The Adapter,sleeve, cataloged under National Stock Number 1240-01-052-1976, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-052-1976 |
| Primary Part Number | 12266530 |
| Item Name | Adapter,sleeve |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | STAINLESS STEEL,17-4 PH; 2.625 IN. OVERALL DIA.; 1.094 IN. OVERALL LG.; CONTAINS SIX 0.218 IN. DIA HOLES EQUALLY SPACED IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 12266530 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 6695-505 | 5/9 Secondary reference Recon/optical, Inc. |
| 6695-505 | 5/9 Secondary reference U.S. Government activity |
NSN 1240-01-052-1976 is a Adapter,sleeve, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-052-1976 has 1 manufacturer part number on file: 12266530 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12266530: General Characteristics Item Description: STAINLESS STEEL,17-4 PH; 2.625 IN. OVERALL DIA.; 1.094 IN. OVERALL LG.; CONTAINS SIX 0.218 IN. DIA HOLES EQUALLY SPACED 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.
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.