PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

691583Insert,engine Valve Seat

Briggs and Stratton Corp · NSN 2805-00-423-3278 · FSC 2805 · No Item Name Available
Verified by PartsTable
NSN 2805-00-423-3278 — this item is cataloged by the U.S. Government under National Stock Number 2805-00-423-3278. Primary manufacturer part number: 691583.
Features
  • Insert,engine Valve Seat — FSC 2805
  • Body Outside Diameter: 1.341 INCHES NOMINAL IN
  • Seat Angle in Deg: 0.750 NOMINAL
  • Hardness Rating: 50.0 ROCKWELL C MINIMUM BODY
  • Material: STEEL CORROSION RESISTING OVERALL
  • Hardness Rating: 55.0 ROCKWELL C MAXIMUM FACE
  • Seating Surface Shape: ANGULAR
  • Style Designator: PLAIN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Mechanical power generation
  • Drive system operation
General Description

The Insert,engine Valve Seat, cataloged under National Stock Number 2805-00-423-3278, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Briggs and Stratton Corp. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2805-00-423-3278
Primary Part Number691583
Item NameInsert,engine Valve Seat
FSC / FSG2805 / 28 — No Item Name Available
ManufacturerBriggs and Stratton Corp
StatusACTIVE
Body Outside Diameter1.341 INCHES NOMINAL IN
Seat Angle in Deg0.750 NOMINAL
Hardness Rating50.0 ROCKWELL C MINIMUM BODY
MaterialSTEEL CORROSION RESISTING OVERALL
Hardness Rating55.0 ROCKWELL C MAXIMUM FACE
Seating Surface ShapeANGULAR
Style DesignatorPLAIN
Body Inside Diameter1.130 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5977-00-038-1499 INTERCHANGEABLE
Brush,electrical Contact
5315-00-089-010721612 INTERCHANGEABLE
Pin,straight,headless
Unison Industries Llc
5360-00-265-585969-1583 INTERCHANGEABLE
Spring,helical,compression
Eaton Corp Opns & Technical Center
5365-00-514-25016166350 INTERCHANGEABLE
Shim
U S Army Tank Automotive Command Amsta-Im-Mm
4820-00-563-6316216-12 INTERCHANGEABLE
Disk,valve
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
5310-00-687-719921612 INTERCHANGEABLE
Washer,lock
Industrial Technologies and Services Llc
5950-01-068-5177240-0873-020 INTERCHANGEABLE
Coil,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
4320-01-447-660321612 INTERCHANGEABLE
Seal Assembly,shaft,spring Loade
Coffin Turbo Pump Inc
Cross-Reference Index
Part NumberManufacturer
21612 Briggs and Stratton Corp (USA)
691583 PRIMARY Briggs and Stratton Corp (USA)
JHP13-101 Hollingsworth John R Co (USA)
21612 Briggs & Stratton Uk Ltd (GBR)
Related Parts
5977-00-038-1499INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
5315-00-089-0107INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
21612
5360-00-265-5859INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
69-1583
5365-00-514-2501INTERCHANGEABLE
SHIM
6166350
4820-00-563-6316INTERCHANGEABLE
DISK,VALVE
216-12
5310-00-687-7199INTERCHANGEABLE
WASHER,LOCK
21612
5950-01-068-5177INTERCHANGEABLE
COIL,RADIO FREQUENCY
240-0873-020
4320-01-447-6603INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT,SPRING LOADE
21612

Frequently Asked Questions

What is NSN 2805-00-423-3278?

NSN 2805-00-423-3278 is a Insert,engine Valve Seat, manufactured by Briggs and Stratton Corp, classified under FSC 2805 (No Item Name Available). Status: active.

What are the part numbers for NSN 2805-00-423-3278?

NSN 2805-00-423-3278 has 4 cross-referenced part numbers: 21612 (Briggs and Stratton Corp), 691583 (Briggs and Stratton Corp), JHP13-101 (Hollingsworth John R Co), 21612 (Briggs & Stratton Uk Ltd).

What NSN replaces 2805-00-423-3278?

There are 8 known substitutes for 2805-00-423-3278: 5977-00-038-1499, 5315-00-089-0107, 5360-00-265-5859 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 691583?

Key specifications for 691583: Body Outside Diameter: 1.341 INCHES NOMINAL IN; Seat Angle in Deg: 0.750 NOMINAL; Hardness Rating: 50.0 ROCKWELL C MINIMUM BODY; Material: STEEL CORROSION RESISTING OVERALL. 9 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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