The Blade Retaining Bolt, cataloged under National Stock Number 1680-01-595-4077, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-01-595-4077 |
| Item Name | Blade Retaining Bolt |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| Overall Diameter | 1.260 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE |
| Material | STEEL CORROSION RESISTING |
| Thread Size and Series/type Designator | 0.-18 3A UNIFIED NATIONAL JOINT FINE (UNJF) A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 767038 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1680-01-595-4077 is a Blade Retaining Bolt, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
Key specifications for 1680-01-595-4077: Overall Diameter: 1.260 INCHES NOMINAL IN; Overall Length: 1.343 INCHES NOMINAL IN; Surface Treatment: PASSIVATE; End Item Identification: BOLT HEAD IS FLAT, CIRCULAR AND 0.293 THICK; SURFACE OF HEAD HAS 5 BLIND HOLES: DIA 0.188 X 0.293 DEPTH - 4 OF THE HOLES ARE AROUND THE OUTER EDGE OF THE BOLT HEAD SURFACE MEASURING FROM THE CENTER OF THE 5TH BLIND HOLE LOCATED IN THE CENTER OF THE HEAD TO EACH OF THE 4 SURROUNDING BLIND HOLE CENTERS IS 0.430 EA; AT THREAD END OF BOLT THERE IS A 30.0 COUNTERSUNK BLIND HOLE IN THE END OF THE BOLT TRAVELING TOWARDS THE HEAD END WITH A DIA OF: 0.370 X 0.609 DEPTH; FROM BOTTOM OF HEAD TO END OF THREAD END OF BOLT THE LENGTH IS: 1.050; SHANK DIA OF BOLT IS: 0.554. 4 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.