PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

212-00 ITEM 20Seat,valve

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-309-3404 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-309-3404 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-309-3404. Primary manufacturer part number: 212-00 ITEM 20.
Features
  • Seat,valve — FSC 4820
  • Material: COPPER ALLOY SEAT
  • 2 verified cross-references
  • Primary manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Seat construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-309-3404, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 1 verified specification, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-309-3404
Primary Part Number212-00 ITEM 20
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
MaterialCOPPER ALLOY SEAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5935-00-135-20853281-2241-00 INTERCHANGEABLE
Adapter,connector
Tyco Electronics Corp
6685-00-245-7696ASTM 58F INTERCHANGEABLE
Thermometer,self-Indicating
American Society for Testing and Materials Dba Astm International
5305-00-335-378812100 INTERCHANGEABLE
Screw
Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems
3820-00-429-97757060-004 INTERCHANGEABLE
Window,gage
Terex Usa, Llc Dba Terex Equipment Services
5340-00-634-735721200 INTERCHANGEABLE
Handwheel
Northrop Grumman Systems Corporation Div Marine Systems
9540-00-805-6440 INTERCHANGEABLE
Structural Section,special Shape
5945-01-157-068521-200 INTERCHANGEABLE
Relay,hybrid
Te Connectivity Corporation
7350-01-256-108621200 INTERCHANGEABLE
Plate,eating
Babco International Inc
9390-01-342-7501 INTERCHANGEABLE
Tape,reflective
6550-01-359-5093R21200 INTERCHANGEABLE
Naphthol
Remel Inc.
Cross-Reference Index
Part NumberManufacturer
212-00 ITEM 20 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
212-00 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
5935-00-135-2085INTERCHANGEABLE
ADAPTER,CONNECTOR
3281-2241-00
6685-00-245-7696INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
ASTM 58F
5305-00-335-3788INTERCHANGEABLE
SCREW
12100
3820-00-429-9775INTERCHANGEABLE
WINDOW,GAGE
7060-004
5340-00-634-7357INTERCHANGEABLE
HANDWHEEL
21200
9540-00-805-6440INTERCHANGEABLE
STRUCTURAL SECTION,SPECIAL SHAPE
5945-01-157-0685INTERCHANGEABLE
RELAY,HYBRID
21-200
7350-01-256-1086INTERCHANGEABLE
PLATE,EATING
21200
9390-01-342-7501INTERCHANGEABLE
TAPE,REFLECTIVE
6550-01-359-5093INTERCHANGEABLE
NAPHTHOL
R21200
4820-01-419-2547INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21200-001
4820-01-419-2621INTERCHANGEABLE
PISTON,VALVE

Frequently Asked Questions

What is NSN 4820-01-309-3404?

NSN 4820-01-309-3404 is a Seat,valve, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-309-3404?

NSN 4820-01-309-3404 has 2 cross-referenced part numbers: 212-00 ITEM 20 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 212-00 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-309-3404?

There are 12 known substitutes for 4820-01-309-3404: 5935-00-135-2085, 6685-00-245-7696, 5305-00-335-3788 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 212-00 ITEM 20?

Key specifications for 212-00 ITEM 20: Material: COPPER ALLOY SEAT. 1 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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