PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40103Seat,valve

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-165-5889 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-165-5889 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-165-5889. Primary manufacturer part number: 40103.
Features
  • Seat,valve — FSC 4820
  • Material: NICKEL ALLOY 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 Nickel Alloy Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-165-5889, 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 3 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
NSN4820-01-165-5889
Primary Part Number40103
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
MaterialNICKEL ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-156-8102SMN100K+COL INTERCHANGEABLE
Bearing,ball,annular
Timken Co Div the Timken Company
3120-00-216-93672491 INTERCHANGEABLE
Bearing Assembly
Northrop Grumman Systems Corporation Div Marine Systems
6680-00-358-1958249-1 INTERCHANGEABLE
Indicator,electrical Tachometer
The Dewey Electronics Corporation Div Pitometer Log Division
1420-00-446-52194010-3 INTERCHANGEABLE
Insert,retaining
Hamilton Sundstrand Corporation
5340-00-497-8670249-1 INTERCHANGEABLE
Snap Hook
Buckles International, Inc.
1630-00-607-84479430273 INTERCHANGEABLE
Wheel,landing Gear
Meggitt Aircraft Braking Systems Corporation
5330-00-630-1793710501 INTERCHANGEABLE
Gasket
Hamilton Sundstrand Corporation
5905-00-636-9263 INTERCHANGEABLE
Resistor Assembly
5940-00-825-2624012-2007-479 INTERCHANGEABLE
Terminal,feedthru
Itt Cannon Rf Products
2805-00-830-38796B4833 INTERCHANGEABLE
Ring Piston
Caterpillar Inc Div Caterpillar Defense
Cross-Reference Index
Part NumberManufacturer
40103 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
249-1 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40103 PIECE 35 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
3110-00-156-8102INTERCHANGEABLE
BEARING,BALL,ANNULAR
SMN100K+COL
3120-00-216-9367INTERCHANGEABLE
BEARING ASSEMBLY
2491
6680-00-358-1958INTERCHANGEABLE
INDICATOR,ELECTRICAL TACHOMETER
249-1
1420-00-446-5219INTERCHANGEABLE
INSERT,RETAINING
4010-3
5340-00-497-8670INTERCHANGEABLE
SNAP HOOK
249-1
1630-00-607-8447INTERCHANGEABLE
WHEEL,LANDING GEAR
9430273
5330-00-630-1793INTERCHANGEABLE
GASKET
710501
5905-00-636-9263INTERCHANGEABLE
RESISTOR ASSEMBLY
5940-00-825-2624INTERCHANGEABLE
TERMINAL,FEEDTHRU
012-2007-479
2805-00-830-3879INTERCHANGEABLE
RING PISTON
6B4833
5915-00-879-2490INTERCHANGEABLE
FILTER,LOW PASS
SM-A-763726
6210-01-113-5942INTERCHANGEABLE
LIGHT,INDICATOR
2-49-1

Frequently Asked Questions

What is NSN 4820-01-165-5889?

NSN 4820-01-165-5889 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 4820-01-165-5889?

NSN 4820-01-165-5889 has 3 cross-referenced part numbers: 40103 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 249-1 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40103 PIECE 35 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-165-5889?

There are 12 known substitutes for 4820-01-165-5889: 3110-00-156-8102, 3120-00-216-9367, 6680-00-358-1958 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40103?

Key specifications for 40103: Material: NICKEL ALLOY OVERALL. 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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