PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18052Ring Dam and Fitting Assembly

Hdt Expeditionary Systems Inc · NSN 4520-01-042-3054 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-01-042-3054 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-042-3054. Primary manufacturer part number: 18052.
Features
  • Ring Dam and Fitting Assembly — FSC 4520
  • General Characteristics Item Description: COMPONENTS,FITTING,DRAIN 1,P/N TO807,DAM,ATTACHING RING 1,P/N TA353,RING,ATTACHING 1,P/N TA312 AND SCREW,WELD 4,P/N HW2710
  • 3 verified cross-references
  • Primary manufacturer: Hdt Expeditionary Systems Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ring Dam and Fitting Assembly, cataloged under National Stock Number 4520-01-042-3054, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-01-042-3054
Primary Part Number18052
Item NameRing Dam and Fitting Assembly
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerHdt Expeditionary Systems Inc
StatusACTIVE
General Characteristics Item DescriptionCOMPONENTS,FITTING,DRAIN 1,P/N TO807,DAM,ATTACHING RING 1,P/N TA353,RING,ATTACHING 1,P/N TA312 AND SCREW,WELD 4,P/N HW2710
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5133-00-189-9297 INTERCHANGEABLE
Drill,twist
4730-00-221-2137AS4863SIZE02 MOD INTERCHANGEABLE
Plug,pipe
Sae International Dba Sae International
6210-00-299-4950 INTERCHANGEABLE
Light,indicator
2805-00-333-4330 INTERCHANGEABLE
Baffle,airflow,nonaircraft Recip
5950-00-577-3062 INTERCHANGEABLE
Transformer,audio Frequency
5305-00-589-4354 INTERCHANGEABLE
Screw Assembly
9540-00-805-6445 INTERCHANGEABLE
Structural Section,special Shape
5330-01-012-2477 INTERCHANGEABLE
Seal,plain Encased
5930-01-180-8216CA201-73 INTERCHANGEABLE
Switch,toggle
Carling Technologies, Inc Dba Carlingswitch
3110-01-408-589418052 INTERCHANGEABLE
Bearing,ball,duplex
Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings
Cross-Reference Index
Part NumberManufacturer
18052 Drs Environmental Systems Inc (USA)
18052 Engineered Air Systems, Inc. Dba Drs Sustainment Systems (USA)
18052 PRIMARY Hdt Expeditionary Systems Inc (USA)
Related Parts
5133-00-189-9297INTERCHANGEABLE
DRILL,TWIST
4730-00-221-2137INTERCHANGEABLE
PLUG,PIPE
AS4863SIZE02 MOD
6210-00-299-4950INTERCHANGEABLE
LIGHT,INDICATOR
2805-00-333-4330INTERCHANGEABLE
BAFFLE,AIRFLOW,NONAIRCRAFT RECIP
5950-00-577-3062INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5305-00-589-4354INTERCHANGEABLE
SCREW ASSEMBLY
9540-00-805-6445INTERCHANGEABLE
STRUCTURAL SECTION,SPECIAL SHAPE
5330-01-012-2477INTERCHANGEABLE
SEAL,PLAIN ENCASED
5930-01-180-8216INTERCHANGEABLE
SWITCH,TOGGLE
CA201-73
3110-01-408-5894INTERCHANGEABLE
BEARING,BALL,DUPLEX
18052
6515-01-572-4529INTERCHANGEABLE
ARALDITE EMBEDDING KIT
18052
6515-01-586-4480INTERCHANGEABLE
ELECTRODE,PERIPHERAL NERVE STIMU
A10011

Frequently Asked Questions

What is NSN 4520-01-042-3054?

NSN 4520-01-042-3054 is a Ring Dam and Fitting Assembly, manufactured by Hdt Expeditionary Systems Inc, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-01-042-3054?

NSN 4520-01-042-3054 has 3 cross-referenced part numbers: 18052 (Drs Environmental Systems Inc), 18052 (Engineered Air Systems, Inc. Dba Drs Sustainment Systems), 18052 (Hdt Expeditionary Systems Inc).

What NSN replaces 4520-01-042-3054?

There are 12 known substitutes for 4520-01-042-3054: 5133-00-189-9297, 4730-00-221-2137, 6210-00-299-4950 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18052?

Key specifications for 18052: General Characteristics Item Description: COMPONENTS,FITTING,DRAIN 1,P/N TO807,DAM,ATTACHING RING 1,P/N TA353,RING,ATTACHING 1,P/N TA312 AND SCREW,WELD 4,P/N HW2710; 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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