NSN 2540-00-157-1693 · NIIN 001571693 · Part number 417210PC2
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · FSC 2540 — Vehicular Furniture and Accessories · FSG 25 — Vehicular Equipment Components · CAGE 10001
Government record, cited
NSN 2540-00-157-1693 — this item is cataloged by the U.S. Government under National Stock Number 2540-00-157-1693. Manufacturer of record part number: 417210PC2.
Also searched as2540-00-157-1693 ·
2540001571693 ·
NIIN 001571693 ·
00-157-1693 ·
FSC 2540 Vehicular Furniture and Accessories · CAGE 10001 · 417210PC2
General Characteristics Item Description: 5.125 IN. LG; ALUMINUM ALLOY; SULPHURIC ACID FINISH,BLACK,EXCEPT MATING SURFACE IN
2 manufacturer part numbers on file
Manufacturer of record: Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Identification
NSN: 2540-00-157-1693
NIIN: 001571693
FSC: 2540 — Vehicular Furniture and Accessories
FSG: 25 — Vehicular Equipment Components
Primary part number: 417210PC2
Manufacturer: Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
General Description
The Housing,heater,sight, cataloged under National Stock Number 2540-00-157-1693, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
Technical Specifications
Parameter
Value
NSN
2540-00-157-1693
Primary Part Number
417210PC2
Item Name
Housing,heater,sight
FSC / FSG
2540 / 25 — Vehicular Furniture and Accessories
Manufacturer
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Status
ACTIVE
General Characteristics Item Description
5.125 IN. LG; ALUMINUM ALLOY; SULPHURIC ACID FINISH,BLACK,EXCEPT MATING SURFACE IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
No interchangeability data on file.
Other items in FSC 2540 — Vehicular Furniture and Accessories
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2540-00-001-2045
2540-00-001-2045 · Item name not on file
2540-00-001-3392
2540-00-001-3392 · Item name not on file
2540-00-001-3467
2540-00-001-3467 · Item name not on file
2540-00-001-3534
2540-00-001-3534 · Item name not on file
2540-00-001-3535
2540-00-001-3535 · Item name not on file
2540-00-001-3536
2540-00-001-3536 · Item name not on file
2540-00-001-3537
BRACKET,HEADLIGHT,MOUNTING
2540-00-001-3538
BRACKET,HEADLIGHT,MOUNTING
Frequently Asked Questions
What is NSN 2540-00-157-1693?
NSN 2540-00-157-1693 is a Housing,heater,sight, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
What part numbers are listed for NSN 2540-00-157-1693?
NSN 2540-00-157-1693 has 2 manufacturer part numbers on file: 417210PC2 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 417210PC2 (Lockheed Martin Corporation Div Rms - Mitchel Field).
What are the specifications of 417210PC2?
Key specifications for 417210PC2: General Characteristics Item Description: 5.125 IN. LG; ALUMINUM ALLOY; SULPHURIC ACID FINISH,BLACK,EXCEPT MATING SURFACE IN; End Item Identification: GUN SIGHT MK20. 1 specification is documented in the U.S. Government catalog.
Is NSN 2540-00-157-1693 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
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.