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PartsTable / COMPONENT / 425578
425578 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: LEATHER OR RUBBER SYNTHETIC SEALING ELEMENT, case_style: SQUARE, seal_width: 0.500 INCHES NOMINAL IN, housing_bore_diameter: 2.250 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 1.750 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 5305-00-042-5578, 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
425578
NSN: 5305-00-042-5578
FSC: 5305
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialLEATHER OR RUBBER SYNTHETIC SEALING ELEMENT
case_styleSQUARE
seal_width0.500 INCHES NOMINAL IN
housing_bore_diameter2.250 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter1.750 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5305-00-042-5578
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 425578 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD DIRECTION: RIGHT-HAND
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: NAS672 80205 ASSN STD ALL TREATMENT RESPONSES OVERALL
•
THREAD CLASS: 2A A
•
THREAD SERIES DESIGNATOR: UNF
•
HEAD HEIGHT: 0.172 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
HEAD STYLE: HEXAGON
•
THREAD LENGTH: 0.335 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONNAS672 80205 ASSN STD ALL TREATMENT RESPONSES OVERALL
THREAD CLASS2A A
THREAD SERIES DESIGNATORUNF
HEAD HEIGHT0.172 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
HEAD STYLEHEXAGON
THREAD LENGTH0.335 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
FASTENER LENGTH0.406 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
72R302Interchangeable
interchangeable cross-reference
interchangeable
032078Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 425578?
425578 is a SEAL,PLAIN ENCASED.
What parts can replace 425578?
There are 2 known substitutes for 425578: 72R302, 032078. Substitute compatibility should be verified for your specific system.
What is the NSN for 425578?
425578 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-042-5578. 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