The Nut,plain,slotted,hexagon, cataloged under National Stock Number 5310-01-129-0596, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 15 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-129-0596 |
| Primary Part Number | 18803-3 |
| Item Name | Nut,plain,slotted,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Width Across Flats | 2.250 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | 1500 MIL STD SINGLE TREATMENT RESPONSE OR F-T402,FSCM 77751 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT (UNJ) |
| Material Document and Classification | MIL-S-5000,COND E MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-5000,COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.280 INCHES MINIMUM AND 0.305 INCHES MAXIMUM FIRST END IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.875 INCHES IN |
| Counterbore Diameter | 2.030 INCHES NOMINAL FIRST END IN |
| Nut Height | 1.000 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | SLOTTED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP E4340 OVERALL |
| Bearing Surface Type | WASHER FACED |
| 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 |
|---|---|
| 18803-3 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 5310-01-129-0596 is a Nut,plain,slotted,hexagon, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-129-0596 has 1 manufacturer part number on file: 18803-3 (Northrop Grumman Systems Corporation).
1 possible match (shared part number, not a government interchangeability claim): 7530-01-611-4166. Verify interchangeability with system specifications before substitution.
Key specifications for 18803-3: Width Across Flats: 2.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: 1500 MIL STD SINGLE TREATMENT RESPONSE OR F-T402,FSCM 77751 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT (UNJ); Material Document and Classification: MIL-S-5000,COND E MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-5000,COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 15 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.