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Technical Data Sheet
PartsTable / O-RING / 20237-6
20237-6 ✓ 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 SEMICONDUCTOR DEVICE,DIODE is a the manufacturer industrial component. Key specifications include material: SILICON SEMICONDUCTOR, overall_length: 1.150 INCHES MAXIMUM IN, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, mounting_method: THREADED STUD(S), outside_diameter: 3.605 INCHES MINIMUM AND 3.669 INCHES MAXIMUM IN, features_provided: HERMETICALLY SEALED CASE AND MOUNTING HARDWARE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-165-1955, 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
20237-6
NSN: 5331-00-165-1955
FSC: 5331 — O-RING
CAGE: 24235 — WILLIAMS INTERNATIONAL CO., L.L.C. (USA)
SPECIFICATIONS
materialSILICON SEMICONDUCTOR
overall_length1.150 INCHES MAXIMUM IN
hardness_rating75.0 SHORE DUROMETER A NOMINAL
mounting_methodTHREADED STUD(S)
outside_diameter3.605 INCHES MINIMUM AND 3.669 INCHES MAXIMUM IN
features_providedHERMETICALLY SEALED CASE AND MOUNTING HARDWARE
nominal_thread_size0.190 INCHES IN
center_hole_diameter3.335 INCHES MINIMUM AND 3.383 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
end_item_identification2350-01-248-7619
thread_series_designatorUNF
NSN5331-00-165-1955
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 20237-6 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
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
OUTSIDE DIAMETER: 3.605 INCHES MINIMUM AND 3.669 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 3.335 INCHES MINIMUM AND 3.383 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
TECHNICAL CHARACTERISTICS (FLIS)
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
ELONGATION PERCENTAGE125 MAXIMUM
OUTSIDE DIAMETER3.605 INCHES MINIMUM AND 3.669 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
CENTER HOLE DIAMETER3.335 INCHES MINIMUM AND 3.383 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
AMS7276Interchangeable
interchangeable cross-reference
interchangeable
AS3209-145Interchangeable
interchangeable cross-reference
interchangeable
2-145V1164-75Interchangeable
interchangeable cross-reference
interchangeable
AS3209-114Interchangeable
interchangeable cross-reference
interchangeable
J221P022Interchangeable
interchangeable cross-reference
interchangeable
S1D10048 ITEM 39Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20237-6?
20237-6 is a SEMICONDUCTOR DEVICE,DIODE.
What parts can replace 20237-6?
There are 32 known substitutes for 20237-6: AMS7276, AS3209-145, 2-145V1164-75 and 29 more. Substitute compatibility should be verified for your specific system.
Is 20237-6 still available?
20237-6 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026