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Technical Data Sheet
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56527 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

VALVE,REGULATING,FLUID PRESSURE. Key specifications include diameter: 0.5130 INCHES MINIMUM AND 0.5230 INCHES MAXIMUM IN, material: STEEL OVERALL, bulb_length: 4.660 INCHES MINIMUM AND 6.660 INCHES MAXIMUM IN, corner_shape: SQUARE ALL CORNERS, thread_class: 2B ALL THREADED HOLE, bulb_diameter: 0.250 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-081-9336, 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
56527
NSN: 3120-00-081-9336
FSC: 3120
CAGE: 59211 — PARKER-HANNIFIN CORPORATION DBA SERVICE AND SUPPORT OPERATION DIV SERVICES AND SUPPORT OPERATIONS (USA)
SPECIFICATIONS
diameter0.5130 INCHES MINIMUM AND 0.5230 INCHES MAXIMUM IN
materialSTEEL OVERALL
bulb_length4.660 INCHES MINIMUM AND 6.660 INCHES MAXIMUM IN
corner_shapeSQUARE ALL CORNERS
thread_class2B ALL THREADED HOLE
bulb_diameter0.250 INCHES NOMINAL IN
overall_width1.830 INCHES NOMINAL IN
terminal_typeTAB W/SCREW
overall_height2.362 INCHES NOMINAL IN
overall_length2.960 INCHES NOMINAL IN
surface_finish16.0 MICROINCHES RIGHT SIDE
hardness_rating58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL
NSN3120-00-081-9336
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 56527 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
DIAMETER: 0.5130 INCHES MINIMUM AND 0.5230 INCHES MAXIMUM IN
•
SURFACE FINISH: 16.0 MICROINCHES RIGHT SIDE
•
CORNER SHAPE: SQUARE ALL CORNERS
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
DIAMETER0.5130 INCHES MINIMUM AND 0.5230 INCHES MAXIMUM IN
SURFACE FINISH16.0 MICROINCHES RIGHT SIDE
CORNER SHAPESQUARE ALL CORNERS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE FINISH16.0 MICROINCHES LEFT SIDE
SURFACE FINISH125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH125.0 MICROINCHES LARGEST OUTSIDE DIAMETER
CENTER HOLE SHAPE STYLEROUND
TEST DATA DOCUMENT81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
HARDNESS RATING58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
78-8454-3419-6Interchangeable
interchangeable cross-reference
interchangeable
2796659-1Interchangeable
interchangeable cross-reference
interchangeable
PL335Interchangeable
interchangeable cross-reference
interchangeable
56527Interchangeable
interchangeable cross-reference
interchangeable
AP500-4Interchangeable
interchangeable cross-reference
interchangeable
5930PL1324965Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56527?
56527 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace 56527?
There are 6 known substitutes for 56527: 78-8454-3419-6, 2796659-1, PL335 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 56527?
56527 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-081-9336. 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