The Trunnion Assy,tail Rotor, cataloged under National Stock Number 1615-00-121-6392, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1615-00-121-6392 |
| Item Name | Trunnion Assy,tail Rotor |
| FSC / FSG | 1615 / 16 — Helicopter Rotor Blades, Drive Mechanisms and Components |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY QQ-A-225/6 COMP 2024-T4 OR COMP 2024-T351,HARD ANODIZEBPS FW4387,DIM.,2.840 IN. MIN,2.850 IN. MAX O/A LG,1.400 IN. NOM CENTER SPHERICAL DIA,1.0015 IN. MIN,1.0020 IN. MAX LEFT AND RIGHT END OD,0.500-13UNC CLASS 3B INTERNAL THREADS IN. LEFT AND RIGHT ENDS,ENDS COUNTERBORED 0.610 IN. DIA BY 0.187 IN. DEEP,TRUNNION INTERNAL SPLINE DATA,FLAT ROOT.SLIDINGSIDE FIT,MODIFIED SPLINE,32 TEETH,32/64 DIAMETRAL PITCH,30.0 DEG PRESSURE ANGLE,0.9688 IN. MIN,0.9700 IN. MAX MINOR DIA,1.0288 IN. MIN,1.0328 IN. MAX MAJOR DIA,1.000 IN. PITCH DIA,ONE NO. RZA11978 STUD THREADED INTO EACH ARM END,ONE NO. 206-011-807-1 LINER INSTALLED ON EAACH ARM OD 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 |
|---|---|
| 206-011-803-5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1615-00-121-6392 is a Trunnion Assy,tail Rotor, classified under FSC 1615, Helicopter Rotor Blades, Drive Mechanisms and Components. Status: active.
Key specifications for 1615-00-121-6392: General Characteristics Item Description: ALUMINUM ALLOY QQ-A-225/6 COMP 2024-T4 OR COMP 2024-T351,HARD ANODIZEBPS FW4387,DIM.,2.840 IN. MIN,2.850 IN. MAX O/A LG,1.400 IN. NOM CENTER SPHERICAL DIA,1.0015 IN. MIN,1.0020 IN. MAX LEFT AND RIGHT END OD,0.500-13UNC CLASS 3B INTERNAL THREADS IN. LEFT AND RIGHT ENDS,ENDS COUNTERBORED 0.610 IN. DIA BY 0.187 IN. DEEP,TRUNNION INTERNAL SPLINE DATA,FLAT ROOT.SLIDINGSIDE FIT,MODIFIED SPLINE,32 TEETH,32/64 DIAMETRAL PITCH,30.0 DEG PRESSURE ANGLE,0.9688 IN. MIN,0.9700 IN. MAX MINOR DIA,1.0288 IN. MIN,1.0328 IN. MAX MAJOR DIA,1.000 IN. PITCH DIA,ONE NO. RZA11978 STUD THREADED INTO EACH ARM END,ONE NO. 206-011-807-1 LINER INSTALLED ON EAACH ARM OD 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 1615-00-121-6392 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.