PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILC52078Cap-Plug,protective,dust and Moi

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5340-01-237-2903 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-237-2903 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-237-2903. Primary manufacturer part number: MILC52078.
Features
  • Cap-Plug,protective,dust and Moi — FSC 5340
  • Material Document and Classification: L-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
  • Material: PLASTIC, POLYETHYLENE (PP)
  • Closed End Overall Diameter: 1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN
  • Open End Inside Diameter: 1.830 INCHES MINIMUM AND 1.850 INCHES MAXIMUM IN
  • Length Under Shoulder: 0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
  • 3 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Applications requiring Plastic, Polyethylene (pp) construction
General Description

The Cap-Plug,protective,dust and Moi, cataloged under National Stock Number 5340-01-237-2903, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-01-237-2903
Primary Part NumberMILC52078
Item NameCap-Plug,protective,dust and Moi
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Material Document and ClassificationL-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
MaterialPLASTIC, POLYETHYLENE (PP)
Closed End Overall Diameter1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN
Open End Inside Diameter1.830 INCHES MINIMUM AND 1.850 INCHES MAXIMUM IN
Length Under Shoulder0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5340-00-286-3511
HAZMATNo
Unit of IssueEA
Verified Substitutes 12
5340-00-286-3506NAS834-117 SUCCESSOR
Cap-Plug,protective,dust and Moi
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-00-286-3507NAS834-151 SUCCESSOR
Cap-Plug,protective,dust and Moi
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cap-Plug,protective,dust and Moi
5340-00-290-721317 SUCCESSOR
Cap-Plug,protective,dust and Moi
Caplugs Llc Dba Mokon Div Caplugs
5340-00-290-72150S025262 SUCCESSOR
Cap-Plug,protective,dust and Moi
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5340-00-290-72217 SUCCESSOR
Cap-Plug,protective,dust and Moi
Caplugs Llc Dba Mokon Div Caplugs
5340-00-290-7226T-96A SUCCESSOR
Cap-Plug,protective,dust and Moi
Caplugs Llc Dba Mokon Div Caplugs
5340-00-290-722953 SUCCESSOR
Cap-Plug,protective,dust and Moi
Caplugs Llc Dba Mokon Div Caplugs
Cap-Plug,protective,dust and Moi
5340-00-290-72341296631-2 SUCCESSOR
Plug,protective,dust and Moistur
Honeywell Intl Inc Defense Avionics Systems
Cross-Reference Index
Part NumberManufacturer
MILC52078 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-C-5501/7 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M5501/7-F31 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
SUCCESSOR 5340-00-286-3511 Cap-Plug,protective,dust and Moi
5340-00-286-3506SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
NAS834-117
5340-00-286-3507SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
NAS834-151
5340-00-290-7213SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
17
5340-00-290-7215SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
0S025262
5340-00-290-7221SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
7
5340-00-290-7226SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
T-96A
5340-00-290-7229SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
53
5340-00-290-7230SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
5340-00-290-7234SUCCESSOR
PLUG,PROTECTIVE,DUST AND MOISTUR
1296631-2
5340-00-290-7236SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
24S
5340-00-290-7239SUCCESSOR
CAP-PLUG,PROTECTIVE,DUST AND MOI
SIZE220

Frequently Asked Questions

What is NSN 5340-01-237-2903?

NSN 5340-01-237-2903 is a Cap-Plug,protective,dust and Moi, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-01-237-2903?

NSN 5340-01-237-2903 has 3 cross-referenced part numbers: MILC52078 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-C-5501/7 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M5501/7-F31 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5340-01-237-2903?

There are 12 known substitutes for 5340-01-237-2903: 5340-00-286-3506, 5340-00-286-3507, 5340-00-286-3511 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILC52078?

Key specifications for MILC52078: Material Document and Classification: L-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE; Material: PLASTIC, POLYETHYLENE (PP); Closed End Overall Diameter: 1.890 INCHES MINIMUM AND 1.910 INCHES MAXIMUM IN; Open End Inside Diameter: 1.830 INCHES MINIMUM AND 1.850 INCHES MAXIMUM IN. 5 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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