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51251 ✓ Verified by PartsTable
Legrand · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The FILTER ELEMENT,FLUID is a Legrand industrial component. Key specifications include general_characteristics_item_description: FENESTRATED; ELLIPSOID W/NEEDLE; USED W/ENDOSCOPE; APPROX 100 CM LG CM, part_name_assigned_by_controlling_agency: FORCEPS BIOPSY ABDOMEN 100CM LG FENESTRATED ELLIPSOID W/NEEDLE CM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-298-0388, 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
51251
NSN: 5330-00-298-0388
FSC: 5330
CAGE: 80201 — SKF USA INC. DBA SKF AEROSPACE SEALING SOLUTIONS (USA)
SPECIFICATIONS
general_characteristics_item_descriptionFENESTRATED; ELLIPSOID W/NEEDLE; USED W/ENDOSCOPE; APPROX 100 CM LG CM
part_name_assigned_by_controlling_agencyFORCEPS BIOPSY ABDOMEN 100CM LG FENESTRATED ELLIPSOID W/NEEDLE CM
NSN5330-00-298-0388
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 51251 MFR: Legrand ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HOUSING BORE DIAMETER: 6.383 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
•
OUTSIDE DIAMETER: 6.381 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
MATERIAL: STEEL CASE
•
ACCOMMODATED SHAFT DIAMETER: 5.125 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
SEAL WIDTH: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOUSING BORE DIAMETER6.383 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
OUTSIDE DIAMETER6.381 INCHES NOMINAL IN
CASE STYLESQUARE
MATERIALSTEEL CASE
ACCOMMODATED SHAFT DIAMETER5.125 INCHES NOMINAL IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
SEAL WIDTH0.625 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
416821-66DInterchangeable
interchangeable cross-reference
interchangeable
903203Interchangeable
interchangeable cross-reference
interchangeable
AS1937-6Interchangeable
interchangeable cross-reference
interchangeable
51248Interchangeable
interchangeable cross-reference
interchangeable
00044Interchangeable
interchangeable cross-reference
interchangeable
55071Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51251?
51251 is a FILTER ELEMENT,FLUID manufactured by Legrand.
What parts can replace 51251?
There are 13 known substitutes for 51251: 416821-66D, 903203, AS1937-6 and 10 more. Substitute compatibility should be verified for your specific system.
Is 51251 still available?
51251 is currently cancelled.
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Last verified: July 2026