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8504-2 — SWITCH SECTION,ROTARY

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

8504-2: SWITCH SECTION,ROTARY.

The SWITCH SECTION,ROTARY is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, corner_shape: SQUARE ALL CORNERS, overall_width: 3.000 INCHES NOMINAL IN, overall_height: 0.442 INCHES NOMINAL IN, overall_length: 1.764 INCHES NOMINAL IN, style_designator: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-343-1321, 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
8504-2
NSN: 3120-00-343-1321
NIINs: 003431321, 004722589, 008317364, 010675091
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 13446 — PERKINS ENGINES INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
corner_shapeSQUARE ALL CORNERS
overall_width3.000 INCHES NOMINAL IN
overall_height0.442 INCHES NOMINAL IN
overall_length1.764 INCHES NOMINAL IN
style_designatorHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
locking_lug_width0.1980 INCHES MINIMUM AND 0.2180 INCHES MAXIMUM IN
locking_lug_height0.0450 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN
locking_lug_length0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN
body_inside_diameter2.5040 INCHES NOMINAL IN
body_outside_diameter2.6465 INCHES NOMINAL IN
distance_from_lug_end_to_end_of_bearing1.0200 INCHES NOMINAL IN
NSN3120-00-343-1321
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 8504-2 · 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
•
LOCKING LUG HEIGHT: 0.0450 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 2.6465 INCHES NOMINAL IN
•
STYLE DESIGNATOR: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 2.5040 INCHES NOMINAL IN
•
LOCKING LUG WIDTH: 0.1980 INCHES MINIMUM AND 0.2180 INCHES MAXIMUM IN
•
DISTANCE FROM LUG END TO END OF BEARING: 1.0200 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
LOCKING LUG HEIGHT0.0450 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER2.6465 INCHES NOMINAL IN
STYLE DESIGNATORHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH1.2450 INCHES MINIMUM AND 1.2550 INCHES MAXIMUM IN
BODY INSIDE DIAMETER2.5040 INCHES NOMINAL IN
LOCKING LUG WIDTH0.1980 INCHES MINIMUM AND 0.2180 INCHES MAXIMUM IN
DISTANCE FROM LUG END TO END OF BEARING1.0200 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY OVERALL
LOCKING LUG LENGTH0.1750 INCHES MINIMUM AND 0.1800 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
3679199Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 8504-2?
8504-2 is a SWITCH SECTION,ROTARY.
What parts can replace 8504-2?
There is 1 known substitute for 8504-2: 3679199. Substitute compatibility should be verified for your specific system.
What is the NSN for 8504-2?
8504-2 is cataloged in the U.S. Government catalog under NSN 3120-00-343-1321. This indicates validated use in U.S. government and defense supply chains.
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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.