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Technical Data Sheet
PartsTable / COMPONENT / DF6503-175 NO. 74
DF6503-175 NO. 74 ✓ 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 DF6503-175 NO. 74 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 5330-01-378-8671, 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
DF6503-175 NO. 74
NSN: 5330-01-378-8671
FSC: 5330
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
Part NumberDF6503-175 NO. 74
NSN5330-01-378-8671
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: DF6503-175 NO. 74 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
•
STYLE DESIGNATOR: NON-CIRCULAR
•
INSIDE CORNER RADIUS: 1.500 INCHES NOMINAL IN
•
APERTURE WIDTH: 5.000 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 8
•
HARDNESS RATING: 50.0 ROCKWELL C MAXIMUM OVERALL
•
APERTURE LENGTH: 13.280 INCHES NOMINAL IN
•
OUTSIDE CORNER RADIUS: 2.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORNON-CIRCULAR
OVERALL WIDTH7.000 INCHES NOMINAL IN
INSIDE CORNER RADIUS1.500 INCHES NOMINAL IN
APERTURE WIDTH5.000 INCHES NOMINAL IN
BOLT HOLE QUANTITY8
HARDNESS RATING50.0 ROCKWELL C MAXIMUM OVERALL
APERTURE LENGTH13.280 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS2.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL LENGTH14.520 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
MIL-R-15624 CL- 1 30 X 60 X .12Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-15624 CL1Interchangeable
interchangeable cross-reference
interchangeable
MILR15624 CL1 3 6"W X 60"L X.12Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-15624 CL- 1 36IN W X .062Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-15624CL136X60X.0625Interchangeable
interchangeable cross-reference
interchangeable
211046362Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is DF6503-175 NO. 74?
DF6503-175 NO. 74 is a DF6503-175 NO. 74.
What parts can replace DF6503-175 NO. 74?
There are 6 known substitutes for DF6503-175 NO. 74: MIL-R-15624 CL- 1 30 X 60 X .12, MIL-R-15624 CL1, MILR15624 CL1 3 6"W X 60"L X.12 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for DF6503-175 NO. 74?
DF6503-175 NO. 74 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-378-8671. 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