The Case Assy,gear Box,tail Rotor Dr, cataloged under National Stock Number 1615-00-176-1237, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1615-00-176-1237 |
| Item Name | Case Assy,gear Box,tail Rotor Dr |
| FSC / FSG | 1615 / 16 — Helicopter Rotor Blades, Drive Mechanisms and Components |
| Status | ACTIVE |
| General Characteristics Item Description | MAGNESIUM ALLOY QQ-M-56 COMP AZ91C-T6,DIM.,4.550 IN. NOM DEEP,6.5715 IN. FRONT ID,7.880 IN. FRONT OD,EIGHT THREADED HOLES EQUALLY SPACED W/0.125-20UNC CLASS 3B THREADS ON 7.196 IN. DIA BOLT CIRCLE,EIGHT NO. AN126017 THRU AN126020 STUDS THREADED INTO HOLES,1.8125 IN. MIN,1.8130 IN. MAX BACK ID W/2.041 IN. COUNTERBORE DIA BY 0.188 IN. DEEP,THREE EQUALLY SPACED THREADED HOLESW/0.125-20 UNC CLASS 3B THREADED ON 2.500 IN. DIA BOLT CIRCLE,SIX THREADEDMOUNTING HOLES IN BASE THREADED W/NO. AN126419 THRU AN126422 STUDS W/2.035 IN. EXPOSED LG 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 | X |
| Reference | Meaning |
|---|---|
| 209-040-401-17 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1615-00-176-1237 is a Case Assy,gear Box,tail Rotor Dr, classified under FSC 1615, Helicopter Rotor Blades, Drive Mechanisms and Components. Status: active.
Key specifications for 1615-00-176-1237: General Characteristics Item Description: MAGNESIUM ALLOY QQ-M-56 COMP AZ91C-T6,DIM.,4.550 IN. NOM DEEP,6.5715 IN. FRONT ID,7.880 IN. FRONT OD,EIGHT THREADED HOLES EQUALLY SPACED W/0.125-20UNC CLASS 3B THREADS ON 7.196 IN. DIA BOLT CIRCLE,EIGHT NO. AN126017 THRU AN126020 STUDS THREADED INTO HOLES,1.8125 IN. MIN,1.8130 IN. MAX BACK ID W/2.041 IN. COUNTERBORE DIA BY 0.188 IN. DEEP,THREE EQUALLY SPACED THREADED HOLESW/0.125-20 UNC CLASS 3B THREADED ON 2.500 IN. DIA BOLT CIRCLE,SIX THREADEDMOUNTING HOLES IN BASE THREADED W/NO. AN126419 THRU AN126422 STUDS W/2.035 IN. EXPOSED LG 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 1615-00-176-1237 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.