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Technical Data Sheet
PartsTable / COMPONENT / 125-01.437-250B
125-01.437-250B ✓ 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 125-01.437-250B is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-031-7143, 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
125-01.437-250B
NSN: 5330-01-031-7143
FSC: 5330
CAGE: 95272 — STILLMAN SEAL CORPORATION DIV STILLMAN SEAL CORPERATION (USA)
SPECIFICATIONS
Part Number125-01.437-250B
NSN5330-01-031-7143
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 125-01.437-250B 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
•
PERIPHERAL DIAMETER: 1.687 INCHES NOMINAL IN
•
MATERIAL: PLASTIC AND RUBBER SYNTHETIC OVERALL
•
CENTER HOLE DIAMETER: 1.437 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: U
•
TEMP RATING: -65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER1.687 INCHES NOMINAL IN
MATERIALPLASTIC AND RUBBER SYNTHETIC OVERALL
CENTER HOLE DIAMETER1.437 INCHES NOMINAL IN
SPECIAL FEATURESFURNISHED WITH ONE O-RING SPREADER
CROSS-SECTIONAL SHAPE STYLEU
TEMP RATING-65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
TE-348Interchangeable
interchangeable cross-reference
interchangeable
7-31770Interchangeable
interchangeable cross-reference
interchangeable
31770Interchangeable
interchangeable cross-reference
interchangeable
HA-31764Interchangeable
interchangeable cross-reference
interchangeable
92645Interchangeable
interchangeable cross-reference
interchangeable
F55AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 125-01.437-250B?
125-01.437-250B is a 125-01.437-250B.
What parts can replace 125-01.437-250B?
There are 12 known substitutes for 125-01.437-250B: TE-348, 7-31770, 31770 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 125-01.437-250B?
125-01.437-250B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-031-7143. 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