PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

400DGun,sealing Compound,hydraulic

Btr Valve Sealants Inc · NSN 4940-00-249-5058 · FSC 4940 · No Item Name Available
Verified by PartsTable
NSN 4940-00-249-5058 — this item is cataloged by the U.S. Government under National Stock Number 4940-00-249-5058. Primary manufacturer part number: 400D.
Features
  • Gun,sealing Compound,hydraulic — FSC 4940
  • General Characteristics Item Description: INCREASED FLUID CAP. PROVIDES FOR LONGER PERIODS OF OPERATION BEFORE RECHARGING IS NECESSARY; TAMPER PROOF RELIEF VALVE OPERATES EFFICIENTLY AT ANY TEMPERATURE; LEATHER PISTON CUPS; HANDLES ALL TYPES OF VALVE SEALANT REGARDLESS OF VISCOSITY
  • 1 verified cross-reference
  • Primary manufacturer: Btr Valve Sealants Inc
Applications
  • Maintenance depot operations
  • Field repair and servicing
  • Vehicle maintenance facilities
General Description

The Gun,sealing Compound,hydraulic, cataloged under National Stock Number 4940-00-249-5058, is classified within Federal Supply Class 4940 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Btr Valve Sealants Inc. Government technical data includes 1 verified specification, 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4940-00-249-5058
Primary Part Number400D
Item NameGun,sealing Compound,hydraulic
FSC / FSG4940 / 49 — No Item Name Available
ManufacturerBtr Valve Sealants Inc
StatusACTIVE
General Characteristics Item DescriptionINCREASED FLUID CAP. PROVIDES FOR LONGER PERIODS OF OPERATION BEFORE RECHARGING IS NECESSARY; TAMPER PROOF RELIEF VALVE OPERATES EFFICIENTLY AT ANY TEMPERATURE; LEATHER PISTON CUPS; HANDLES ALL TYPES OF VALVE SEALANT REGARDLESS OF VISCOSITY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5961-00-152-79931N4588 INTERCHANGEABLE
Semiconductor Device,diode
Powerex, Inc.
5961-00-497-09451N3289A INTERCHANGEABLE
Semiconductor Device,diode
Infineon Technologies Americas Corp
6625-00-643-1670ME-30A/U INTERCHANGEABLE
Voltmeter
Joint Electronics Type Designation System
6685-01-280-3702TS0400 INTERCHANGEABLE
Temperature Sticks,phase Change
Tempil, Inc. Dba Tempil, Inc.
4510-01-398-8495400-LF-WF INTERCHANGEABLE
Faucet,single
Delta Faucet Co
Cross-Reference Index
Part NumberManufacturer
400D PRIMARY Btr Valve Sealants Inc (USA)
Related Parts
5961-00-152-7993INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
1N4588
5961-00-497-0945INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
1N3289A
6625-00-643-1670INTERCHANGEABLE
VOLTMETER
ME-30A/U
6685-01-280-3702INTERCHANGEABLE
TEMPERATURE STICKS,PHASE CHANGE
TS0400
4510-01-398-8495INTERCHANGEABLE
FAUCET,SINGLE
400-LF-WF

Frequently Asked Questions

What is NSN 4940-00-249-5058?

NSN 4940-00-249-5058 is a Gun,sealing Compound,hydraulic, manufactured by Btr Valve Sealants Inc, classified under FSC 4940 (No Item Name Available). Status: active.

What are the part numbers for NSN 4940-00-249-5058?

NSN 4940-00-249-5058 has 1 cross-referenced part number: 400D (Btr Valve Sealants Inc).

What NSN replaces 4940-00-249-5058?

There are 5 known substitutes for 4940-00-249-5058: 5961-00-152-7993, 5961-00-497-0945, 6625-00-643-1670 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 400D?

Key specifications for 400D: General Characteristics Item Description: INCREASED FLUID CAP. PROVIDES FOR LONGER PERIODS OF OPERATION BEFORE RECHARGING IS NECESSARY; TAMPER PROOF RELIEF VALVE OPERATES EFFICIENTLY AT ANY TEMPERATURE; LEATHER PISTON CUPS; HANDLES ALL TYPES OF VALVE SEALANT REGARDLESS OF VISCOSITY; Part Name Assigned by Controlling Agency: GUN, SEALING COMPOUND, HYDRAULIC. 2 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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