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Technical Data Sheet
PartsTable / COMPONENT / 203858
203858 ✓ 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 NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include angle: 10.0 DEGREES NOMINAL, material: ALUMINUM ALLOY OVERALL, peripheral_diameter: 7.281 INCHES NOMINAL IN, center_hole_diameter: 6.750 INCHES NOMINAL IN, cross-sectional_height: 0.703 INCHES NOMINAL IN, cross-sectional_shape_style: CUP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-083-7450, 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
203858
NSN: 5330-00-083-7450
FSC: 5330
CAGE: 84136 — ANCHOR/DARLING VALVE CO (USA)
SPECIFICATIONS
angle10.0 DEGREES NOMINAL
materialALUMINUM ALLOY OVERALL
peripheral_diameter7.281 INCHES NOMINAL IN
center_hole_diameter6.750 INCHES NOMINAL IN
cross-sectional_height0.703 INCHES NOMINAL IN
cross-sectional_shape_styleCUP
NSN5330-00-083-7450
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 203858 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
•
CROSS-SECTIONAL HEIGHT: 0.703 INCHES NOMINAL IN
•
PERIPHERAL DIAMETER: 7.281 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: CUP
•
ANGLE: 10.0 DEGREES NOMINAL
•
CENTER HOLE DIAMETER: 6.750 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.703 INCHES NOMINAL IN
PERIPHERAL DIAMETER7.281 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLECUP
ANGLE10.0 DEGREES NOMINAL
CENTER HOLE DIAMETER6.750 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
79NE1420Interchangeable
interchangeable cross-reference
interchangeable
203858Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 203858?
203858 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 203858?
There are 2 known substitutes for 203858: 79NE1420, 203858. Substitute compatibility should be verified for your specific system.
What is the NSN for 203858?
203858 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-083-7450. 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