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4M342-18 — BEARING,PLAIN,SELF-ALIGNING

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

4M342-18: BEARING,PLAIN,SELF-ALIGNING.

The BEARING,PLAIN,SELF-ALIGNING is a the manufacturer industrial component. Key specifications include material: OIL LUBRICATING LUBRICATION, bore_diameter: 1.1250 INCHES MINIMUM AND 1.1255 INCHES MAXIMUM IN, hardness_rating: 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM INNER MEMBER, style_designator: WITHOUT INSERT OR LINER WITH STAKING GROOVE, inner_member_width: 0.9950 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN, outer_member_width: 0.8950 INCHES MINIMUM AND 0.9050 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-293-7976, 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
4M342-18
NSN: 3120-01-293-7976
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 02758 — U S BEARINGS (USA)
SPECIFICATIONS
materialOIL LUBRICATING LUBRICATION
bore_diameter1.1250 INCHES MINIMUM AND 1.1255 INCHES MAXIMUM IN
hardness_rating43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM INNER MEMBER
style_designatorWITHOUT INSERT OR LINER WITH STAKING GROOVE
inner_member_width0.9950 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
outer_member_width0.8950 INCHES MINIMUM AND 0.9050 INCHES MAXIMUM IN
lubrication_featureGROOVE AND PERFORATION INNER MEMBER
static_radial_load_rating121500 POUNDS LBS
outer_member_outside_diameter2.0000 INCHES MINIMUM AND 2.0005 INCHES MAXIMUM IN
material_document_and_classificationQQ-C-530 FED SPEC ALL MATERIAL RESPONSES INNER MEMBER
NSN3120-01-293-7976
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 4M342-18 · 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
•
INNER MEMBER WIDTH: 0.9950 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
•
OUTER MEMBER WIDTH: 0.8950 INCHES MINIMUM AND 0.9050 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: WITHOUT INSERT OR LINER WITH STAKING GROOVE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OUTER RACE MEMBER
•
LUBRICATION FEATURE: GROOVE AND PERFORATION INNER MEMBER
TECHNICAL CHARACTERISTICS
INNER MEMBER WIDTH0.9950 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM INNER MEMBER
OUTER MEMBER WIDTH0.8950 INCHES MINIMUM AND 0.9050 INCHES MAXIMUM IN
STYLE DESIGNATORWITHOUT INSERT OR LINER WITH STAKING GROOVE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OUTER RACE MEMBER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-530 FED SPEC ALL MATERIAL RESPONSES INNER MEMBER
LUBRICATION FEATUREGROOVE AND PERFORATION INNER MEMBER
STATIC RADIAL LOAD RATING121500 POUNDS LBS
BORE DIAMETER1.1250 INCHES MINIMUM AND 1.1255 INCHES MAXIMUM IN
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 4
HSB18-101Reference document
Same NSN cross-reference
Reference document — Secondary reference
BNG18H-342Reference document
Same NSN cross-reference
Reference document — Secondary reference
AGB18V4003Reference document
Same NSN cross-reference
Reference document — Secondary reference
03-582-18E-001Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4M342-18?
4M342-18 is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace 4M342-18?
There are 4 known substitutes for 4M342-18: HSB18-101, BNG18H-342, AGB18V4003 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4M342-18?
4M342-18 is cataloged in the U.S. Government catalog under NSN 3120-01-293-7976. 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.