The Nut,plain,round, cataloged under National Stock Number 5310-00-912-0658, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-912-0658 |
| Primary Part Number | 520844 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Hole Thread Quantity Per Inch | 28 |
| Surface Treatment Document and Classification | AMS 2210 ASSN STD SINGLE TREATMENT RESPONSE OR AMS 2212 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNJS |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Hole Configuration Style | CONFIGURATION F |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OR AM 6323 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM BASE IN |
| Drive Point Width | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 4.9375 INCHES IN |
| Nut Diameter | 5.572 INCHES MINIMUM AND 5.576 INCHES MAXIMUM IN |
| Counterbore Diameter | 5.277 INCHES MINIMUM AND 5.283 INCHES MAXIMUM BASE IN |
| Drive Point Depth | 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Nut Thickness | 1.640 INCHES MINIMUM AND 1.660 INCHES MAXIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Countersink Angle | 2.0 DEGREES MINIMUM AND 4.0 DEGREES MAXIMUM BASE |
| Drive Point Quantity | 10 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Hole Nominal Thread Diameter | 0.216 INCHES IN |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 8740 OVERALL |
| Hole Type and Quantity | 18 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 |
|---|---|
| 520844 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 520844 | 5/9 Secondary reference Dell Manufacturing Co., Llc Dba Pursuit Aerospace |
| 520844 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-912-0658 is a Nut,plain,round, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-912-0658 has 1 manufacturer part number on file: 520844 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 520844: Hole Thread Quantity Per Inch: 28; Surface Treatment Document and Classification: AMS 2210 ASSN STD SINGLE TREATMENT RESPONSE OR AMS 2212 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNJS; Hardness Rating: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM. 23 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.