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201804 — ISOLATOR,RADIO FREQUENCY REFLECT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

201804: ISOLATOR,RADIO FREQUENCY REFLECT.

ISOLATOR,RADIO FREQUENCY REFLECT. Key specifications include material: RUBBER CHLOROPRENE CLASS CR OVERALL, core_depth: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, head_height: 0.197 INCHES NOMINAL IN, thread_class: 3A EXTERNAL A, overall_width: 0.750 INCHES NOMINAL IN, thread_length: 0.302 INCHES NOMINAL EXTERNAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-695-8512, 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
201804
NSN: 5330-00-695-8512
NIINs: 006958512, 008757247, 012255536
FSC: 5330 — Packing and Gasket Materials
CAGE: 63728 — SEALCRAFT CORPORATION (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR OVERALL
core_depth0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
head_height0.197 INCHES NOMINAL IN
thread_class3A EXTERNAL A
overall_width0.750 INCHES NOMINAL IN
thread_length0.302 INCHES NOMINAL EXTERNAL IN
overall_height1.380 INCHES NOMINAL IN
overall_length1.540 INCHES NOMINAL IN
hardness_rating55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM OVERALL
connection_stylePLAIN
special_featuresSPECIAL SHIELDING
thread_directionRIGHT-HAND EXTERNAL
NSN5330-00-695-8512
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 201804 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
•
OUTER GROOVE DEPTH: 0.045 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.401 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
•
HARDNESS RATING: 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 3220 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SPECIAL
•
PERIPHERAL DIAMETER: 1.370 INCHES NOMINAL IN
•
OUTER GROOVE WIDTH: 0.100 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 1.115 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTER GROOVE DEPTH0.045 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.401 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
HARDNESS RATING55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 3220 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESPECIAL
PERIPHERAL DIAMETER1.370 INCHES NOMINAL IN
OUTER GROOVE WIDTH0.100 INCHES NOMINAL IN
CENTER HOLE DIAMETER1.115 INCHES NOMINAL IN
MATERIALRUBBER CHLOROPRENE CLASS CR OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
2083D30Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5246144Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 201804?
201804 is a ISOLATOR,RADIO FREQUENCY REFLECT.
What parts can replace 201804?
There are 2 known substitutes for 201804: 2083D30, 5246144. Substitute compatibility should be verified for your specific system.
What is the NSN for 201804?
201804 is cataloged in the U.S. Government catalog under NSN 5330-00-695-8512. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.