The Piston Assembly, cataloged under National Stock Number 1240-01-126-9864, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1240-01-126-9864 |
| Item Name | Piston Assembly |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF 2 SCREW FLAT MS51959-3,SEAL PISTON ENCASED SM-D-806572,CAP PISTON SM-C-806568,BEARING SLEEVE SM-C-773528-2,2 RING RETAINING MS16624-4025,2 WASHER THRUST SM-C-773588-2,PIN REGENERATOR ROD SM-C-773586,2 WASHER THRUST SM-C-773588-1,BEARING SLEEVE SM-C-773528-1,ROD REGENERATOR SM-D-773587,2 GUIDE PISTON SM-C-808345,2PIN RETAINING MS16624-5018-1,PIN WRIST PISTON SM-C-808342,PISTON COMPRESSION SM-D-806564,BEARING ROLLAR SM-C-773527-2,BEARING ROLLAR SM-C-773527-1,ROD PISTON SM-D-773559 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| SM-D-806567 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1240-01-126-9864 is a Piston Assembly, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
Key specifications for 1240-01-126-9864: General Characteristics Item Description: CONSISTS OF 2 SCREW FLAT MS51959-3,SEAL PISTON ENCASED SM-D-806572,CAP PISTON SM-C-806568,BEARING SLEEVE SM-C-773528-2,2 RING RETAINING MS16624-4025,2 WASHER THRUST SM-C-773588-2,PIN REGENERATOR ROD SM-C-773586,2 WASHER THRUST SM-C-773588-1,BEARING SLEEVE SM-C-773528-1,ROD REGENERATOR SM-D-773587,2 GUIDE PISTON SM-C-808345,2PIN RETAINING MS16624-5018-1,PIN WRIST PISTON SM-C-808342,PISTON COMPRESSION SM-D-806564,BEARING ROLLAR SM-C-773527-2,BEARING ROLLAR SM-C-773527-1,ROD PISTON SM-D-773559. 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.