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1851940 — HOLDER ASSEMBLY,ELECTRICAL CONTA

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

1851940: HOLDER ASSEMBLY,ELECTRICAL CONTA.

HOLDER ASSEMBLY,ELECTRICAL CONTA. Key specifications include diameter: 0.5600 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN, material: COPPER ALLOY OVERALL, corner_shape: SQUARE ALL CORNERS, outside_diameter: 1.2450 INCHES MINIMUM AND 1.2550 INCHES MAXIMUM IN, style_designator: ROUND, overall_thickness: 0.0600 INCHES MINIMUM AND 0.0640 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-893-5342, 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
1851940
NSN: 3120-00-893-5342
NIINs: 008935342, 011946570
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
diameter0.5600 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN
materialCOPPER ALLOY OVERALL
corner_shapeSQUARE ALL CORNERS
outside_diameter1.2450 INCHES MINIMUM AND 1.2550 INCHES MAXIMUM IN
style_designatorROUND
overall_thickness0.0600 INCHES MINIMUM AND 0.0640 INCHES MAXIMUM IN
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN3120-00-893-5342
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 1851940 · 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
•
OVERALL THICKNESS: 0.0600 INCHES MINIMUM AND 0.0640 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: ROUND
•
DIAMETER: 0.5600 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 1.2450 INCHES MINIMUM AND 1.2550 INCHES MAXIMUM IN
•
MATERIAL: LUBRICANT LUBRICATION
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
OVERALL THICKNESS0.0600 INCHES MINIMUM AND 0.0640 INCHES MAXIMUM IN
STYLE DESIGNATORROUND
DIAMETER0.5600 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER1.2450 INCHES MINIMUM AND 1.2550 INCHES MAXIMUM IN
MATERIALLUBRICANT LUBRICATION
MATERIALCOPPER ALLOY OVERALL
CENTER HOLE SHAPE STYLEROUND
SUBSTITUTES & CROSS-REFERENCES 1
TT1200-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1851940?
1851940 is a HOLDER ASSEMBLY,ELECTRICAL CONTA.
What parts can replace 1851940?
There is 1 known substitute for 1851940: TT1200-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 1851940?
1851940 is cataloged in the U.S. Government catalog under NSN 3120-00-893-5342. 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.