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Technical Data Sheet
PartsTable / COMPONENT / 255351R1
255351R1 ✓ 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

BRACKET,STRUCTURAL COMPONENT,AIR. Key specifications include material: STEEL COMP 4620 OVERALL, corner_shape: SQUARE ALL CORNERS, overall_length: 1.7500 INCHES MINIMUM AND 1.7530 INCHES MAXIMUM IN, surface_finish: 10.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY, keyway_dimension: 0.1260 INCHES MINIMUM AND 0.1290 INCHES MAXIMUM INTERNAL KEYWAY WIDTH IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-425-7158, 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
255351R1
NSN: 3120-00-425-7158
FSC: 3120
CAGE: 92679 — NAVISTAR INTL CORP MELROSE PARK ENGINE PLANT LOCATION /MELROSE PARK/ (USA)
SPECIFICATIONS
materialSTEEL COMP 4620 OVERALL
corner_shapeSQUARE ALL CORNERS
overall_length1.7500 INCHES MINIMUM AND 1.7530 INCHES MAXIMUM IN
surface_finish10.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
keyway_dimension0.1260 INCHES MINIMUM AND 0.1290 INCHES MAXIMUM INTERNAL KEYWAY WIDTH IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter2.2500 INCHES MINIMUM AND 2.2505 INCHES MAXIMUM IN
body_outside_diameter2.6805 INCHES MINIMUM AND 2.6810 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3120-00-425-7158
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 255351R1 · 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
•
MATERIAL: OIL LUBRICATING LUBRICATION
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY INSIDE DIAMETER: 2.2500 INCHES MINIMUM AND 2.2505 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
KEYWAY DIMENSION: 0.1260 INCHES MINIMUM AND 0.1290 INCHES MAXIMUM INTERNAL KEYWAY WIDTH IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALOIL LUBRICATING LUBRICATION
CORNER SHAPESQUARE ALL CORNERS
BODY INSIDE DIAMETER2.2500 INCHES MINIMUM AND 2.2505 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIALSTEEL COMP 4620 OVERALL
KEYWAY DIMENSION0.1260 INCHES MINIMUM AND 0.1290 INCHES MAXIMUM INTERNAL KEYWAY WIDTH IN
KEYWAY DIMENSION0.0750 INCHES MINIMUM AND 0.0800 INCHES MAXIMUM INTERNAL KEYWAY DEPTH IN
KEYWAY DIMENSION1.7500 INCHES MINIMUM AND 1.7530 INCHES MAXIMUM INTERNAL KEYWAY LENGTH IN
BODY OUTSIDE DIAMETER2.6805 INCHES MINIMUM AND 2.6810 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
7109318-001Interchangeable
interchangeable cross-reference
interchangeable
7710-7Interchangeable
interchangeable cross-reference
interchangeable
7710Interchangeable
interchangeable cross-reference
interchangeable
319687-308Interchangeable
interchangeable cross-reference
interchangeable
6410ZInterchangeable
interchangeable cross-reference
interchangeable
41853Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 255351R1?
255351R1 is a BRACKET,STRUCTURAL COMPONENT,AIR.
What parts can replace 255351R1?
There are 20 known substitutes for 255351R1: 7109318-001, 7710-7, 7710 and 17 more. Substitute compatibility should be verified for your specific system.
Is 255351R1 still available?
255351R1 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026