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AR3SS4-12 — BEARING,PLAIN,ROD END

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

AR3SS4-12: BEARING,PLAIN,ROD END.

The BEARING,PLAIN,ROD END is a the manufacturer industrial component. Key specifications include material: STEEL COMP E52100 OR STEEL COMP 440C INNER MEMBER, shank_style: INTERNALLY THREADED W/BEAD AND WRENCH FLATS AND INSPECTION HOLE, thread_class: 3B, bore_diameter: 0.1895 INCHES MINIMUM AND 0.1915 INCHES MAXIMUM IN, overall_length: 1.7505 INCHES MINIMUM AND 1.7805 INCHES MAXIMUM IN, hardness_rating: 28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM RACE INSERT. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-028-9519, 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
AR3SS4-12
NSN: 3120-01-028-9519
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 50294 — NEW HAMPSHIRE BALL BEARINGS INC DIV PRECISION DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP E52100 OR STEEL COMP 440C INNER MEMBER
shank_styleINTERNALLY THREADED W/BEAD AND WRENCH FLATS AND INSPECTION HOLE
thread_class3B
bore_diameter0.1895 INCHES MINIMUM AND 0.1915 INCHES MAXIMUM IN
overall_length1.7505 INCHES MINIMUM AND 1.7805 INCHES MAXIMUM IN
hardness_rating28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM RACE INSERT
thread_diameter0.250 INCHES NOMINAL IN
special_featuresCHROMIUM PLATING ON E52100 STEEL INNER MEMBER ONLY
style_designatorBALL TYPE
thread_directionRIGHT-HAND
surface_treatmentCADMIUM ROD END BODY
inner_member_width0.4370 INCHES NOMINAL IN
NSN3120-01-028-9519
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: AR3SS4-12 · 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
•
SHANK THREAD LENGTH: 0.7190 INCHES MINIMUM AND 0.8120 INCHES MAXIMUM IN
•
BORE CENTER TO SHANK END DISTANCE: 1.3650 INCHES MINIMUM AND 1.3850 INCHES MAXIMUM IN
•
INNER MEMBER WIDTH: 0.4370 INCHES NOMINAL IN
•
HARDNESS RATING: 57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER
•
OUTER MEMBER WIDTH: 0.3320 INCHES MINIMUM AND 0.3470 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: BALL TYPE
TECHNICAL CHARACTERISTICS
SHANK THREAD LENGTH0.7190 INCHES MINIMUM AND 0.8120 INCHES MAXIMUM IN
BORE CENTER TO SHANK END DISTANCE1.3650 INCHES MINIMUM AND 1.3850 INCHES MAXIMUM IN
INNER MEMBER WIDTH0.4370 INCHES NOMINAL IN
HARDNESS RATING57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER
HARDNESS RATING26.0 ROCKWELL C MINIMUM ROD END BODY
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM RACE INSERT
OUTER MEMBER WIDTH0.3320 INCHES MINIMUM AND 0.3470 INCHES MAXIMUM IN
STYLE DESIGNATORBALL TYPE
THREAD DIAMETER0.250 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONBMS 3-8, MCDONNELL DOUGLAS CORP, MCDONNELL AIRCRAFT DIVISION MFR REF SINGLE MATERIAL RESPONSE LUBRICATION
OTHER ITEMS IN FSC 3120 — Bearings, Plain, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3120-00-001-1288 3120-00-001-1835 3120-00-001-1838 3120-00-001-1928 3120-00-001-1934 3120-00-001-3933 3120-00-001-3937 3120-00-001-3938
SUBSTITUTES & CROSS-REFERENCES 7
BACB10A399M2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ARB 3-54-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
HB-3-145Reference document
Same NSN cross-reference
Reference document — Secondary reference
FXJ34-14B-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
KB-3SS-1D6Reference document
Same NSN cross-reference
Reference document — Secondary reference
51132DDReference document
Same NSN cross-reference
Reference document — Secondary reference
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 AR3SS4-12?
AR3SS4-12 is a BEARING,PLAIN,ROD END.
What parts can replace AR3SS4-12?
There are 7 known substitutes for AR3SS4-12: BACB10A399M2, ARB 3-54-12, HB-3-145 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AR3SS4-12?
AR3SS4-12 is cataloged in the U.S. Government catalog under NSN 3120-01-028-9519. 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.