The Nut,plain,octagon, cataloged under National Stock Number 5310-00-276-3399, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Meritor Industrial Products, Llc. Government technical data includes 11 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through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-276-3399 |
| Primary Part Number | 1827X50 |
| Item Name | Nut,plain,octagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meritor Industrial Products, Llc |
| Status | ACTIVE |
| Width Across Flats | 4.875 INCHES NOMINAL IN |
| Thread Series | UN |
| Material Document and Classification | QQ-A-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 4.000 INCHES IN |
| Nut Height | 0.438 INCHES NOMINAL IN |
| Nut Style | PLAIN, OCTAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 1020 OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| 1827X50 PRIMARY | Meritor Industrial Products, Llc (USA) |
| 2763399 | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
| Reference | Meaning |
|---|---|
| 2117303 | 5/9 Secondary reference General Motors Corp |
| 1827X50 | 5/9 Secondary reference Meritor Heavy Vehicle Systems, Llc |
| 12A7109 | 5/2 Secondary reference U.S. Government activity |
| 5310002763399 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 261SP28 | 5/9 Secondary reference Mack Trucks, Inc. Dba Volvo Powertrain North America Div Hagerstown Powertrain Operations |
| 1827X50 | 5/9 Secondary reference Dart Truck Co |
| 2117303 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 5310002763399 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 394749 | 5/9 Secondary reference White Motor Corp |
| 1827X50 | 5/9 Secondary reference Koehring Co Lorain Div |
| 1827X50 | 5/9 Secondary reference White Motor Corp |
| 1827X50 | 5/9 Secondary reference Koehring Cranes and Excavators Inc Sub of Northwest Engineering Co |
NSN 5310-00-276-3399 is a Nut,plain,octagon, manufactured by Meritor Industrial Products, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-276-3399 has 2 manufacturer part numbers on file: 1827X50 (Meritor Industrial Products, Llc), 2763399 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 1827X50: Width Across Flats: 4.875 INCHES NOMINAL IN; Thread Series: UN; Material Document and Classification: QQ-A-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 11 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.