The Nut,self-Locking,internal Wrench, cataloged under National Stock Number 5310-01-210-9449, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-210-9449 |
| Primary Part Number | 751678-1-1 |
| Item Name | Nut,self-Locking,internal Wrench |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Surface Treatment Document and Classification | HS74 TYPE 2,CLASS 2 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 1.000 INCHES NOMINAL IN |
| Width Between Flats | 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE WITH METALLIC INSERT |
| Nut Height | 0.975 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | SOCKET |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4340 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 |
|---|---|
| 751678-1-1 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| 751678-1-1 | Horst Engineering & Manufacturing Co (USA) |
| Reference | Meaning |
|---|---|
| 751678-1-1 | 5/9 Secondary reference The Durol Company |
NSN 5310-01-210-9449 is a Nut,self-Locking,internal Wrench, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-210-9449 has 2 manufacturer part numbers on file: 751678-1-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 751678-1-1 (Horst Engineering & Manufacturing Co).
Key specifications for 751678-1-1: Surface Treatment Document and Classification: HS74 TYPE 2,CLASS 2 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNF; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM; Material Document and Classification: AMS 6415 ASSN STD SINGLE 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.