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Technical Data Sheet
PartsTable / COMPONENT / 638-00
638-00 ✓ 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 MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1212, design_type: SOLID, end_diameter: 0.8120 INCHES NOMINAL IN, bore_diameter: 0.7480 INCHES MINIMUM AND 0.7510 INCHES MAXIMUM IN, overall_height: 0.5620 INCHES NOMINAL IN, special_features: CADMIUM PLATING PROHIBITED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-384-1024, 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
638-00
NSN: 5340-00-384-1024
FSC: 5340
CAGE: 64104 — DRESSER, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1212
design_typeSOLID
end_diameter0.8120 INCHES NOMINAL IN
bore_diameter0.7480 INCHES MINIMUM AND 0.7510 INCHES MAXIMUM IN
overall_height0.5620 INCHES NOMINAL IN
branch_quantity1
special_featuresCADMIUM PLATING PROHIBITED
termination_typeCONNECTOR RECEPTACLE ALL ENDS ALL CONDUCTORS
bore_taper_in_deg8.583
features_providedCASEHARDENED
first_step_length0.0940 INCHES NOMINAL IN
seat_angle_in_deg13.0
NSN5340-00-384-1024
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 638-00 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
•
FIRST STEP LENGTH: 0.0940 INCHES NOMINAL IN
•
SECOND STEP DIAMETER: 1.8120 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.2810 INCHES NOMINAL IN
•
BORE TAPER IN DEG: 8.583
•
FEATURES PROVIDED: CASEHARDENED
•
SECOND END DIAMETER: 0.8750 INCHES NOMINAL IN
•
END DIAMETER: 0.8120 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
TECHNICAL CHARACTERISTICS (FLIS)
FIRST STEP LENGTH0.0940 INCHES NOMINAL IN
SECOND STEP DIAMETER1.8120 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.2810 INCHES NOMINAL IN
BORE TAPER IN DEG8.583
FEATURES PROVIDEDCASEHARDENED
SECOND END DIAMETER0.8750 INCHES NOMINAL IN
END DIAMETER0.8120 INCHES NOMINAL IN
DESIGN TYPESOLID
MATERIALSTEEL COMP 1212
BORE DIAMETER0.7480 INCHES MINIMUM AND 0.7510 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
24305Interchangeable
interchangeable cross-reference
interchangeable
2540005213500Interchangeable
interchangeable cross-reference
interchangeable
63800Interchangeable
interchangeable cross-reference
interchangeable
600856-01Interchangeable
interchangeable cross-reference
interchangeable
L34218Interchangeable
interchangeable cross-reference
interchangeable
L34218P04Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 638-00?
638-00 is a MICROCIRCUIT,DIGITAL.
What parts can replace 638-00?
There are 11 known substitutes for 638-00: 24305, 2540005213500, 63800 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 638-00?
638-00 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-384-1024. 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