The Adapter,curvic Coupling, cataloged under National Stock Number 1615-00-731-9012, is classified within Federal Supply Class 1615 (Helicopter Rotor Blades, Drive Mechanisms and Components) of the Aircraft Components and Accessories group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1615-00-731-9012 |
| Item Name | Adapter,curvic Coupling |
| FSC / FSG | 1615 / 16 — Helicopter Rotor Blades, Drive Mechanisms and Components |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,AMS6415,CADMIUM-PLATED QQ-P-416 CLASS 3 TYPE 2,DIM.,3.184 IN. NOMLG,6.125 IN. NOM FLANGE OD BY 0.290 IN. NOM W,1.375 IN. NOM BODY OD,RIGHT END OD SPLINE DATA,24 TEETH 1.500 IN. LG,12/32 DIAMETRAL PITCH,30.0 DEG PRESSURE ANGLE,1.500 IN. PITCH DIA,1.3638 IN. MIN,1.3750 IN. MAX MINOR DIA,1.5575 IN. MIN,1.5625 IN. MAX MAJOR DIA,ONE OD FLANGE LOCATED 1.500 IN. FROM RIGHT END W/1.6775 IN. OD BY 0.200 IN. W,0.910 IN. NOM ID BY 2.696 IN. NOM LG,COUNTERBORED TO 1.160 IN. DIA BY 1.375 IN.LG,6.125 IN. FLANGE LEFT FACE CURVIC COUPLING,36 TEETH 0.375 IN. LG,30.0 DEG PRESSURE ANGLE,ONE FLANE CENTER HOLE0.516 IN. DIA,ITEM USED ON ENGINE MAINDRIVE SHAFT IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Reference | Meaning |
|---|---|
| 204-040-630-005 | 5/2 Secondary reference U.S. Government activity |
| 204-040-630-5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1615-00-731-9012 is a Adapter,curvic Coupling, classified under FSC 1615, Helicopter Rotor Blades, Drive Mechanisms and Components. Status: active.
Key specifications for 1615-00-731-9012: General Characteristics Item Description: STEEL,AMS6415,CADMIUM-PLATED QQ-P-416 CLASS 3 TYPE 2,DIM.,3.184 IN. NOMLG,6.125 IN. NOM FLANGE OD BY 0.290 IN. NOM W,1.375 IN. NOM BODY OD,RIGHT END OD SPLINE DATA,24 TEETH 1.500 IN. LG,12/32 DIAMETRAL PITCH,30.0 DEG PRESSURE ANGLE,1.500 IN. PITCH DIA,1.3638 IN. MIN,1.3750 IN. MAX MINOR DIA,1.5575 IN. MIN,1.5625 IN. MAX MAJOR DIA,ONE OD FLANGE LOCATED 1.500 IN. FROM RIGHT END W/1.6775 IN. OD BY 0.200 IN. W,0.910 IN. NOM ID BY 2.696 IN. NOM LG,COUNTERBORED TO 1.160 IN. DIA BY 1.375 IN.LG,6.125 IN. FLANGE LEFT FACE CURVIC COUPLING,36 TEETH 0.375 IN. LG,30.0 DEG PRESSURE ANGLE,ONE FLANE CENTER HOLE0.516 IN. DIA,ITEM USED ON ENGINE MAINDRIVE SHAFT IN. 1 specification is 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.
NSN 1615-00-731-9012 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.