The Nut,plain,round, cataloged under National Stock Number 5310-00-421-9890, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Dba Lockheed Martin Government. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-421-9890 |
| Primary Part Number | 268-2738 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Dba Lockheed Martin Government |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-F-14072,E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNS |
| Thread Pitch Diameters | +0.7365 TO 0.7406 INCHES IN |
| Material Document and Classification | ASTM A582 COND A ASSN STD 1ST MATERIAL RESPONSE OR QQ-S-763 COND A ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.043 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.750 INCHES IN |
| Nut Diameter | 1.057 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN |
| Drive Point Depth | 0.057 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN |
| Nut Thickness | 0.067 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Drive Point Quantity | 2 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 48 |
| Material | STEEL COMP 303 OR STEEL COMP 316 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 |
|---|---|
| 268-2738 PRIMARY | Lockheed Martin Corporation Dba Lockheed Martin Government (USA) |
| Reference | Meaning |
|---|---|
| 268-21738 | 5/9 Secondary reference Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions |
NSN 5310-00-421-9890 is a Nut,plain,round, manufactured by Lockheed Martin Corporation Dba Lockheed Martin Government, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-421-9890 has 1 manufacturer part number on file: 268-2738 (Lockheed Martin Corporation Dba Lockheed Martin Government).
Key specifications for 268-2738: Surface Treatment Document and Classification: MIL-F-14072,E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNS; Thread Pitch Diameters: +0.7365 TO 0.7406 INCHES IN; Material Document and Classification: ASTM A582 COND A ASSN STD 1ST MATERIAL RESPONSE OR QQ-S-763 COND A ASSN STD 2ND 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.