PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1863-00Seat,valve

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-516-0326 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-516-0326 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-516-0326. Primary manufacturer part number: 1863-00.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: O-RING
  • Material: STEEL CORROSION RESISTING SEAT
  • Seal Accommodation Type: GROOVED
  • Material Document and Classification: ASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE SEAT
  • 4 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 Seat construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-516-0326, 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 4 verified specifications, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-516-0326
Primary Part Number1863-00
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Seating Surface ShapeO-RING
MaterialSTEEL CORROSION RESISTING SEAT
Seal Accommodation TypeGROOVED
Material Document and ClassificationASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE SEAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-370-84401863 INTERCHANGEABLE
Seal,plain Encased
Avox Systems Inc Dba Avox Systems Inc
5330-00-695-90048713442 INTERCHANGEABLE
Packing,preformed
U S Army Tank Automotive Command Amsta-Im-Mm
5950-00-710-564310863 INTERCHANGEABLE
Coil,radio Frequency
Vanguard Electronics, Llc
2840-00-775-4461406128 INTERCHANGEABLE
Seal,air,aircraft Gas Turbine En
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
5950-00-916-3971C2020-3 INTERCHANGEABLE
Transformer,power Autotransforme
Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company
6625-00-958-04591086-3 INTERCHANGEABLE
Shunt,instrument
Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc
4920-01-065-386710863 INTERCHANGEABLE
Fixture,aircraft Maintenance
Technical Heaters, Inc. Dba Technical Heaters Inc
5305-01-112-6087 INTERCHANGEABLE
Screw,machine
3930-01-125-641810863-8 INTERCHANGEABLE
Parts Kit,linear Actuating Cylin
Landoll Company, Llc
5310-01-126-7393398579-01 INTERCHANGEABLE
Nut,pump,shaft
Curtiss-Wright Electro-Mechanical Corporation Div Epd
Cross-Reference Index
Part NumberManufacturer
40612-8 PC NO 30 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
10863 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
1863-00 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40612-8 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
5330-00-370-8440INTERCHANGEABLE
SEAL,PLAIN ENCASED
1863
5330-00-695-9004INTERCHANGEABLE
PACKING,PREFORMED
8713442
5950-00-710-5643INTERCHANGEABLE
COIL,RADIO FREQUENCY
10863
2840-00-775-4461INTERCHANGEABLE
SEAL,AIR,AIRCRAFT GAS TURBINE EN
406128
5950-00-916-3971INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
C2020-3
6625-00-958-0459INTERCHANGEABLE
SHUNT,INSTRUMENT
1086-3
4920-01-065-3867INTERCHANGEABLE
FIXTURE,AIRCRAFT MAINTENANCE
10863
5305-01-112-6087INTERCHANGEABLE
SCREW,MACHINE
3930-01-125-6418INTERCHANGEABLE
PARTS KIT,LINEAR ACTUATING CYLIN
10863-8
5310-01-126-7393INTERCHANGEABLE
NUT,PUMP,SHAFT
398579-01
3020-01-503-2453INTERCHANGEABLE
GEAR,SPUR
10863
4820-01-516-0320INTERCHANGEABLE
PISTON,VALVE
40612-8 PC NO 25

Frequently Asked Questions

What is NSN 4820-01-516-0326?

NSN 4820-01-516-0326 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 4820-01-516-0326?

NSN 4820-01-516-0326 has 4 cross-referenced part numbers: 40612-8 PC NO 30 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 10863 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 1863-00 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40612-8 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-516-0326?

There are 12 known substitutes for 4820-01-516-0326: 5330-00-370-8440, 5330-00-695-9004, 5950-00-710-5643 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1863-00?

Key specifications for 1863-00: Seating Surface Shape: O-RING; Material: STEEL CORROSION RESISTING SEAT; Seal Accommodation Type: GROOVED; Material Document and Classification: ASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE SEAT. 4 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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