PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20170Cap,lens

Butler Creek · NSN 5855-01-540-4379 · FSC 5855 · No Item Name Available
Verified by PartsTable
NSN 5855-01-540-4379 — this item is cataloged by the U.S. Government under National Stock Number 5855-01-540-4379. Primary manufacturer part number: 20170.
Features
  • Cap,lens — FSC 5855
  • 1 verified cross-reference
  • Primary manufacturer: Butler Creek
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cap,lens, cataloged under National Stock Number 5855-01-540-4379, is classified within Federal Supply Class 5855 (No Item Name Available) of the Communication, Detection, and Coherent Radiation Equipment group. The primary manufacturer of record is Butler Creek. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5855-01-540-4379
Primary Part Number20170
Item NameCap,lens
FSC / FSG5855 / 58 — No Item Name Available
ManufacturerButler Creek
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5950-00-100-4557WM-5254 INTERCHANGEABLE
Transformer,power
Magnetic Components Inc
2910-00-109-253920170 INTERCHANGEABLE
Pump,fuel Booster
Norcatec Llc
4720-00-110-844820170 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5331-01-240-892520170 INTERCHANGEABLE
O-Ring
Terex Reedrill Dba Reedrill Texoma Div Terex Mining
3120-01-322-2897 INTERCHANGEABLE
Bearing Set,sleeve
3040-01-641-2806501-7066669-76 INTERCHANGEABLE
Housing,mechanical Drive
Naval Sea Systems Command
5325-01-723-427820170-14 INTERCHANGEABLE
Ring,retaining
B.w. Elliott Manufacturing Co., Llc
Cross-Reference Index
Part NumberManufacturer
20170 PRIMARY Butler Creek (USA)
Related Parts
5950-00-100-4557INTERCHANGEABLE
TRANSFORMER,POWER
WM-5254
2910-00-109-2539INTERCHANGEABLE
PUMP,FUEL BOOSTER
20170
4720-00-110-8448INTERCHANGEABLE
HOSE,PREFORMED
20170
5331-01-240-8925INTERCHANGEABLE
O-RING
20170
3120-01-322-2897INTERCHANGEABLE
BEARING SET,SLEEVE
3040-01-641-2806INTERCHANGEABLE
HOUSING,MECHANICAL DRIVE
501-7066669-76
5325-01-723-4278INTERCHANGEABLE
RING,RETAINING
20170-14

Frequently Asked Questions

What is NSN 5855-01-540-4379?

NSN 5855-01-540-4379 is a Cap,lens, manufactured by Butler Creek, classified under FSC 5855 (No Item Name Available). Status: active.

What are the part numbers for NSN 5855-01-540-4379?

NSN 5855-01-540-4379 has 1 cross-referenced part number: 20170 (Butler Creek).

What NSN replaces 5855-01-540-4379?

There are 7 known substitutes for 5855-01-540-4379: 5950-00-100-4557, 2910-00-109-2539, 4720-00-110-8448 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20170?

Key specifications for 20170: Overall Width: 2.00 INCHES NOMINAL IN; Special Features: WEATHERPROOF; SERIES OF COATINGS ENHANCE LIGHT TRANSMISSION; COVER PROTECTS LENS; HINGED PLASTIC OCULAR EYEPIECE LENS COVER FLIPS OPEN. WIDTH: 2 IN; HEIGHT: 2 IN; LENGTH: 1 IN; WEIGHT: 0.1LB. LBS; Overall Length: 1.00 INCHES NOMINAL IN. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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