NSN 5855-01-591-0273 · NIIN 015910273 · Part number 81B5370-1
Gentex Corp · FSC 5855 — Night Vision Equipment, Emitted and Reflected Radiation · FSG 58 — Communication, Detection, and Coherent Radiation Equipment · CAGE 72724
Government record, cited
NSN 5855-01-591-0273 — this item is cataloged by the U.S. Government under National Stock Number 5855-01-591-0273. Manufacturer of record part number: 81B5370-1.
Also searched as5855-01-591-0273 ·
5855015910273 ·
NIIN 015910273 ·
01-591-0273 ·
FSC 5855 Night Vision Equipment, Emitted and Reflected Radiation · CAGE 72724 · 81B5370-1
Nearby stock numbers← 5855-01-591-0050 Pan and Tilt Assembly, Thermal Vi
·
5855-01-591-0466 Illuminator, Infrared →
Features
Lens Stop — FSC 5855
1 manufacturer part number on file
Manufacturer of record: Gentex Corp
Identification
NSN: 5855-01-591-0273
NIIN: 015910273
FSC: 5855 — Night Vision Equipment, Emitted and Reflected Radiation
FSG: 58 — Communication, Detection, and Coherent Radiation Equipment
Primary part number: 81B5370-1
Manufacturer: Gentex Corp
General Description
The Lens Stop, cataloged under National Stock Number 5855-01-591-0273, is classified within Federal Supply Class 5855 (Night Vision Equipment, Emitted and Reflected Radiation) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Gentex Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
5855-01-591-0273
Primary Part Number
81B5370-1
Item Name
Lens Stop
FSC / FSG
5855 / 58 — Night Vision Equipment, Emitted and Reflected Radiation
Other items in FSC 5855 — Night Vision Equipment, Emitted and Reflected Radiation
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5855-00-003-2243
5855-00-003-2243 · Item name not on file
5855-00-003-3228
SUPPORT,SEARCHLIGH
5855-00-003-6408
LENS FILTER ASSY
5855-00-004-0904
PLATE
5855-00-004-1909
5855-00-004-1909 · Item name not on file
5855-00-006-9703
5855-00-006-9703 · Item name not on file
5855-00-007-5137
5855-00-007-5137 · Item name not on file
5855-00-010-0147
5855-00-010-0147 · Item name not on file
Frequently Asked Questions
What is NSN 5855-01-591-0273?
NSN 5855-01-591-0273 is a Lens Stop, manufactured by Gentex Corp, classified under FSC 5855, Night Vision Equipment, Emitted and Reflected Radiation. Status: active.
What part numbers are listed for NSN 5855-01-591-0273?
NSN 5855-01-591-0273 has 1 manufacturer part number on file: 81B5370-1 (Gentex Corp).
What are the specifications of 81B5370-1?
Key specifications for 81B5370-1: Part Name Assigned by Controlling Agency: LENS STOP SUBASSEMBLY; End Item Identification: HELMET ASSEMBLY. 0 specifications are documented in the U.S. Government catalog.
Is NSN 5855-01-591-0273 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.
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.