The Nut,self-Locking,castellated,hex, cataloged under National Stock Number 5310-01-525-9797, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Cfm International Inc Dba Cfm International. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-525-9797 |
| Primary Part Number | 649-784-527-0 |
| Item Name | Nut,self-Locking,castellated,hex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Cfm International Inc Dba Cfm International |
| Status | ACTIVE |
| Width Across Flats | 12.50 MILLIMETERS MINIMUM AND 12.75 MILLIMETERS MAXIMUM MM |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 120.0 CELSIUS MAXIMUM DEGC |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 7.95 MILLIMETERS MINIMUM AND 8.70 MILLIMETERS MAXIMUM MM |
| Nut Style | CASTELLATED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL NUT |
| Material | PLASTIC POLYAMIDE NYLON LOCKING INSERT |
| Bearing Surface Type | FLAT |
| 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 |
|---|---|
| 649-784-527-0 PRIMARY | Cfm International Inc Dba Cfm International (USA) |
NSN 5310-01-525-9797 is a Nut,self-Locking,castellated,hex, manufactured by Cfm International Inc Dba Cfm International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-525-9797 has 1 manufacturer part number on file: 649-784-527-0 (Cfm International Inc Dba Cfm International).
Key specifications for 649-784-527-0: Width Across Flats: 12.50 MILLIMETERS MINIMUM AND 12.75 MILLIMETERS MAXIMUM MM; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Temp Rating: 120.0 CELSIUS MAXIMUM DEGC; Thread Direction: RIGHT-HAND. 13 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.