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21506-1 — MANIFOLD ASSEMBLY,HYDRAULIC

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

21506-1: MANIFOLD ASSEMBLY,HYDRAULIC.

The MANIFOLD ASSEMBLY,HYDRAULIC is a the manufacturer industrial component. Key specifications include end_item_identification: 3805-01-537-7952;DITCHING MACHINE RT40, part_name_assigned_by_controlling_agency: PLUG,GLOW. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-354-1701, 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
21506-1
NSN: 3120-00-354-1701
NIINs: 003541701, 012518964, 015508900
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 1ML14 — BRINKLEY TECHNOLOGY GROUP LLC DBA HERCULES MANUFACTURING (USA)
SPECIFICATIONS
end_item_identification3805-01-537-7952;DITCHING MACHINE RT40
part_name_assigned_by_controlling_agencyPLUG,GLOW
NSN3120-00-354-1701
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 21506-1 · 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
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
•
BODY OUTSIDE DIAMETER: 2.3770 INCHES MINIMUM AND 2.3780 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SPLIT, PLAIN, NO OUTSIDE FLANGES
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-13506,COMP 190 MIL SPEC SINGLE MATERIAL RESPONSE INNER LAYER
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE INSIDE LEFT CORNER
CORNER SHAPECHAMFERED OUTSIDE LEFT CORNER
BODY OUTSIDE DIAMETER2.3770 INCHES MINIMUM AND 2.3780 INCHES MAXIMUM IN
STYLE DESIGNATORSPLIT, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-13506,COMP 190 MIL SPEC SINGLE MATERIAL RESPONSE INNER LAYER
OVERALL LENGTH1.2500 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.1230 INCHES MINIMUM AND 2.1235 INCHES MAXIMUM IN
ANTIROTATION/LUBRICATION TYPE AND QUANTITY1 HOLE
SUBSTITUTES & CROSS-REFERENCES 2
17024BReference document
Same NSN cross-reference
Reference document — Secondary reference
215045BReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21506-1?
21506-1 is a MANIFOLD ASSEMBLY,HYDRAULIC.
What parts can replace 21506-1?
There are 2 known substitutes for 21506-1: 17024B, 215045B. Substitute compatibility should be verified for your specific system.
What is the NSN for 21506-1?
21506-1 is cataloged in the U.S. Government catalog under NSN 3120-00-354-1701. 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.