PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-C-5501/3Cap,protective,dust and Moisture

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5340-00-808-2181 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-808-2181 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-808-2181. Primary manufacturer part number: MIL-C-5501/3.
Features
  • Cap,protective,dust and Moisture — FSC 5340
  • Design Type: THREADED
  • Thread Size and Series/type Designator: 12N 1-1/16-12 N
  • Overall Diameter: 1.750 INCHES NOMINAL IN
  • Nondefinitive Spec/std Data: 2 TYPE AND C CLASS AND 12 SIZE
  • 2 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-00-808-2181, 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 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5340-00-808-2181
Primary Part NumberMIL-C-5501/3
Item NameCap,protective,dust and Moisture
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Design TypeTHREADED
Thread Size and Series/type Designator12N 1-1/16-12 N
Overall Diameter1.750 INCHES NOMINAL IN
Nondefinitive Spec/std Data2 TYPE AND C CLASS AND 12 SIZE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5340-01-016-8180NAS835-6A SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-01-030-4467NAS814-8B SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-01-081-8282NAS835-4A SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-01-112-2822NAS832-4 SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-01-138-2165NAS835-8A SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cap,protective,dust and Moisture
5340-01-212-4978NAS835N3A SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-01-298-3015NAS835-20 SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-01-355-8455NAS835N5A SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5340-01-371-9555NAS835N6A SUCCESSOR
Cap,protective,dust and Moisture
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
MIL-C-5501/3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M5501/3-112 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5340-01-016-8180SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS835-6A
5340-01-030-4467SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS814-8B
5340-01-081-8282SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS835-4A
5340-01-112-2822SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS832-4
5340-01-138-2165SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS835-8A
5340-01-146-9730SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
5340-01-212-4978SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS835N3A
5340-01-298-3015SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS835-20
5340-01-355-8455SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS835N5A
5340-01-371-9555SUCCESSOR
CAP,PROTECTIVE,DUST AND MOISTURE
NAS835N6A

Frequently Asked Questions

What is NSN 5340-00-808-2181?

NSN 5340-00-808-2181 is a Cap,protective,dust and Moisture, 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 5340-00-808-2181?

NSN 5340-00-808-2181 has 2 cross-referenced part numbers: MIL-C-5501/3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M5501/3-112 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5340-00-808-2181?

There are 10 known substitutes for 5340-00-808-2181: 5340-01-016-8180, 5340-01-030-4467, 5340-01-081-8282 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-C-5501/3?

Key specifications for MIL-C-5501/3: Design Type: THREADED; Thread Size and Series/type Designator: 12N 1-1/16-12 N; Overall Diameter: 1.750 INCHES NOMINAL IN; Nondefinitive Spec/std Data: 2 TYPE AND C CLASS AND 12 SIZE. 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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