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21158-1390 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

21158-1390: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: RECESSED, seal_width: 0.375 INCHES NOMINAL IN, temp_rating: -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF, hardness_rating: 80.0 SHORE DUROMETER A NOMINAL OVERALL, housing_bore_diameter: 3.372 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-299-7633, 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
21158-1390
NSN: 5330-01-299-7633
FSC: 5330 — Packing and Gasket Materials
CAGE: 73680 — GARLOCK SEALING TECHNOLOGIES LLC DBA GARLOCK SEALING TECHNOLOGIES LLC (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleRECESSED
seal_width0.375 INCHES NOMINAL IN
temp_rating-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
hardness_rating80.0 SHORE DUROMETER A NOMINAL OVERALL
housing_bore_diameter3.372 INCHES NOMINAL IN
sealing_element_styleANGULAR
maximum_pressure_rating7.0 POUNDS PER SQUARE INCH (PSI) LBS
accommodated_shaft_diameter2.156 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed3000 FEET PER MINUTE FT
NSN5330-01-299-7633
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21158-1390 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
•
TEMP RATING: -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
•
SEAL WIDTH: 0.375 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
•
MAXIMUM PRESSURE RATING: 7.0 POUNDS PER SQUARE INCH (PSI) LBS
•
HARDNESS RATING: 80.0 SHORE DUROMETER A NOMINAL OVERALL
•
HOUSING BORE DIAMETER: 3.372 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 3000 FEET PER MINUTE FT
•
CASE STYLE: RECESSED
TECHNICAL CHARACTERISTICS
TEMP RATING-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
SEAL WIDTH0.375 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
MAXIMUM PRESSURE RATING7.0 POUNDS PER SQUARE INCH (PSI) LBS
HARDNESS RATING80.0 SHORE DUROMETER A NOMINAL OVERALL
HOUSING BORE DIAMETER3.372 INCHES NOMINAL IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED3000 FEET PER MINUTE FT
CASE STYLERECESSED
COLORBLACK
ACCOMMODATED SHAFT DIAMETER2.156 INCHES NOMINAL IN
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 4
63X1390Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
E-82013 PIECE 27Reference document
Same NSN cross-reference
Reference document — Secondary reference
1390Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
00044Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21158-1390?
21158-1390 is a SEAL,PLAIN ENCASED.
What parts can replace 21158-1390?
There are 4 known substitutes for 21158-1390: 63X1390, E-82013 PIECE 27, 1390 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21158-1390?
21158-1390 is cataloged in the U.S. Government catalog under NSN 5330-01-299-7633. 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.