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Technical Data Sheet
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258100 — BEARING HALF SET,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

258100: BEARING HALF SET,SLEEVE.

The BEARING HALF SET,SLEEVE is a the manufacturer industrial component. Key specifications include end_item_identification: KNUCKLE BOOM P/N K280-70 ONBOARD 400 FT WAGB COAST GUARD CUTTER POLAR STAR FT, part_name_assigned_by_controlling_agency: SEAL - HYDRAULIC SWIVEL. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-938-5821, 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
258100
NSN: 3120-00-938-5821
NIINs: 009385821, 012574951, 016076659
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
end_item_identificationKNUCKLE BOOM P/N K280-70 ONBOARD 400 FT WAGB COAST GUARD CUTTER POLAR STAR FT
part_name_assigned_by_controlling_agencySEAL - HYDRAULIC SWIVEL
NSN3120-00-938-5821
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 258100 · 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
•
COMPONENT QUANTITY: 10
•
DOCUMENT IDENTIFICATION: 58100AS
•
DOCUMENT SOURCE: 28265
TECHNICAL CHARACTERISTICS
COMPONENT QUANTITY10
DOCUMENT IDENTIFICATION58100AS
DOCUMENT SOURCE28265
SUBSTITUTES & CROSS-REFERENCES 3
40-3104051Reference document
Same NSN cross-reference
Reference document — Secondary reference
258100ASReference document
Same NSN cross-reference
Reference document — Secondary reference
258100STDReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 258100?
258100 is a BEARING HALF SET,SLEEVE.
What parts can replace 258100?
There are 3 known substitutes for 258100: 40-3104051, 258100AS, 258100STD. Substitute compatibility should be verified for your specific system.
What is the NSN for 258100?
258100 is cataloged in the U.S. Government catalog under NSN 3120-00-938-5821. 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.