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Technical Data Sheet
21972 ✓ 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 SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include document_type: INDUSTRIAL DRAWING, usage_location: CONUS, document_source: 86403, document_identification: 3780200, component_document_origin: INDUSTRIAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-534-2342, 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
21972
NSN: 5330-00-534-2342
FSC: 5330
CAGE: 78165 — SPRING PERCH CO INC (USA)
SPECIFICATIONS
document_typeINDUSTRIAL DRAWING
usage_locationCONUS
document_source86403
document_identification3780200
component_document_originINDUSTRIAL
NSN5330-00-534-2342
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21972 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
HOUSING BORE DIAMETER: 1.627 INCHES MINIMUM AND 1.631 INCHES MAXIMUM IN
CASE STYLE: SQUARE
MATERIAL: RUBBER SYNTHETIC SEALING ELEMENT
SEALING ELEMENT STYLE: ANGULAR
ACCOMMODATED SHAFT DIAMETER: 1.375 INCHES NOMINAL IN
SEAL WIDTH: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HOUSING BORE DIAMETER1.627 INCHES MINIMUM AND 1.631 INCHES MAXIMUM IN
CASE STYLESQUARE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
MATERIALSTEEL CASE
SEALING ELEMENT STYLEANGULAR
ACCOMMODATED SHAFT DIAMETER1.375 INCHES NOMINAL IN
SEAL WIDTH0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
306170Interchangeable
interchangeable cross-reference
interchangeable
22862Interchangeable
interchangeable cross-reference
interchangeable
365608-2Interchangeable
interchangeable cross-reference
interchangeable
3514157Interchangeable
interchangeable cross-reference
interchangeable
4397674Interchangeable
interchangeable cross-reference
interchangeable
9905PL0789992Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21972?
21972 is a SEAL,PLAIN ENCASED.
What parts can replace 21972?
There are 8 known substitutes for 21972: 306170, 22862, 365608-2 and 5 more. Substitute compatibility should be verified for your specific system.
Is 21972 still available?
21972 is currently cancelled.
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