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PartsTable / COMPONENT / F8491
F8491 ✓ 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 ADAPTER,GOVERNOR VALVE is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: SQUARE, seal_width: 0.469 INCHES NOMINAL IN, component_quantity: 28, housing_bore_diameter: 3.999 INCHES NOMINAL IN, sealing_element_style: VERTICAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-413-6019, 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
F8491
NSN: 5330-00-413-6019
FSC: 5330
CAGE: 21416 — HARSCO CORP FAIRMONT RAILWAY MOTORS DIV (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.469 INCHES NOMINAL IN
component_quantity28
housing_bore_diameter3.999 INCHES NOMINAL IN
sealing_element_styleVERTICAL
accommodated_shaft_diameter3.000 INCHES NOMINAL IN
nonsupply_items_and_quantitiesMAIN VALVE 1;GASKET 4;GUIDE 1;BUSHING 1;NUT 2;ADAPTER 1;PIN 2;LEVER 1;PISTON 1;ROD 1;SCREW 5;LOCKNUT 1;BRACKET 1;STUD 3;COUPLING 1;STEM 2
NSN5330-00-413-6019
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: F8491 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: 0.469 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
HOUSING BORE DIAMETER: 3.999 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
•
ACCOMMODATED SHAFT DIAMETER: 3.000 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: VERTICAL
TECHNICAL CHARACTERISTICS (FLIS)
SEAL WIDTH0.469 INCHES NOMINAL IN
CASE STYLESQUARE
HOUSING BORE DIAMETER3.999 INCHES NOMINAL IN
MATERIALSTEEL CASE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
ACCOMMODATED SHAFT DIAMETER3.000 INCHES NOMINAL IN
SEALING ELEMENT STYLEVERTICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
45984Interchangeable
interchangeable cross-reference
interchangeable
60986Interchangeable
interchangeable cross-reference
interchangeable
429213Interchangeable
interchangeable cross-reference
interchangeable
6705255 KIT 429213Interchangeable
interchangeable cross-reference
interchangeable
F-8491Interchangeable
interchangeable cross-reference
interchangeable
F4857Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F8491?
F8491 is a ADAPTER,GOVERNOR VALVE.
What parts can replace F8491?
There are 6 known substitutes for F8491: 45984, 60986, 429213 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for F8491?
F8491 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-413-6019. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026