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Technical Data Sheet
PartsTable / COMPONENT / 4238-1
4238-1 ✓ 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 color: WHITE OVERALL, width: 0.438 INCHES NOMINAL IN, length: 3.500 INCHES NOMINAL IN, material: PAPER, case_style: SQUARE, cone_width: 1.1406 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 5330-00-143-8648, 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
4238-1
NSN: 5330-00-143-8648
FSC: 5330
CAGE: 91251 — FREUDENBERG-NOK GENERAL PARTNERSHIP DBA FREDENBERG-NOK SEALS DIVISION (USA)
SPECIFICATIONS
colorWHITE OVERALL
width0.438 INCHES NOMINAL IN
length3.500 INCHES NOMINAL IN
materialPAPER
case_styleSQUARE
cone_width1.1406 INCHES NOMINAL IN
seal_width0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
bore_diameter3.8125 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
adhesive_locationBACK
attachment_methodPRESSURE SENSITIVE ADHESIVE
basic_shape_styleRECTANGULAR
NSN5330-00-143-8648
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4238-1 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
•
CASE STYLE: SQUARE
•
MATERIAL: RUBBER SEALING ELEMENT
•
MATERIAL DOCUMENT AND CLASSIFICATION: -4601,91547 MFR REF SINGLE MATERIAL RESPONSE SEALING ELEMENT
•
ACCOMMODATED SHAFT DIAMETER: 0.445 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
•
SEAL WIDTH: 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
•
HOUSING BORE DIAMETER: 1.001 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CASE STYLESQUARE
MATERIALRUBBER SEALING ELEMENT
MATERIAL DOCUMENT AND CLASSIFICATION-4601,91547 MFR REF SINGLE MATERIAL RESPONSE SEALING ELEMENT
MATERIALSTEEL CASE
MATERIAL DOCUMENT AND CLASSIFICATIONJ403E NOS 1010,81343 MFR REF SINGLE MATERIAL RESPONSE CASE
ACCOMMODATED SHAFT DIAMETER0.445 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
SEAL WIDTH0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
HOUSING BORE DIAMETER1.001 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED42000 FEET PER MINUTE FT
SEALING ELEMENT STYLEANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
157065H10Interchangeable
interchangeable cross-reference
interchangeable
TSF 42381Interchangeable
interchangeable cross-reference
interchangeable
27876Interchangeable
interchangeable cross-reference
interchangeable
42381Interchangeable
interchangeable cross-reference
interchangeable
42-379Interchangeable
interchangeable cross-reference
interchangeable
1-300-234-02Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4238-1?
4238-1 is a MICROCIRCUIT,DIGITAL.
What parts can replace 4238-1?
There are 6 known substitutes for 4238-1: 157065H10, TSF 42381, 27876 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4238-1?
4238-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-143-8648. 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