The Nut,plain,round, cataloged under National Stock Number 5310-00-185-6541, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-185-6541 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416 TYPE 2 CLASS 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 TYPE 2 CLASS 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Series | UNS |
| Hardness Rating | 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM |
| Thread Pitch Diameters | +2.5119 TO 2.5170 INCHES IN |
| Drive Point Width | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.548 INCHES IN |
| Nut Diameter | 3.355 INCHES MINIMUM AND 3.385 INCHES MAXIMUM IN |
| Drive Point Depth | 0.125 INCHES NOMINAL IN |
| Nut Thickness | 0.553 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| N13ZINCC0ATED | 5/1 Secondary reference Whittet-Higgins Company |
| 12Z335-214 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| MS19068-132 | 2/2 Government specification standardization U.S. Government activity |
| M12554 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-00-185-6541 is a Nut,plain,round, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-185-6541: Surface Treatment Document and Classification: QQ-P-416 TYPE 2 CLASS 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 TYPE 2 CLASS 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL; Thread Series: UNS; Hardness Rating: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM; Thread Pitch Diameters: +2.5119 TO 2.5170 INCHES IN. 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.