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Technical Data Sheet
PartsTable / COMPONENT / 72-837
72-837 ✓ 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 color: CLEAR LENS, material: COPPER ALLOY HOLDER, thread_class: 2B, thread_series: UNS, overall_length: 0.625 INCHES NOMINAL IN, mounting_method: THREAD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-078-0327, 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
72-837
NSN: 5330-00-078-0327
FSC: 5330
CAGE: 23926 — KOMATSU AMERICA CORPORATION (USA)
SPECIFICATIONS
colorCLEAR LENS
materialCOPPER ALLOY HOLDER
thread_class2B
thread_seriesUNS
overall_length0.625 INCHES NOMINAL IN
mounting_methodTHREAD
thread_diameter0.812 INCHES IN
thread_quantity27 PER INCH
overall_diameter0.875 INCHES NOMINAL IN
special_featuresSTYLE 83 EXCEPT DOME SHAPE LENS
style_designatorCONVEX
thread_directionRIGHT-HAND
NSN5330-00-078-0327
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 72-837 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
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
SEAL WIDTH: 0.500 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
•
HOUSING BORE DIAMETER: 3.251 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 2.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
SEAL WIDTH0.500 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
HOUSING BORE DIAMETER3.251 INCHES NOMINAL IN
MATERIALSTEEL CASE
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER2.500 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
TEMP RATING-50.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
410519SSRInterchangeable
interchangeable cross-reference
interchangeable
M2621AInterchangeable
interchangeable cross-reference
interchangeable
301-SN-935Interchangeable
interchangeable cross-reference
interchangeable
72-1237-300Interchangeable
interchangeable cross-reference
interchangeable
12Z7502PC88Interchangeable
interchangeable cross-reference
interchangeable
72-837Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 72-837?
72-837 is a SEAL,PLAIN ENCASED.
What parts can replace 72-837?
There are 10 known substitutes for 72-837: 410519SSR, M2621A, 301-SN-935 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 72-837?
72-837 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-078-0327. 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