PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S1673Valve,poppet,engine

Eaton Corp Dba Eaton Aerospace Jackson · NSN 2805-00-624-3682 · FSC 2805 · No Item Name Available
Verified by PartsTable
NSN 2805-00-624-3682 — this item is cataloged by the U.S. Government under National Stock Number 2805-00-624-3682. Primary manufacturer part number: S1673.
Features
  • Valve,poppet,engine — FSC 2805
  • Carbon Relief Groove: NOT INCLUDED
  • Head Style: MUSHROOM
  • Neck Radius: 0.3750 INCHES NOMINAL IN
  • First Groove Diameter: 0.2790 INCHES MINIMUM AND 0.2850 INCHES MAXIMUM IN
  • Outside Diameter: 1.3700 INCHES MINIMUM AND 1.3800 INCHES MAXIMUM IN
  • First Groove Width: 0.0950 INCHES MINIMUM AND 0.1050 INCHES MAXIMUM IN
  • Metallic Hardness Rating and Location: 35.5 ROCKWELL C MINIMUM OVERALL
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Mechanical power generation
  • Drive system operation
General Description

The Valve,poppet,engine, cataloged under National Stock Number 2805-00-624-3682, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Eaton Corp Dba Eaton Aerospace Jackson. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 15 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN2805-00-624-3682
Primary Part NumberS1673
Item NameValve,poppet,engine
FSC / FSG2805 / 28 — No Item Name Available
ManufacturerEaton Corp Dba Eaton Aerospace Jackson
StatusCANCELLED
Carbon Relief GrooveNOT INCLUDED
Head StyleMUSHROOM
Neck Radius0.3750 INCHES NOMINAL IN
First Groove Diameter0.2790 INCHES MINIMUM AND 0.2850 INCHES MAXIMUM IN
Outside Diameter1.3700 INCHES MINIMUM AND 1.3800 INCHES MAXIMUM IN
First Groove Width0.0950 INCHES MINIMUM AND 0.1050 INCHES MAXIMUM IN
Metallic Hardness Rating and Location35.5 ROCKWELL C MINIMUM OVERALL
FSC Application DataGASOLINE ENGINE
Head Height0.1602 INCHES MINIMUM AND 0.1812 INCHES MAXIMUM IN
Chamfer Angle in Deg30.0
Second Groove Width0.2790 INCHES MINIMUM AND 0.2840 INCHES MAXIMUM IN
Stem StyleDOUBLE GROOVED
Seat Angle in Deg45.0
Distance From Second Groove to Stem End0.6857 INCHES MINIMUM AND 0.6957 INCHES MAXIMUM IN
Metallic Hardness Rating and Location43.1 ROCKWELL C MAXIMUM OVERALL
Stem Length5.2145 INCHES MINIMUM AND 5.2245 INCHES MAXIMUM IN
Chamfer Length0.0312 INCHES NOMINAL IN
Distance From First Groove to Stem End0.2380 INCHES MINIMUM AND 0.2480 INCHES MAXIMUM IN
Stem Diameter0.3405 INCHES MINIMUM AND 0.3415 INCHES MAXIMUM IN
Second Groove Diameter0.2980 INCHES MINIMUM AND 0.3040 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
3110-00-100-6209 INTERCHANGEABLE
Ball,bearing
6115-00-877-3001V1374 INTERCHANGEABLE
Stator,generator
Ge Aviation Systems Llc Dba Ge Aviation Systems Llc
Cross-Reference Index
Part NumberManufacturer
S-1673 Trw Inc Trw Intl Trade Government Sales Dept (USA)
50707DA Navistar International Corporation Dba Navistar (USA)
V-1374 Mcquay-Norris Inc Oem Div an Skf Industries Co
S-1673 Ertel Engineering Co (USA)
D-1163 Dana Corp Spicer Transmission Div (USA)
50707DA Komatsu American Intl Co (USA)
50707DA Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/ (USA)
1021 Napasco International Inc (USA)
S1673 PRIMARY Eaton Corp Dba Eaton Aerospace Jackson (USA)
50707DA Komatsu America Corp. (USA)
S-1673EX Elgin Industries Inc. Dba (USA)
VE-841 Bosch Automotive Service Solutions Inc. (USA)
VE-841 Spx Corp (USA)
X-1883 Clow Corp (USA)
50707DA International Harvester Co Agricultural Equipment Div (USA)
Related Parts
3110-00-100-6209INTERCHANGEABLE
BALL,BEARING
6115-00-877-3001INTERCHANGEABLE
STATOR,GENERATOR
V1374

Frequently Asked Questions

What is NSN 2805-00-624-3682?

NSN 2805-00-624-3682 is a Valve,poppet,engine, manufactured by Eaton Corp Dba Eaton Aerospace Jackson, classified under FSC 2805 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2805-00-624-3682?

NSN 2805-00-624-3682 has 15 cross-referenced part numbers: S-1673 (Trw Inc Trw Intl Trade Government Sales Dept), 50707DA (Navistar International Corporation Dba Navistar), V-1374 (Mcquay-Norris Inc Oem Div an Skf Industries Co), S-1673 (Ertel Engineering Co), D-1163 (Dana Corp Spicer Transmission Div) and 10 more.

What NSN replaces 2805-00-624-3682?

There are 2 known substitutes for 2805-00-624-3682: 3110-00-100-6209, 6115-00-877-3001. Verify interchangeability with system specifications before substitution.

What are the specifications of S1673?

Key specifications for S1673: Carbon Relief Groove: NOT INCLUDED; Head Style: MUSHROOM; Neck Radius: 0.3750 INCHES NOMINAL IN; First Groove Diameter: 0.2790 INCHES MINIMUM AND 0.2850 INCHES MAXIMUM IN. 20 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2805-00-624-3682 still in active supply?

NSN 2805-00-624-3682 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com