The Retainer,optical Element, cataloged under National Stock Number 1240-01-131-5320, 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 15 specifications, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-131-5320 |
| Primary Part Number | 12309689 |
| Item Name | Retainer,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Radius From Geometric Axis to Hole Center | 0.834 INCHES NOMINAL IN |
| Flange Diameter | 2.000 INCHES NOMINAL IN |
| Shoulder Length | 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Hole or Slot Quantity | 1 |
| Drive Type | DRILLED HOLE |
| Shoulder Thread Size | 1.B75IN-32 UNS-2A A |
| Style Designator | SHOULDERED |
| Setscrew Notch | NOT PROVIDED |
| Diameter | 0.078 INCHES NOMINAL IN |
| Guide Location | SHOULDER |
| Guide Design | THREAD RELIEF |
| Depth | 0.360 INCHES NOMINAL IN |
| Internal Annular Serration | NOT PROVIDED |
| Material | ALUMINUM ALLOY 2011 AND ALUMINUM ALLOY 2024 AND ALUMINUM ALLOY 6061 |
| Hole Diameter | 1.500 INCHES MINIMUM AND 1.510 INCHES MAXIMUM 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 |
| Part Number | Manufacturer |
|---|---|
| 12309689 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 1240-01-131-5320 is a Retainer,optical Element, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-131-5320 has 1 manufacturer part number on file: 12309689 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12309689: Radius From Geometric Axis to Hole Center: 0.834 INCHES NOMINAL IN; Flange Diameter: 2.000 INCHES NOMINAL IN; Shoulder Length: 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN; Hole or Slot Quantity: 1. 15 specifications are 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 1240-01-131-5320 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.