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PartsTable / COMPONENT / M297A
M297A ✓ Verified by PartsTable
— · 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 SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: SQUARE, seal_width: 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT DEGF, housing_bore_diameter: 2.718 INCHES NOMINAL IN, sealing_element_style: VERTICAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-521-6104, 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
M297A
NSN: 5330-00-521-6104
FSC: 5330
CAGE: 12935 — MARS INDUSTRIES INC (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT DEGF
housing_bore_diameter2.718 INCHES NOMINAL IN
sealing_element_styleVERTICAL
accommodated_shaft_diameter1.750 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5330-00-521-6104
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M297A MFR: OEM ⚠ 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
•
CASE STYLE: SQUARE
•
SEAL WIDTH: 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
TEMP RATING: 250.0 FAHRENHEIT DEGF
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
MATERIAL: WOOL SEALING ELEMENT
•
SEALING ELEMENT STYLE: VERTICAL
•
HOUSING BORE DIAMETER: 2.718 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CASE STYLESQUARE
SEAL WIDTH0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
TEMP RATING250.0 FAHRENHEIT DEGF
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
MATERIALWOOL SEALING ELEMENT
SEALING ELEMENT STYLEVERTICAL
HOUSING BORE DIAMETER2.718 INCHES NOMINAL IN
MATERIALSTEEL CASE
ACCOMMODATED SHAFT DIAMETER1.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
4902Interchangeable
interchangeable cross-reference
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622627Interchangeable
interchangeable cross-reference
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253212Interchangeable
interchangeable cross-reference
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2198911Interchangeable
interchangeable cross-reference
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M4000-241Interchangeable
interchangeable cross-reference
interchangeable
1-20ACLASS2DESIGNAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M297A?
M297A is a SEAL,PLAIN ENCASED.
What parts can replace M297A?
There are 12 known substitutes for M297A: 4902, 622627, 253212 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M297A?
M297A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-521-6104. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026