PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

188478-0030Support Seat

Marotta Controls Inc · NSN 4820-01-030-5231 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-030-5231 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-030-5231. Primary manufacturer part number: 188478-0030.
Features
  • Support Seat — FSC 4820
  • General Characteristics Item Description: MATERIAL CORROSION RESISTING STEEL,OD 0.561 IN.,FLANGE OD 0.678 IN.,ID 0.377 IN.,THICKNESS OVERALL 0.161 IN.,FLANGE THICKNESS 0.066 IN.,FACE GROOVE OD 0.527 IN.,FACE GROOVE ID 0.430 IN.,FACE GROOVE DEPTH 0.073 IN. IN
  • 4 verified cross-references
  • Primary manufacturer: Marotta Controls Inc
Applications
  • Flow control in piping systems
  • Water treatment infrastructure
  • Industrial process control
General Description

The Support Seat, cataloged under National Stock Number 4820-01-030-5231, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Marotta Controls Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-030-5231
Primary Part Number188478-0030
Item NameSupport Seat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMarotta Controls Inc
StatusCANCELLED
General Characteristics Item DescriptionMATERIAL CORROSION RESISTING STEEL,OD 0.561 IN.,FLANGE OD 0.678 IN.,ID 0.377 IN.,THICKNESS OVERALL 0.161 IN.,FLANGE THICKNESS 0.066 IN.,FACE GROOVE OD 0.527 IN.,FACE GROOVE ID 0.430 IN.,FACE GROOVE DEPTH 0.073 IN. IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
4820-01-031-1645188479-0081 INTERCHANGEABLE
Seat,valve
Marotta Controls Inc
6625-01-101-1003280038 INTERCHANGEABLE
Probe,tuning
Bae Systems Information and Electronic Systems Integration Inc.
4810-01-117-0145146712-0001 INTERCHANGEABLE
Retainer,seat,valve
Marotta Controls Inc
2530-01-161-6544280038N INTERCHANGEABLE
Treadle and Plate Assembly
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
4820-01-290-7293280038-21 INTERCHANGEABLE
Valve,relief,pressure and Temper
Marotta Controls Inc
4820-01-393-7507 INTERCHANGEABLE
Seat,valve
Cross-Reference Index
Part NumberManufacturer
280038ITEM17 Marotta Controls Inc (USA)
188478-0030 PRIMARY Marotta Controls Inc (USA)
188478-30 PRIMARY Marotta Controls Inc (USA)
280038 Marotta Controls Inc (USA)
Related Parts
4820-01-031-1645INTERCHANGEABLE
SEAT,VALVE
188479-0081
6625-01-101-1003INTERCHANGEABLE
PROBE,TUNING
280038
4810-01-117-0145INTERCHANGEABLE
RETAINER,SEAT,VALVE
146712-0001
2530-01-161-6544INTERCHANGEABLE
TREADLE AND PLATE ASSEMBLY
280038N
4820-01-290-7293INTERCHANGEABLE
VALVE,RELIEF,PRESSURE AND TEMPER
280038-21
4820-01-393-7507INTERCHANGEABLE
SEAT,VALVE

Frequently Asked Questions

What is NSN 4820-01-030-5231?

NSN 4820-01-030-5231 is a Support Seat, manufactured by Marotta Controls Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-030-5231?

NSN 4820-01-030-5231 has 4 cross-referenced part numbers: 280038ITEM17 (Marotta Controls Inc), 188478-0030 (Marotta Controls Inc), 188478-30 (Marotta Controls Inc), 280038 (Marotta Controls Inc).

What NSN replaces 4820-01-030-5231?

There are 6 known substitutes for 4820-01-030-5231: 4820-01-031-1645, 6625-01-101-1003, 4810-01-117-0145 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 188478-0030?

Key specifications for 188478-0030: General Characteristics Item Description: MATERIAL CORROSION RESISTING STEEL,OD 0.561 IN.,FLANGE OD 0.678 IN.,ID 0.377 IN.,THICKNESS OVERALL 0.161 IN.,FLANGE THICKNESS 0.066 IN.,FACE GROOVE OD 0.527 IN.,FACE GROOVE ID 0.430 IN.,FACE GROOVE DEPTH 0.073 IN. IN; End Item Identification: MAROTTA VALVE CORP PRESSURE REDUCING VALVE P/N 280038. 2 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-030-5231 still in active supply?

NSN 4820-01-030-5231 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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