PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18113Connector,duct

Hdt Expeditionary Systems Inc · NSN 4520-01-041-9259 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-01-041-9259 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-041-9259. Primary manufacturer part number: 18113.
Features
  • Connector,duct — FSC 4520
  • General Characteristics Item Description: 8.980 IN. OD,0.000 PORM 0.003 IN.,7.875 IN. ID,0.000 PORM 0.003 IN.,WITH 6 BOLT HOLES UNEVENLY SPACED IN
  • 3 verified cross-references
  • Primary manufacturer: Hdt Expeditionary Systems Inc
Applications
  • Electrical interconnection
  • Signal interface mating
  • Quick-disconnect coupling
General Description

The Connector,duct, cataloged under National Stock Number 4520-01-041-9259, is classified within Federal Supply Class 4520 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Hdt Expeditionary Systems Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, 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
NSN4520-01-041-9259
Primary Part Number18113
Item NameConnector,duct
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerHdt Expeditionary Systems Inc
StatusACTIVE
General Characteristics Item Description8.980 IN. OD,0.000 PORM 0.003 IN.,7.875 IN. ID,0.000 PORM 0.003 IN.,WITH 6 BOLT HOLES UNEVENLY SPACED IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
2810-00-118-6544 INTERCHANGEABLE
Pipe
4820-00-399-2818005-101-0016 INTERCHANGEABLE
Disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
2520-00-739-4867114-8113 INTERCHANGEABLE
Spider,universal Joint,vehicular
Rockford Powertrain Inc Div Powertrain Rockford, Inc.
5895-00-907-5086 INTERCHANGEABLE
Counterweight
6540-00-979-926918113 INTERCHANGEABLE
Pin,crank,ophthalmic Lens Surfac
Leica Inc Surveying and Photogrammetry Systems Div
5305-00-988-1171 INTERCHANGEABLE
Screw,machine
5940-01-048-660118113 INTERCHANGEABLE
Terminal Board
Unitron, Lp Dba Unitron Power Systems, Lp ; Atlas Marine Systems
5962-01-167-5678 INTERCHANGEABLE
Microcircuit,digital
5310-01-221-989424263 N PIECE 16 INTERCHANGEABLE
Washer,flat
Leslie Controls, Inc. Dba Leslie Controls Inc
5310-01-351-271618113 INTERCHANGEABLE
Nut,plain,hexagon
Coffin Turbo Pump Inc
Cross-Reference Index
Part NumberManufacturer
18113 Engineered Air Systems, Inc. Dba Drs Sustainment Systems (USA)
18113 PRIMARY Hdt Expeditionary Systems Inc (USA)
18113 Drs Environmental Systems Inc (USA)
Related Parts
2810-00-118-6544INTERCHANGEABLE
PIPE
4820-00-399-2818INTERCHANGEABLE
DISK,VALVE
005-101-0016
2520-00-739-4867INTERCHANGEABLE
SPIDER,UNIVERSAL JOINT,VEHICULAR
114-8113
5895-00-907-5086INTERCHANGEABLE
COUNTERWEIGHT
6540-00-979-9269INTERCHANGEABLE
PIN,CRANK,OPHTHALMIC LENS SURFAC
18113
5305-00-988-1171INTERCHANGEABLE
SCREW,MACHINE
5940-01-048-6601INTERCHANGEABLE
TERMINAL BOARD
18113
5962-01-167-5678INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5310-01-221-9894INTERCHANGEABLE
WASHER,FLAT
24263 N PIECE 16
5310-01-351-2716INTERCHANGEABLE
NUT,PLAIN,HEXAGON
18113

Frequently Asked Questions

What is NSN 4520-01-041-9259?

NSN 4520-01-041-9259 is a Connector,duct, manufactured by Hdt Expeditionary Systems Inc, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-01-041-9259?

NSN 4520-01-041-9259 has 3 cross-referenced part numbers: 18113 (Engineered Air Systems, Inc. Dba Drs Sustainment Systems), 18113 (Hdt Expeditionary Systems Inc), 18113 (Drs Environmental Systems Inc).

What NSN replaces 4520-01-041-9259?

There are 10 known substitutes for 4520-01-041-9259: 2810-00-118-6544, 4820-00-399-2818, 2520-00-739-4867 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18113?

Key specifications for 18113: General Characteristics Item Description: 8.980 IN. OD,0.000 PORM 0.003 IN.,7.875 IN. ID,0.000 PORM 0.003 IN.,WITH 6 BOLT HOLES UNEVENLY SPACED IN; End Item Identification: PT250-9/MC-1 AND PT250-10/MD-1. 2 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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