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Technical Data Sheet
PartsTable / COMPONENT / 121556
121556 ✓ 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

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316, special_features: FOR SAFETY RELIEF VALVE SZ 0.500 IN. BY 1.000 IN.

IN, end_item_identification: SUPPLY CLASS AOE, valve_design_control_activity: 15187, valve_size_for_which_designed: 0.500 INCHES 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 3120-00-593-2812, 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
121556
NSN: 3120-00-593-2812
FSC: 3120
CAGE: 0AX87 — JPI TRANSPORTATION PRODUCTS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 316
special_featuresFOR SAFETY RELIEF VALVE SZ 0.500 IN. BY 1.000 IN. IN
end_item_identificationSUPPLY CLASS AOE
valve_design_control_activity15187
valve_size_for_which_designed0.500 INCHES IN
NSN3120-00-593-2812
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 121556 · 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
•
BODY OUTSIDE DIAMETER: 1.6380 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 1.5000 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.1760 INCHES NOMINAL FIRST IN
•
ANTIROTATION/LUBRICATION TYPE AND QUANTITY: 1 HOLE
TECHNICAL CHARACTERISTICS (FLIS)
BODY OUTSIDE DIAMETER1.6380 INCHES NOMINAL IN
BODY INSIDE DIAMETER1.5000 INCHES NOMINAL IN
OVERALL LENGTH1.3170 INCHES NOMINAL IN
HOLE DIAMETER0.1760 INCHES NOMINAL FIRST IN
ANTIROTATION/LUBRICATION TYPE AND QUANTITY1 HOLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
121556Interchangeable
interchangeable cross-reference
interchangeable
DS-G-74893Interchangeable
interchangeable cross-reference
interchangeable
DS-G-74893 ITEM 4Interchangeable
interchangeable cross-reference
interchangeable
70262R1Interchangeable
Same NIIN cross-reference
interchangeable
SH224Interchangeable
Same NIIN cross-reference
interchangeable
1579DRInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121556?
121556 is a BUSHING,SLEEVE.
What parts can replace 121556?
There are 6 known substitutes for 121556: 121556, DS-G-74893, DS-G-74893 ITEM 4 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 121556?
121556 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-593-2812. 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