PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

EC20Plug,protective,dust and Moistur

Lockheed Martin Corporation Div Rms · NSN 5340-01-121-4173 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-121-4173 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-121-4173. Primary manufacturer part number: EC20.
Features
  • Plug,protective,dust and Moistur — FSC 5340
  • 1 verified cross-reference
  • Primary manufacturer: Lockheed Martin Corporation Div Rms
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Plug,protective,dust and Moistur, cataloged under National Stock Number 5340-01-121-4173, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lockheed Martin Corporation Div Rms. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NamePlug,protective,dust and Moistur
FSC / FSG5340 — No Item Name Available (FSG 53)
ManufacturersLockheed Martin Corporation Div Rms (CAGE 03538)
Successor NSN5340-00-660-5248 — Cap,protective,dust and Moisture
Technical Specifications
ParameterValue
NSN5340-01-121-4173
Primary Part NumberEC20
Item NamePlug,protective,dust and Moistur
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
Cap,protective,dust and Moisture
4330-01-073-60649795-71 INTERCHANGEABLE
Filter,fluid
Pentair Filtration Solutions, Llc
4820-01-338-2018EC20B 1/4IN INTERCHANGEABLE
Valve,check
Deltrol Corp
5340-01-347-9717EC20 INTERCHANGEABLE
Cap,protective,dust and Moisture
Dialogic Corp Dba Dialogic Fasteners
5930-01-423-1666 INTERCHANGEABLE
Switch,push
4720-01-446-28743204-0830 INTERCHANGEABLE
Hose,nonmetallic
Gates Corporation
Cross-Reference Index
Part NumberManufacturer
EC20 PRIMARY Lockheed Martin Corporation Div Rms (USA)
Related Parts
5340-00-660-5248SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
4330-01-073-6064INTERCHANGEABLE
FILTER,FLUID
9795-71
4820-01-338-2018INTERCHANGEABLE
VALVE,CHECK
EC20B 1/4IN
5340-01-347-9717INTERCHANGEABLE
CAP,PROTECTIVE,DUST AND MOISTURE
EC20
5930-01-423-1666INTERCHANGEABLE
SWITCH,PUSH
4720-01-446-2874INTERCHANGEABLE
HOSE,NONMETALLIC
3204-0830

Frequently Asked Questions

What is NSN 5340-01-121-4173?

NSN 5340-01-121-4173 is a Plug,protective,dust and Moistur, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-01-121-4173?

NSN 5340-01-121-4173 has 1 cross-referenced part number: EC20 (Lockheed Martin Corporation Div Rms).

What NSN replaces 5340-01-121-4173?

There are 6 known substitutes for 5340-01-121-4173: 5340-00-660-5248, 4330-01-073-6064, 4820-01-338-2018 and 3 more. Verify interchangeability with system specifications before substitution.

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