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Technical Data Sheet
420987 ITEM 26 ✓ 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 seal_width: 0.500 INCHES NOMINAL IN, housing_bore_diameter: 1.000 INCHES NOMINAL IN, accommodated_shaft_diameter: 0.250 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-306-9938, 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
420987 ITEM 26
NSN: 5330-01-306-9938
FSC: 5330
CAGE: 6K587 — WALLACE-MURRAY CORP OHIO GEAR DIV (USA)
SPECIFICATIONS
seal_width0.500 INCHES NOMINAL IN
housing_bore_diameter1.000 INCHES NOMINAL IN
accommodated_shaft_diameter0.250 INCHES NOMINAL IN
NSN5330-01-306-9938
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 420987 ITEM 26 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: 0.500 INCHES NOMINAL IN
HOUSING BORE DIAMETER: 1.000 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SEAL WIDTH0.500 INCHES NOMINAL IN
HOUSING BORE DIAMETER1.000 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
421006Interchangeable
interchangeable cross-reference
interchangeable
11756Interchangeable
interchangeable cross-reference
interchangeable
6515NCM093394Interchangeable
interchangeable cross-reference
interchangeable
421.006Interchangeable
interchangeable cross-reference
interchangeable
A 421006Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 420987 ITEM 26?
420987 ITEM 26 is a SEAL,PLAIN ENCASED.
What parts can replace 420987 ITEM 26?
There are 5 known substitutes for 420987 ITEM 26: 421006, 11756, 6515NCM093394 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 420987 ITEM 26?
420987 ITEM 26 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-306-9938. This indicates validated use in U.S. government and defense supply chains.
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