PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8109Seal Assembly

Greene Tweed & Co Inc · NSN 1025-00-818-0559 · FSC 1025 · No Item Name Available
Verified by PartsTable
NSN 1025-00-818-0559 — this item is cataloged by the U.S. Government under National Stock Number 1025-00-818-0559. Primary manufacturer part number: 8109.
Features
  • Seal Assembly — FSC 1025
  • 3 verified cross-references
  • Primary manufacturer: Greene Tweed & Co Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Seal Assembly, cataloged under National Stock Number 1025-00-818-0559, is classified within Federal Supply Class 1025 (No Item Name Available) of the Weapons group. The primary manufacturer of record is Greene Tweed & Co Inc. This item has 3 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.

Catalog Facts
Item NameSeal Assembly
FSC / FSG1025 — No Item Name Available (FSG 10)
ManufacturersGreene Tweed & Co Inc (CAGE 5F573); Palmetto Inc (CAGE 72902); U S Army Tank Automotive Command Amsta-Im-Mm (CAGE 19207)
Technical Specifications
ParameterValue
NSN1025-00-818-0559
Primary Part Number8109
Item NameSeal Assembly
FSC / FSG1025 / 10 — No Item Name Available
ManufacturerGreene Tweed & Co Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5999-00-163-6213S2020PHG01 INTERCHANGEABLE
Contact,electrical
Itt Cannon Llc
4820-00-374-7349F86-1 1-4 40 INTERCHANGEABLE
Valve,safety Relief
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
4730-00-814-5370810-9 INTERCHANGEABLE
Elbow,tube
Swagelok Co
4730-00-862-59598109 INTERCHANGEABLE
Adapter,straight,flange to Hose
Safran Electronics & Defense, Avionics Usa, Llc Dba Use CAGE Code 879b2 for Cataloging
5330-01-173-01638109 INTERCHANGEABLE
Gasket
Eaton Corporation Div Fed
3110-01-188-1475810-9 INTERCHANGEABLE
Bearing,ball,annular
Roller Bearing Co of America, Inc Div Pic Design
5985-01-345-3019A3158137 INTERCHANGEABLE
Mast Section
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4130-01-432-0895 INTERCHANGEABLE
Baffle,airflow,electronic Equipm
Cross-Reference Index
Part NumberManufacturer
8109 PRIMARY Greene Tweed & Co Inc (USA)
8109 Palmetto Inc (USA)
8352827 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
Related Parts
5999-00-163-6213INTERCHANGEABLE
CONTACT,ELECTRICAL
S2020PHG01
4820-00-374-7349INTERCHANGEABLE
VALVE,SAFETY RELIEF
F86-1 1-4 40
4730-00-814-5370INTERCHANGEABLE
ELBOW,TUBE
810-9
4730-00-862-5959INTERCHANGEABLE
ADAPTER,STRAIGHT,FLANGE TO HOSE
8109
5330-01-173-0163INTERCHANGEABLE
GASKET
8109
3110-01-188-1475INTERCHANGEABLE
BEARING,BALL,ANNULAR
810-9
5985-01-345-3019INTERCHANGEABLE
MAST SECTION
A3158137
4130-01-432-0895INTERCHANGEABLE
BAFFLE,AIRFLOW,ELECTRONIC EQUIPM

Frequently Asked Questions

What is NSN 1025-00-818-0559?

NSN 1025-00-818-0559 is a Seal Assembly, manufactured by Greene Tweed & Co Inc, classified under FSC 1025 (No Item Name Available). Status: active.

What are the part numbers for NSN 1025-00-818-0559?

NSN 1025-00-818-0559 has 3 cross-referenced part numbers: 8109 (Greene Tweed & Co Inc), 8109 (Palmetto Inc), 8352827 (U S Army Tank Automotive Command Amsta-Im-Mm).

What NSN replaces 1025-00-818-0559?

There are 8 known substitutes for 1025-00-818-0559: 5999-00-163-6213, 4820-00-374-7349, 4730-00-814-5370 and 5 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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