PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

803975Tappet Seat

Thor Power Tool Co Sub of Stewart-Warner Co · NSN 3820-00-429-7604 · FSC 3820 · No Item Name Available
Verified by PartsTable
NSN 3820-00-429-7604 — this item is cataloged by the U.S. Government under National Stock Number 3820-00-429-7604. Primary manufacturer part number: 803975.
Features
  • Tappet Seat — FSC 3820
  • General Characteristics Item Description: STEEL; 6.125 IN. LG O/A 4.000 IN. W O/A; CENTER SECTION IS 0.750 IN. THK; HAS HUB ON EACH SIDE,1ST HUB IS 2.750 IN. OD,0.500 IN. LG,2ND HUB IS 2.625 IN. OD,0.937 IN. LG; HAS 1.375 IN. DIA BORE,COUNTERBORED 1.750 IN. DIA,1-312 IN. DP; ALSO HAS 2 HOLES IN CENTER SECTION 180 DEG APART,0.750 IN. DIA,4.500 IN. APART IN
  • 3 verified cross-references
  • Primary manufacturer: Thor Power Tool Co Sub of Stewart-Warner Co
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Tappet Seat, cataloged under National Stock Number 3820-00-429-7604, is classified within Federal Supply Class 3820 (No Item Name Available) of the Construction, Mining, Excavating Equipment group. The primary manufacturer of record is Thor Power Tool Co Sub of Stewart-Warner Co. 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3820-00-429-7604
Primary Part Number803975
Item NameTappet Seat
FSC / FSG3820 / 38 — No Item Name Available
ManufacturerThor Power Tool Co Sub of Stewart-Warner Co
StatusACTIVE
General Characteristics Item DescriptionSTEEL; 6.125 IN. LG O/A 4.000 IN. W O/A; CENTER SECTION IS 0.750 IN. THK; HAS HUB ON EACH SIDE,1ST HUB IS 2.750 IN. OD,0.500 IN. LG,2ND HUB IS 2.625 IN. OD,0.937 IN. LG; HAS 1.375 IN. DIA BORE,COUNTERBORED 1.750 IN. DIA,1-312 IN. DP; ALSO HAS 2 HOLES IN CENTER SECTION 180 DEG APART,0.750 IN. DIA,4.500 IN. APART IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4220-00-555-0785 INTERCHANGEABLE
Life Raft,inflatable
6130-00-669-5329TYU1B1S1G INTERCHANGEABLE
Rectifier,metallic
Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility
6130-01-364-1256 INTERCHANGEABLE
Inverter,power,static
Cross-Reference Index
Part NumberManufacturer
803975 Thor Power Tool Co Sub of Stewart-Warner Co (USA)
43409 Thor Power Tool Co Sub of Stewart-Warner Co (USA)
C2019 Thor Power Tool Co Sub of Stewart-Warner Co (USA)
Related Parts
4220-00-555-0785INTERCHANGEABLE
LIFE RAFT,INFLATABLE
6130-00-669-5329INTERCHANGEABLE
RECTIFIER,METALLIC
TYU1B1S1G
6130-01-364-1256INTERCHANGEABLE
INVERTER,POWER,STATIC

Frequently Asked Questions

What is NSN 3820-00-429-7604?

NSN 3820-00-429-7604 is a Tappet Seat, manufactured by Thor Power Tool Co Sub of Stewart-Warner Co, classified under FSC 3820 (No Item Name Available). Status: active.

What are the part numbers for NSN 3820-00-429-7604?

NSN 3820-00-429-7604 has 3 cross-referenced part numbers: 803975 (Thor Power Tool Co Sub of Stewart-Warner Co), 43409 (Thor Power Tool Co Sub of Stewart-Warner Co), C2019 (Thor Power Tool Co Sub of Stewart-Warner Co).

What NSN replaces 3820-00-429-7604?

There are 3 known substitutes for 3820-00-429-7604: 4220-00-555-0785, 6130-00-669-5329, 6130-01-364-1256. Verify interchangeability with system specifications before substitution.

What are the specifications of 803975?

Key specifications for 803975: General Characteristics Item Description: STEEL; 6.125 IN. LG O/A 4.000 IN. W O/A; CENTER SECTION IS 0.750 IN. THK; HAS HUB ON EACH SIDE,1ST HUB IS 2.750 IN. OD,0.500 IN. LG,2ND HUB IS 2.625 IN. OD,0.937 IN. LG; HAS 1.375 IN. DIA BORE,COUNTERBORED 1.750 IN. DIA,1-312 IN. DP; ALSO HAS 2 HOLES IN CENTER SECTION 180 DEG APART,0.750 IN. DIA,4.500 IN. APART IN. 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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