PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILL25567Leak Test Compound

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6850-00-990-1581 · FSC 6850 · No Item Name Available
Verified by PartsTable
NSN 6850-00-990-1581 — this item is cataloged by the U.S. Government under National Stock Number 6850-00-990-1581. Primary manufacturer part number: MILL25567.
Features
  • Leak Test Compound — FSC 6850
  • Departure From Cited Designator: AGUC,AGXZ
  • Physical Form: LIQUID
  • Nondefinitive Spec/std Data: 2 TYPE
  • Quantity Within Each Unit Package: 1.0 GALLONS
  • 1 verified cross-reference
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Leak Test Compound, cataloged under National Stock Number 6850-00-990-1581, is classified within Federal Supply Class 6850 (No Item Name Available) of the Chemicals and Chemical Products group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6850-00-990-1581
Primary Part NumberMILL25567
Item NameLeak Test Compound
FSC / FSG6850 / 68 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Departure From Cited DesignatorAGUC,AGXZ
Physical FormLIQUID
Nondefinitive Spec/std Data2 TYPE
Quantity Within Each Unit Package1.0 GALLONS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6850-00-051-5052 INTERCHANGEABLE
Leak Test Compound
6850-00-185-0423 INTERCHANGEABLE
Leak Test Compound
6850-00-186-2963 INTERCHANGEABLE
Leak Test Compound
6850-00-621-1819 INTERCHANGEABLE
Leak Test Compound
6850-00-621-1820 INTERCHANGEABLE
Leak Test Compound
6850-01-309-6441 INTERCHANGEABLE
Leak Test Compound
6850-01-464-4751 INTERCHANGEABLE
Leak Test Compound
Cross-Reference Index
Part NumberManufacturer
MILL25567 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6850-00-051-5052INTERCHANGEABLE
LEAK TEST COMPOUND
6850-00-185-0423INTERCHANGEABLE
LEAK TEST COMPOUND
6850-00-186-2963INTERCHANGEABLE
LEAK TEST COMPOUND
6850-00-621-1819INTERCHANGEABLE
LEAK TEST COMPOUND
6850-00-621-1820INTERCHANGEABLE
LEAK TEST COMPOUND
6850-01-309-6441INTERCHANGEABLE
LEAK TEST COMPOUND
6850-01-464-4751INTERCHANGEABLE
LEAK TEST COMPOUND

Frequently Asked Questions

What is NSN 6850-00-990-1581?

NSN 6850-00-990-1581 is a Leak Test Compound, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6850 (No Item Name Available). Status: active.

What are the part numbers for NSN 6850-00-990-1581?

NSN 6850-00-990-1581 has 1 cross-referenced part number: MILL25567 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6850-00-990-1581?

There are 7 known substitutes for 6850-00-990-1581: 6850-00-051-5052, 6850-00-185-0423, 6850-00-186-2963 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILL25567?

Key specifications for MILL25567: Departure From Cited Designator: AGUC,AGXZ; Physical Form: LIQUID; Nondefinitive Spec/std Data: 2 TYPE; Quantity Within Each Unit Package: 1.0 GALLONS. 4 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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