PartsTable
Technical Data Sheet
PartsTable / O-RING / 58-908-30
58-908-30 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER FLUOROCARBON CLASS FPM, temp_rating: -30.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF, hardness_rating: 85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM, center_hole_diameter: 0.635 INCHES MINIMUM AND 0.653 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM, cross-sectional_height: 0.084 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-097-2778, 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
58-908-30
NSN: 5331-01-097-2778
FSC: 5331 — O-RING
CAGE: 28968 — CIRCOR INSTRUMENTATION TECHNOLOGIES, INC. DBA HOKE GYROLOK (USA)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
temp_rating-30.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF
hardness_rating85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM
center_hole_diameter0.635 INCHES MINIMUM AND 0.653 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.084 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
nondefinitive_spec/std_data1 TYPE AND 2 CLASS
departure_from_cited_documentCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
criticality_code_justificationZZZW
material_document_and_classificationMIL-R-83248 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-01-097-2778
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 58-908-30 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
•
DEPARTURE FROM CITED DOCUMENT: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
•
CROSS-SECTIONAL HEIGHT: 0.084 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
CENTER HOLE DIAMETER: 0.635 INCHES MINIMUM AND 0.653 INCHES MAXIMUM IN
•
HARDNESS RATING: 85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-83248 MIL SPEC SINGLE MATERIAL RESPONSE
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
ELONGATION PERCENTAGE: 125 MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
DEPARTURE FROM CITED DOCUMENTCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
CROSS-SECTIONAL HEIGHT0.084 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
CENTER HOLE DIAMETER0.635 INCHES MINIMUM AND 0.653 INCHES MAXIMUM IN
HARDNESS RATING85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-83248 MIL SPEC SINGLE MATERIAL RESPONSE
CRITICALITY CODE JUSTIFICATIONZZZW
ELONGATION PERCENTAGE125 MAXIMUM
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 2 CLASS
TEMP RATING-30.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
5331001675173Interchangeable
interchangeable cross-reference
interchangeable
20261 FIND 29,3Interchangeable
interchangeable cross-reference
interchangeable
123-908-5-90Interchangeable
interchangeable cross-reference
interchangeable
501-6937308PC132Interchangeable
interchangeable cross-reference
interchangeable
5200-029089Interchangeable
interchangeable cross-reference
interchangeable
AS3581-908Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 58-908-30?
58-908-30 is a O-RING.
What parts can replace 58-908-30?
There are 24 known substitutes for 58-908-30: 5331001675173, 20261 FIND 29,3, 123-908-5-90 and 21 more. Substitute compatibility should be verified for your specific system.
Is 58-908-30 still available?
58-908-30 is currently cancelled.
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Last verified: July 2026