The Block Assembly,mt. Periscope, cataloged under National Stock Number 1240-01-280-5332, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-280-5332 |
| Primary Part Number | 10513279 |
| Item Name | Block Assembly,mt. Periscope |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL IS STEEL ALLOY,CORROSIONRESISTANT,INVESTMENT CASTING,COMP IC 322A,COND SOLUTION HEAT TREATED SPEC MIL-S-22216;HARDEN TO ROCKWELL C39 MIN.;OVERALL LENGTH 7.000 IN.;4 HOLES,0.3741 IN.;2 HOLES,0.438 IN. DIA.;2 HOLES,0.180 IN. DIA.;2 HOLES,0.281 IN. DIA.,0.406 IN. C BORE;0.250 IN. DEEP;4 HOLES,0.344 IN. DIA.;1 HOLE,NO.10 0.190 32 UNF-2B,0.375 IN. DEEP;1 HOLE,NO.10 0.190 32 UNF-2B 0.375 IN. DEEP,TAP DRILLED A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 10513279 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 1240-01-280-5332 is a Block Assembly,mt. Periscope, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-280-5332 has 1 manufacturer part number on file: 10513279 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 10513279: General Characteristics Item Description: MATERIAL IS STEEL ALLOY,CORROSIONRESISTANT,INVESTMENT CASTING,COMP IC 322A,COND SOLUTION HEAT TREATED SPEC MIL-S-22216;HARDEN TO ROCKWELL C39 MIN.;OVERALL LENGTH 7.000 IN.;4 HOLES,0.3741 IN.;2 HOLES,0.438 IN. DIA.;2 HOLES,0.180 IN. DIA.;2 HOLES,0.281 IN. DIA.,0.406 IN. C BORE;0.250 IN. DEEP;4 HOLES,0.344 IN. DIA.;1 HOLE,NO.10 0.190 32 UNF-2B,0.375 IN. DEEP;1 HOLE,NO.10 0.190 32 UNF-2B 0.375 IN. DEEP,TAP DRILLED A. 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 1240-01-280-5332 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.