NSN 1240-01-325-5538 · NIIN 013255538 · Part number 6537778 ITEM 2
Naval Sea Systems Command · FSC 1240 — Optical Sighting and Ranging Equipment · FSG 12 — Fire Control Equipment · CAGE 53711
Government record, cited
NSN 1240-01-325-5538 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-325-5538. Manufacturer of record part number: 6537778 ITEM 2.
Also searched as1240-01-325-5538 ·
1240013255538 ·
NIIN 013255538 ·
01-325-5538 ·
FSC 1240 Optical Sighting and Ranging Equipment · CAGE 53711 · 6537778 ITEM 2 · W8810400
FSC: 1240 — Optical Sighting and Ranging Equipment
FSG: 12 — Fire Control Equipment
Primary part number: 6537778 ITEM 2
Manufacturer: Naval Sea Systems Command
General Description
The Periscope Subassembly, cataloged under National Stock Number 1240-01-325-5538, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Naval Sea Systems Command. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1240-01-325-5538
Primary Part Number
6537778 ITEM 2
Item Name
Periscope Subassembly
FSC / FSG
1240 / 12 — Optical Sighting and Ranging Equipment
Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance
No interchangeability data on file.
Other items in FSC 1240 — Optical Sighting and Ranging Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1240-00-764-4734
SUNSHADE
1240-00-987-5071
1240-00-987-5071 · Item name not on file
1240-01-068-6676
HOLDER,OPTICAL ELEMENT
1240-01-082-8849
SIGHT,INFINITY
1240-01-090-0609
1240-01-090-0609 · Item name not on file
1240-01-102-4266
1240-01-102-4266 · Item name not on file
1240-01-110-9897
1240-01-110-9897 · Item name not on file
1240-01-361-6090
COLLIMATOR,INFINITY AIMING REFER
Frequently Asked Questions
What is NSN 1240-01-325-5538?
NSN 1240-01-325-5538 is a Periscope Subassembly, manufactured by Naval Sea Systems Command, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
What part numbers are listed for NSN 1240-01-325-5538?
NSN 1240-01-325-5538 has 1 manufacturer part number on file: 6537778 ITEM 2 (Naval Sea Systems Command).
What are the specifications of 6537778 ITEM 2?
Key specifications for 6537778 ITEM 2: Special Features: WELL RAIL SUBASSEMBLY; End Item Identification: WELL BUMPER ASSY PERISCOPE NO 1. 0 specifications are documented in the U.S. Government catalog.
Is NSN 1240-01-325-5538 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 1240-01-325-5538?
NSN 1240-01-325-5538 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.