The Belt Tension Assembly, cataloged under National Stock Number 1240-01-278-6891, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1240-01-278-6891 |
| Item Name | Belt Tension Assembly |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | ITEM C/O PIVOT ARM P/N SM-C-805580-2;HOUSING P/N SM-C-805575;SHAFT P/N SM-C-805576;BEARING P/N SM-C-968347-1;RING,RETAINING P/N MS 16633-4037;PIN P/N SM-C-773451-3 |
| 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 |
|---|---|
| SM-C-805439 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1240-01-278-6891 is a Belt Tension Assembly, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
Key specifications for 1240-01-278-6891: General Characteristics Item Description: ITEM C/O PIVOT ARM P/N SM-C-805580-2;HOUSING P/N SM-C-805575;SHAFT P/N SM-C-805576;BEARING P/N SM-C-968347-1;RING,RETAINING P/N MS 16633-4037;PIN P/N SM-C-773451-3. 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.
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.