The Nut,plain,round, cataloged under National Stock Number 5310-00-949-8029, 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 Dba Northrop Grumman Systems Corp. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-949-8029 |
| Primary Part Number | HS1550-325 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Thread Series | UNEF |
| Material Document and Classification | MIL-S-6758,COND F4 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626,COND D1 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.188 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.750 INCHES IN |
| Nut Diameter | 1.391 INCHES NOMINAL IN |
| Drive Point Depth | 0.625 INCHES NOMINAL IN |
| Nut Thickness | 0.250 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM AND PHOSPHATE OVERALL |
| Drive Point Quantity | 8 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8740 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 |
|---|---|
| HS1550-325 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| HS1550-325 | 5/9 Secondary reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
| HS1550-325 | 3/9 Design control — primary reference Mcdonnell Douglas Helicopter Co Inc |
| HS1550-325 | 5/9 Secondary reference The Boeing Company |
NSN 5310-00-949-8029 is a Nut,plain,round, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-949-8029 has 1 manufacturer part number on file: HS1550-325 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
Key specifications for HS1550-325: Thread Series: UNEF; Material Document and Classification: MIL-S-6758,COND F4 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626,COND D1 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 3RD MATERIAL RESPONSE OVERALL; Drive Point Width: 0.188 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND. 14 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.