PartsTable
Technical Data Sheet
Download PDF

503003 — PUMP UNIT,CENTRIFUGAL

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

503003: PUMP UNIT,CENTRIFUGAL.

The PUMP UNIT,CENTRIFUGAL is a the manufacturer industrial component. Key specifications include diameter: 0.375 INCHES NOMINAL IN, style_designator: STRAIGHT, under_head_length: 2.500 INCHES NOMINAL IN, pin_attachment_type: CABLE LANYARD W/TERMINATIONS, hole_arrangement_style: DRILLED THRU HEAD. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-121-6917, 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
503003
NSN: 3120-00-121-6917
NIINs: 001216917, 010148166, 013261275
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 5P630 — EVERLLENCE USA INC. (USA)
SPECIFICATIONS
diameter0.375 INCHES NOMINAL IN
style_designatorSTRAIGHT
under_head_length2.500 INCHES NOMINAL IN
pin_attachment_typeCABLE LANYARD W/TERMINATIONS
hole_arrangement_styleDRILLED THRU HEAD
NSN3120-00-121-6917
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 503003 · 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
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
Ready to buy 503003?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 503003?
503003 is a PUMP UNIT,CENTRIFUGAL.
What is the NSN for 503003?
503003 is cataloged in the U.S. Government catalog under NSN 3120-00-121-6917. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 503003

✓ 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.