613-3920 |
| Primary Part Number | 731443-4 |
| Item Name | Nut,plain,knurled |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND |
| Nut Diameter | 1.875 INCHES NOMINAL IN |
| Nut Thickness | 1.000 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE MANGANESE OVERALL |
| Nut Style | KNURLED |
| Material | STEEL COMP 1144 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 |
|---|---|
| 731443-4 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 5310-01-613-3920 is a Nut,plain,knurled, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-613-3920 has 1 manufacturer part number on file: 731443-4 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 731443-4: Thread Direction: RIGHT-HAND; Nut Diameter: 1.875 INCHES NOMINAL IN; Nut Thickness: 1.000 INCHES NOMINAL IN; Special Features: 2 THRU HOLES 5/16 IN. DIA, 90 DEG APART;MEDIUM KNURL ON EXTERNAL SURFACE; CENTER HOLE 1 IN.- 14 N.F. - 3 THRU; BRINELL HARDNESS 240-311 IN. 6 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.