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FD52 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

The DISK BRAKE SHOE is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, wall_thickness: 0.178 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN, working_length: 14.500 INCHES NOMINAL IN, inside_diameter: 2.000 INCHES NOMINAL IN, first_arm_length: 2.000 INCHES NOMINAL IN, special_features: FRONT BRAKE PAD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-446-0665, 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
FD52
NSN: 4720-00-446-0665
FSC: 4720
CAGE: 61822 — AMCA INTL CORP UNIT CRANE DIV (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
wall_thickness0.178 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
working_length14.500 INCHES NOMINAL IN
inside_diameter2.000 INCHES NOMINAL IN
first_arm_length2.000 INCHES NOMINAL IN
special_featuresFRONT BRAKE PAD
style_designatorSTRAIGHT CORRUGATED
second_arm_length2.000 INCHES NOMINAL IN
end_item_identificationTRACTOR,WHEELED AIRCRAFT TOWING
material_document_and_classificationSAE 20R5,CLASS R,GRADE 1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4720-00-446-0665
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: FD52 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FIRST ARM LENGTH: 2.000 INCHES NOMINAL IN
•
SECOND ARM LENGTH: 2.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT CORRUGATED
•
WORKING LENGTH: 14.500 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 20R5,CLASS R,GRADE 1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
INSIDE DIAMETER: 2.000 INCHES NOMINAL IN
•
WALL THICKNESS: 0.178 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
FIRST ARM LENGTH2.000 INCHES NOMINAL IN
SECOND ARM LENGTH2.000 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT CORRUGATED
WORKING LENGTH14.500 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 20R5,CLASS R,GRADE 1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
INSIDE DIAMETER2.000 INCHES NOMINAL IN
WALL THICKNESS0.178 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
TW4002540700Interchangeable
interchangeable cross-reference
interchangeable
512938-3Interchangeable
interchangeable cross-reference
interchangeable
129662Interchangeable
interchangeable cross-reference
interchangeable
PL900-23996-2Interchangeable
interchangeable cross-reference
interchangeable
2989887Interchangeable
interchangeable cross-reference
interchangeable
2AC42Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FD52?
FD52 is a DISK BRAKE SHOE.
What parts can replace FD52?
There are 22 known substitutes for FD52: TW4002540700, 512938-3, 129662 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FD52?
FD52 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-446-0665. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026