PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SIZE55ACap-Plug,protective,dust and Moi

Protective Closures Co Inc · NSN 5340-00-290-7230 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-290-7230 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-290-7230. Primary manufacturer part number: SIZE55A.
Features
  • Cap-Plug,protective,dust and Moi — FSC 5340
  • Material: PLASTIC
  • Closed End Overall Diameter: 2.982 INCHES NOMINAL IN
  • Length Under Shoulder: 1.000 INCHES NOMINAL IN
  • Open End Inside Diameter: 3.175 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Protective Closures Co Inc
Applications
  • Applications requiring Plastic construction
General Description

The Cap-Plug,protective,dust and Moi, cataloged under National Stock Number 5340-00-290-7230, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Protective Closures Co Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5340-00-290-7230
Primary Part NumberSIZE55A
Item NameCap-Plug,protective,dust and Moi
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerProtective Closures Co Inc
StatusACTIVE
MaterialPLASTIC
Closed End Overall Diameter2.982 INCHES NOMINAL IN
Length Under Shoulder1.000 INCHES NOMINAL IN
Open End Inside Diameter3.175 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5340-00-264-120328901-17 SUCCESSOR
Cap-Plug,protective,dust and Moi
Triumph Engine Control Systems Llc
Cap-Plug,protective,dust and Moi
5340-00-290-722357A SUCCESSOR
Cap-Plug,protective,dust and Moi
Caplugs Llc Dba Mokon Div Caplugs
Cap-Plug,protective,dust and Moi
5340-00-290-72496735707-23 SUCCESSOR
Cap-Plug,protective,dust and Moi
Allison Transmission Inc Dba Allison Transmission, Inc
5340-00-290-725115 SUCCESSOR
Cap-Plug,protective,dust and Moi
Allison Transmission Inc Dba Allison Transmission, Inc
Cap-Plug,protective,dust and Moi
5340-00-597-45433-X SUCCESSOR
Cap-Plug,protective,dust and Moi
Caplugs Llc Dba Mokon Div Caplugs
5340-01-104-0373NAS834-33 SUCCESSOR
Cap-Plug,protective,dust and Moi
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-01-113-0878NAS834-11 SUCCESSOR
Cap-Plug,protective,dust and Moi
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
SIZE55A Protective Closures Co Inc (USA)
MILC52078 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5340-00-264-1203SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
28901-17
5340-00-264-1208SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
5340-00-290-7223SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
57A
5340-00-290-7228SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
5340-00-290-7249SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
6735707-23
5340-00-290-7251SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
15
5340-00-290-7263SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
5340-00-597-4543SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
3-X
5340-01-104-0373SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
NAS834-33
5340-01-113-0878SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
NAS834-11
5340-01-139-9162SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
5340-01-237-2903SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI

Frequently Asked Questions

What is NSN 5340-00-290-7230?

NSN 5340-00-290-7230 is a Cap-Plug,protective,dust and Moi, manufactured by Protective Closures Co Inc, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-290-7230?

NSN 5340-00-290-7230 has 2 cross-referenced part numbers: SIZE55A (Protective Closures Co Inc), MILC52078 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5340-00-290-7230?

There are 12 known substitutes for 5340-00-290-7230: 5340-00-264-1203, 5340-00-264-1208, 5340-00-290-7223 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SIZE55A?

Key specifications for SIZE55A: Material: PLASTIC; Closed End Overall Diameter: 2.982 INCHES NOMINAL IN; Length Under Shoulder: 1.000 INCHES NOMINAL IN; Open End Inside Diameter: 3.175 INCHES NOMINAL IN. 4 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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