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Technical Data Sheet
135999 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The HOWITZER,MEDIUM,TOWED is a the manufacturer industrial component. Key specifications include material: STEEL CASE, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, case_style: SQUARE, seal_width: 0.562 INCHES NOMINAL IN, load_rating: 5.500 POUNDS NOMINAL LBS, model_number: XM777. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-797-4473, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MRO MRO_GENERAL 135999
NSN: 5360-00-797-4473
FSC: 5360
CAGE: 70210 — HONEYWELL INTERNATIONAL INC. DIV AEROSPACE - TORRANCE (USA)
SPECIFICATIONS
materialSTEEL CASE
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
case_styleSQUARE
seal_width0.562 INCHES NOMINAL IN
load_rating5.500 POUNDS NOMINAL LBS
model_numberXM777
coil_quantity5
inside_diameter0.590 INCHES MINIMUM IN
size_designation155 MILLIMETER MM
style_designatorCYLINDRICAL
spring_free_length0.830 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
NSN5360-00-797-4473
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HOWITZER,MEDIUM,TOWED TITLE COMPONENT PN 135999 MFR HOWITZER,MEDIUM,TOWED
KEY FEATURES
INSIDE DIAMETER: 0.590 INCHES MINIMUM IN
MATERIAL: STEEL OVERALL
COIL QUANTITY: 5
COIL HELIX DIRECTION: RIGHT-HAND OR LEFT-HAND
STYLE DESIGNATOR: CYLINDRICAL
MATERIAL DOCUMENT AND CLASSIFICATION: NISPAN-C,INTERNATIONAL NICKEL CON INC MFR REF SINGLE MATERIAL RESPONSE OVERALL
SPRING FREE OUTSIDE DIAMETER: 0.750 INCHES NOMINAL IN
SPRING FREE LENGTH: 0.830 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER0.590 INCHES MINIMUM IN
MATERIALSTEEL OVERALL
COIL QUANTITY5
COIL HELIX DIRECTIONRIGHT-HAND OR LEFT-HAND
STYLE DESIGNATORCYLINDRICAL
MATERIAL DOCUMENT AND CLASSIFICATIONNISPAN-C,INTERNATIONAL NICKEL CON INC MFR REF SINGLE MATERIAL RESPONSE OVERALL
SPRING FREE OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
SPRING FREE LENGTH0.830 INCHES NOMINAL IN
LOAD RATING5.500 POUNDS NOMINAL LBS
SPRING LENGTH UNDER LOAD0.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
575420M1Interchangeable
interchangeable cross-reference
interchangeable
16680P11Interchangeable
interchangeable cross-reference
interchangeable
18-5E343Interchangeable
interchangeable cross-reference
interchangeable
135999Interchangeable
interchangeable cross-reference
interchangeable
AMP-02-00-00000Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 135999?
135999 is a HOWITZER,MEDIUM,TOWED. It is classified as a MRO (MRO_GENERAL).
What parts can replace 135999?
There are 5 known substitutes for 135999: 575420M1, 16680P11, 18-5E343 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 135999?
135999 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-797-4473. This indicates validated use in U.S. government and defense supply chains.
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