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23X6621 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

23X6621: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR SEALING ELEMENT, case_style: SQUARE, seal_width: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN, housing_bore_diameter: 12.750 INCHES NOMINAL IN, sealing_element_style: VERTICAL, end_item_identification: STEERING EQUIPMENT; ARLEIGH BURKE CLASS DDG. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-353-9540, 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
23X6621
NSN: 5330-01-353-9540
FSC: 5330 — Packing and Gasket Materials
CAGE: 73680 — GARLOCK SEALING TECHNOLOGIES LLC DBA GARLOCK SEALING TECHNOLOGIES LLC (USA)
SPECIFICATIONS
materialRUBBER ISOBUTYLENE-ISOPRENE CLASS IIR SEALING ELEMENT
case_styleSQUARE
seal_width0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
housing_bore_diameter12.750 INCHES NOMINAL IN
sealing_element_styleVERTICAL
end_item_identificationSTEERING EQUIPMENT; ARLEIGH BURKE CLASS DDG
accommodated_shaft_diameter12.730 INCHES MINIMUM AND 12.770 INCHES MAXIMUM IN
cross-sectional_shape_styleO-RING
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5330-01-353-9540
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 23X6621 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
•
SEAL WIDTH: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
•
SEALING ELEMENT STYLE: VERTICAL
•
HOUSING BORE DIAMETER: 12.750 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
CROSS-SECTIONAL SHAPE STYLE: O-RING
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 12.730 INCHES MINIMUM AND 12.770 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SEAL WIDTH0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
SEALING ELEMENT STYLEVERTICAL
HOUSING BORE DIAMETER12.750 INCHES NOMINAL IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
CROSS-SECTIONAL SHAPE STYLEO-RING
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER12.730 INCHES MINIMUM AND 12.770 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONSTEERING EQUIPMENT; ARLEIGH BURKE CLASS DDG
MATERIALSTEEL CORROSION RESISTING SPRING
MATERIALRUBBER ISOBUTYLENE-ISOPRENE CLASS IIR SEALING ELEMENT
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 1
1808475Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 23X6621?
23X6621 is a SEAL,PLAIN ENCASED.
What parts can replace 23X6621?
There is 1 known substitute for 23X6621: 1808475. Substitute compatibility should be verified for your specific system.
What is the NSN for 23X6621?
23X6621 is cataloged in the U.S. Government catalog under NSN 5330-01-353-9540. 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.