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8H139D-20 — SUPPORT,RETRACTABLE,SEMITRAILER

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

8H139D-20: SUPPORT,RETRACTABLE,SEMITRAILER.

SUPPORT,RETRACTABLE,SEMITRAILER. Key specifications include length: 2.5000 INCHES NOMINAL IN, diameter: 12.000 INCHES NOMINAL IN, extended_height: 39.530 INCHES NOMINAL IN, leg_construction: TUBULAR, special_features: RIGHT FRONT, retracting_method: PIN-HOLE. This part is cataloged in the U.S.

Government catalog under NSN 2590-01-375-5852, 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
8H139D-20
NSN: 2590-01-375-5852
FSC: 2590 — Miscellaneous Vehicular Components
CAGE: 74B05 — AEROBASE GROUP INC (USA)
SPECIFICATIONS
length2.5000 INCHES NOMINAL IN
diameter12.000 INCHES NOMINAL IN
extended_height39.530 INCHES NOMINAL IN
leg_constructionTUBULAR
special_featuresRIGHT FRONT
retracting_methodPIN-HOLE
retracting_mechanismINCLUDED
operational_directionVERTICAL
maximum_underclearance63.030 INCHES IN
operating_control_typeAUTOMATIC
operating_speed_quantity1
frame_width_for_which_designed9.000 INCHES NOMINAL IN
NSN2590-01-375-5852
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SUPPORT,RETRACTABLE,SEMITRAILER TITLE COMPONENT PN 8H139D-20 MFR SUPPORT,RETRACTABLE,SE
KEY FEATURES
•
SHOE: INCLUDED
•
OPERATIONAL DIRECTION: VERTICAL
•
RETRACTING METHOD: PIN-HOLE
•
LENGTH: 2.5000 INCHES NOMINAL IN
•
DIAMETER: 12.000 INCHES NOMINAL IN
•
OPERATING SPEED QUANTITY: 1
•
MAXIMUM UNDERCLEARANCE: 63.030 INCHES IN
•
EXTENDED HEIGHT: 39.530 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SHOEINCLUDED
OPERATIONAL DIRECTIONVERTICAL
RETRACTING METHODPIN-HOLE
LENGTH2.5000 INCHES NOMINAL IN
DIAMETER12.000 INCHES NOMINAL IN
OPERATING SPEED QUANTITY1
MAXIMUM UNDERCLEARANCE63.030 INCHES IN
EXTENDED HEIGHT39.530 INCHES NOMINAL IN
SPECIAL FEATURESRIGHT FRONT
LEG CONSTRUCTIONTUBULAR
SUBSTITUTES & CROSS-REFERENCES 2
90-13-05Reference document
Same NSN cross-reference
Reference document — Secondary reference
300571Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8H139D-20?
8H139D-20 is a SUPPORT,RETRACTABLE,SEMITRAILER.
What parts can replace 8H139D-20?
There are 2 known substitutes for 8H139D-20: 90-13-05, 300571. Substitute compatibility should be verified for your specific system.
What is the NSN for 8H139D-20?
8H139D-20 is cataloged in the U.S. Government catalog under NSN 2590-01-375-5852. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.