The Nut,plain,round, cataloged under National Stock Number 5310-01-024-7555, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-024-7555 |
| Primary Part Number | 389570-1 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Hole Thread Quantity Per Inch | 20 |
| Thread Series | UNF |
| Hole Configuration Style | CONFIGURATION J |
| Material Document and Classification | QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.250 INCHES IN |
| Nut Diameter | 2.812 INCHES NOMINAL IN |
| Drive Point Depth | 0.438 INCHES NOMINAL IN |
| Nut Thickness | 0.594 INCHES NOMINAL IN |
| Drive Point Diameter | 0.281 INCHES NOMINAL IN |
| Drive Point Quantity | 2 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Hole Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Quantity Per Inch | 12 |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL |
| Hole Type and Quantity | 1 TAPPED |
| 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 |
|---|---|
| SK-188765PC18 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 389570-1 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| SK-189570PC2 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 389570-01 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| SK-188765PC18 | 5/9 Secondary reference U.S. Government activity |
| 389570-1 | 3/9 Design control — primary reference U.S. Government activity |
| SK-189570PC2 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-024-7555 is a Nut,plain,round, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-024-7555 has 3 manufacturer part numbers on file: SK-188765PC18 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 389570-1 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), SK-189570PC2 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 389570-1: Hole Thread Quantity Per Inch: 20; Thread Series: UNF; Hole Configuration Style: CONFIGURATION J; Material Document and Classification: QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL. 17 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.