PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MST206Cap,protective,dust and Moisture

Bunzl Plastic Inc Dba Alliance Plastics · NSN 5340-00-579-5669 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-579-5669 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-579-5669. Primary manufacturer part number: MST206.
Features
  • Cap,protective,dust and Moisture — FSC 5340
  • Material: PLASTIC
  • Thread Size and Series/type Designator: 9/16-18 UNF
  • Overall Diameter: 0.750 INCHES NOMINAL IN
  • Round Cap Outside Surface Condition: RIBBED
  • Design Type: THREADED
  • Inside Diameter Length: 0.563 INCHES NOMINAL IN
  • Thread Class: 2A A
Applications
  • Applications requiring Plastic construction
General Description

The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-00-579-5669, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Bunzl Plastic Inc Dba Alliance Plastics. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-579-5669
Primary Part NumberMST206
Item NameCap,protective,dust and Moisture
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerBunzl Plastic Inc Dba Alliance Plastics
StatusCANCELLED
MaterialPLASTIC
Thread Size and Series/type Designator9/16-18 UNF
Overall Diameter0.750 INCHES NOMINAL IN
Round Cap Outside Surface ConditionRIBBED
Design TypeTHREADED
Inside Diameter Length0.563 INCHES NOMINAL IN
Thread Class2A A
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Unit of IssueEA
Verified Substitutes 8
No Item Name Available
3455-00-059-557607880 INTERCHANGEABLE
Cutter,milling,metal Slitting
Niagara Cutter Inc
1610-00-081-3093 INTERCHANGEABLE
Cap,shipping
5310-00-423-95935B426 INTERCHANGEABLE
Washer,flat
Caterpillar Inc Div Caterpillar Defense
5999-00-686-9935 INTERCHANGEABLE
Cap,electrical
5210-01-140-0188M206-RB INTERCHANGEABLE
Gage,thickness Transducer
Panametrics Llc
5342-01-166-6882910079-6L INTERCHANGEABLE
Cap
Parker-Hannifin Corporation Dba Control Systems Division
4720-01-432-9961390PBA INTERCHANGEABLE
Fuel Line Assembly,diving
Tempo Products Co
Cross-Reference Index
Part NumberManufacturer
MST206 PRIMARY Bunzl Plastic Inc Dba Alliance Plastics (USA)
1604-206Y Robroy Industries Inc Pittsburgh Standard Conduit Co Div (USA)
2049W22P004 Ametek Inc Div Aerospace and Defense (USA)
1604-206Y Pennwalt Corp S S White Industrial Products Div (USA)
M-206 Robroy Industries Inc Robroy Plastics Div (USA)
1604-206 Robroy Industries Inc Robroy Plastics Div (USA)
Related Parts
5340-00-584-6403SUCCESSOR
NO ITEM NAME AVAILABLE
3455-00-059-5576INTERCHANGEABLE
CUTTER,MILLING,METAL SLITTING
07880
1610-00-081-3093INTERCHANGEABLE
CAP,SHIPPING
5310-00-423-9593INTERCHANGEABLE
WASHER,FLAT
5B426
5999-00-686-9935INTERCHANGEABLE
CAP,ELECTRICAL
5210-01-140-0188INTERCHANGEABLE
GAGE,THICKNESS TRANSDUCER
M206-RB
5342-01-166-6882INTERCHANGEABLE
CAP
910079-6L
4720-01-432-9961INTERCHANGEABLE
FUEL LINE ASSEMBLY,DIVING
390PBA

Frequently Asked Questions

What is NSN 5340-00-579-5669?

NSN 5340-00-579-5669 is a Cap,protective,dust and Moisture, manufactured by Bunzl Plastic Inc Dba Alliance Plastics, classified under FSC 5340 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5340-00-579-5669?

NSN 5340-00-579-5669 has 6 cross-referenced part numbers: MST206 (Bunzl Plastic Inc Dba Alliance Plastics), 1604-206Y (Robroy Industries Inc Pittsburgh Standard Conduit Co Div), 2049W22P004 (Ametek Inc Div Aerospace and Defense), 1604-206Y (Pennwalt Corp S S White Industrial Products Div), M-206 (Robroy Industries Inc Robroy Plastics Div) and 1 more.

What NSN replaces 5340-00-579-5669?

There are 8 known substitutes for 5340-00-579-5669: 5340-00-584-6403, 3455-00-059-5576, 1610-00-081-3093 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MST206?

Key specifications for MST206: Special Features: THREAD CLASS CAN ALSO BE 1A OR 3A A; Material: PLASTIC; Thread Size and Series/type Designator: 9/16-18 UNF; Overall Diameter: 0.750 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5340-00-579-5669 still in active supply?

NSN 5340-00-579-5669 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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