The Spline,shaft End, cataloged under National Stock Number 1660-00-697-2279, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) 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1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1660-00-697-2279 |
| Item Name | Spline,shaft End |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL NITRALLOY 135 MOD;NITRIDE INTERNAL SPLINE TEETH;ROCKWELL 15N ON CASE;1.940 IN. LG BY 3.437 IN. DIA O/A BY 2.437 IN. BODY DIA BY 2.252 IN. ID;24 INVOLUTE SPLINE TEETH,1.857 IN. MINOR DIA BY 2.180 IN. MAJOR DIA BY 2.000 IN. PD BY 20.0 DEG PRESSURE ANGLE;FOUR 0.312 IN. DIA HOLES EQUALLY SPACED ON 2.8125 IN. DIA BC W/0.312-24 NF-3B THD BY 0.261 IN. LG IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 4488884 | 3/2 Design control — primary reference U.S. Government activity |
| 4488884 | 5/9 Secondary reference The Boeing Company |
NSN 1660-00-697-2279 is a Spline,shaft End, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-00-697-2279: General Characteristics Item Description: STEEL NITRALLOY 135 MOD;NITRIDE INTERNAL SPLINE TEETH;ROCKWELL 15N ON CASE;1.940 IN. LG BY 3.437 IN. DIA O/A BY 2.437 IN. BODY DIA BY 2.252 IN. ID;24 INVOLUTE SPLINE TEETH,1.857 IN. MINOR DIA BY 2.180 IN. MAJOR DIA BY 2.000 IN. PD BY 20.0 DEG PRESSURE ANGLE;FOUR 0.312 IN. DIA HOLES EQUALLY SPACED ON 2.8125 IN. DIA BC W/0.312-24 NF-3B THD BY 0.261 IN. LG IN; End Item Identification: 1660-00-213-2856,SHAFT,INPUT. 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 1660-00-697-2279 has DEMIL Code B. 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.