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Technical Data Sheet
PartsTable / O-RING / MIL-R-15624,CLASS 3
MIL-R-15624,CLASS 3 ✓ 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 MIL-R-15624,CLASS 3 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-273-1000, 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
MIL-R-15624,CLASS 3
NSN: 5331-01-273-1000
FSC: 5331 — O-RING
CAGE: 17238 — PALL CORPORATION (USA)
SPECIFICATIONS
Part NumberMIL-R-15624,CLASS 3
NSN5331-01-273-1000
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-R-15624,CLASS 3 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
•
PERIPHERAL DIAMETER: 4.387 INCHES NOMINAL IN
•
ELONGATION PERCENTAGE: 160 MAXIMUM
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
CENTER HOLE DIAMETER: 4.094 INCHES MINIMUM AND 4.124 INCHES MAXIMUM IN
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER4.387 INCHES NOMINAL IN
ELONGATION PERCENTAGE160 MAXIMUM
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
CENTER HOLE DIAMETER4.094 INCHES MINIMUM AND 4.124 INCHES MAXIMUM IN
CRITICALITY CODE JUSTIFICATIONZZZY
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
MILR15624-1-4IDX1-20DX1-8CL3Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-15624 CLA SS 3Interchangeable
interchangeable cross-reference
interchangeable
4047-1220PC72Interchangeable
interchangeable cross-reference
interchangeable
MS28775-243ESInterchangeable
interchangeable cross-reference
interchangeable
2-243-N304-7Interchangeable
interchangeable cross-reference
interchangeable
AN6230B21Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-R-15624,CLASS 3?
MIL-R-15624,CLASS 3 is a MIL-R-15624,CLASS 3.
What parts can replace MIL-R-15624,CLASS 3?
There are 14 known substitutes for MIL-R-15624,CLASS 3: MILR15624-1-4IDX1-20DX1-8CL3, MIL-R-15624 CLA SS 3, 4047-1220PC72 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-R-15624,CLASS 3?
MIL-R-15624,CLASS 3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-273-1000. 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