PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

673Seat,valve

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-220-9203 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-220-9203 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-220-9203. Primary manufacturer part number: 673.
Features
  • Seat,valve — FSC 4820
  • Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: STEEL CORROSION RESISTING OVERALL
  • 3 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 Steel Corrosion Resisting Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-220-9203, 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 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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
NSN4820-01-220-9203
Primary Part Number673
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Material Document and ClassificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL CORROSION RESISTING OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5310-00-186-0965 INTERCHANGEABLE
Washer,key
5120-00-473-76777082856 INTERCHANGEABLE
Wrench,cylinder Hol
U S Army Tank Automotive Command Amsta-Im-Mm
4320-00-565-1803673-0001 INTERCHANGEABLE
Impeller,pump,centrifugal
Itt Jabsco Products
5330-00-740-95537409553 INTERCHANGEABLE
Ring,wiper
U S Army Tank Automotive Command Amsta-Im-Mm
5950-00-834-9253722801-35 INTERCHANGEABLE
Transformer,power
Raytheon Company Div Rmd Strategic
2915-00-916-9786557061 INTERCHANGEABLE
Connector Assy,tube
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
4820-01-222-0258 INTERCHANGEABLE
Seat,valve
4820-01-222-0423507-01 INTERCHANGEABLE
Disk,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
5310-01-246-9335024973-0 INTERCHANGEABLE
Nut
Sea Cure Technology, Inc
6515-01-599-6376673 INTERCHANGEABLE
Rod,extractor-Compressor
Sign Fracture Care International Dba Sign
Cross-Reference Index
Part NumberManufacturer
673 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40524-8 PIECE 17 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40524-8 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
5310-00-186-0965INTERCHANGEABLE
WASHER,KEY
5120-00-473-7677INTERCHANGEABLE
WRENCH,CYLINDER HOL
7082856
4320-00-565-1803INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
673-0001
5330-00-740-9553INTERCHANGEABLE
RING,WIPER
7409553
5950-00-834-9253INTERCHANGEABLE
TRANSFORMER,POWER
722801-35
2915-00-916-9786INTERCHANGEABLE
CONNECTOR ASSY,TUBE
557061
4820-01-222-0258INTERCHANGEABLE
SEAT,VALVE
4820-01-222-0423INTERCHANGEABLE
DISK,VALVE
507-01
5310-01-246-9335INTERCHANGEABLE
NUT
024973-0
6515-01-599-6376INTERCHANGEABLE
ROD,EXTRACTOR-COMPRESSOR
673

Frequently Asked Questions

What is NSN 4820-01-220-9203?

NSN 4820-01-220-9203 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 4820-01-220-9203?

NSN 4820-01-220-9203 has 3 cross-referenced part numbers: 673 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40524-8 PIECE 17 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40524-8 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-220-9203?

There are 10 known substitutes for 4820-01-220-9203: 5310-00-186-0965, 5120-00-473-7677, 4320-00-565-1803 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 673?

Key specifications for 673: Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Material: STEEL CORROSION RESISTING OVERALL. 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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