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Technical Data Sheet
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307451 — FLAT DARK EARTH

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

307451: FLAT DARK EARTH.

The FLAT DARK EARTH is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 3120-00-179-7313, 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
307451
NSN: 3120-00-179-7313
NIINs: 001797313, 014754102, 016743280
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 1UVT5 — BRP US INC (USA)
SPECIFICATIONS
end_item_identificationCONTRACTOR LOGISTICS LIFETIME SUPPORT (CRLS), HYDRAULIC EXCAVATOR TYPE 3 (HYEX) (MODEL 330 LCR HX3), NSN 3805-01-463-0805, TM5-3805-281-24P
NSN3120-00-179-7313
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 307451 · 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
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 0.4400 INCHES MINIMUM AND 0.4420 INCHES MAXIMUM IN
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STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 0.3750 INCHES NOMINAL IN
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MATERIAL: PLASTIC POLYAMIDE NYLON OVERALL
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER0.4400 INCHES MINIMUM AND 0.4420 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH0.2850 INCHES MINIMUM AND 0.2950 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.3750 INCHES NOMINAL IN
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 307451?
307451 is a FLAT DARK EARTH.
What is the NSN for 307451?
307451 is cataloged in the U.S. Government catalog under NSN 3120-00-179-7313. 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.