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1921660 — CYLINDER ASSEMBLY,HYDRAULIC BRAK

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

1921660: CYLINDER ASSEMBLY,HYDRAULIC BRAK.

CYLINDER ASSEMBLY,HYDRAULIC BRAK. Key specifications include material: STEEL BODY, port_style: PLAIN LOCATION NOT OTHERWISE SPECIFIED, overall_width: 4.260 INCHES NOMINAL IN, overall_height: 5.435 INCHES NOMINAL IN, reservoir_type: INTEGRAL, actuation_method: DIRECT. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-540-9864, 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
1921660
NSN: 3120-00-540-9864
NIINs: 005409864, 007102036, 013587127
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 1LW55 — BORGWARNER PDS (ANDERSON), L.L.C. (USA)
SPECIFICATIONS
materialSTEEL BODY
port_stylePLAIN LOCATION NOT OTHERWISE SPECIFIED
overall_width4.260 INCHES NOMINAL IN
overall_height5.435 INCHES NOMINAL IN
reservoir_typeINTEGRAL
actuation_methodDIRECT
compressed_length7.000 INCHES NOMINAL IN
features_providedRUBBER BOOT
port_thread_class2B LOCATION NOT OTHERWISE SPECIFIED
mounting_provisionUNTHREADED MOUNTING HOLES
port_thread_diameter0.500 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
body_outside_diameter2.000 INCHES NOMINAL IN
NSN3120-00-540-9864
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 1921660 · 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 ALL CORNERS
•
BODY OUTSIDE DIAMETER: 1.2550 INCHES MINIMUM AND 1.2570 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 1.1010 INCHES MINIMUM AND 1.1040 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER1.2550 INCHES MINIMUM AND 1.2570 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH1.2400 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN
BODY INSIDE DIAMETER1.1010 INCHES MINIMUM AND 1.1040 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1921660?
1921660 is a CYLINDER ASSEMBLY,HYDRAULIC BRAK.
What is the NSN for 1921660?
1921660 is cataloged in the U.S. Government catalog under NSN 3120-00-540-9864. 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.