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Technical Data Sheet
PartsTable / COMPONENT / 9256
9256 ✓ 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 HEATING UNIT is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-285-9436, 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
9256
NSN: 5330-00-285-9436
FSC: 5330
CAGE: 12793 — AQUA-CHEM INC CLEAVER-BROOKS DIV (USA)
SPECIFICATIONS
general_characteristics_item_descriptionMOLDED HEATER ASSEMBLY USED IN PYROMETER TEST STAND; WRAPS AROUND PYROMETER DURING TESTING IN THE ENVIRONMENT CHAMBER; KEEPS MOISTURE FROM COLLECTING ON LENS OF PYROMETER
NSN5330-00-285-9436
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 9256 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
•
CASE STYLE: SQUARE
•
MATERIAL: STEEL CASE
•
SEALING ELEMENT STYLE: ANGULAR
•
ACCOMMODATED SHAFT DIAMETER: 1.125 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 1.828 INCHES NOMINAL IN
•
SEAL WIDTH: 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
CASE STYLESQUARE
MATERIALSTEEL CASE
MATERIALLEATHER OR RUBBER SEALING ELEMENT
SEALING ELEMENT STYLEANGULAR
ACCOMMODATED SHAFT DIAMETER1.125 INCHES NOMINAL IN
HOUSING BORE DIAMETER1.828 INCHES NOMINAL IN
SEAL WIDTH0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
5867705673Interchangeable
interchangeable cross-reference
interchangeable
20-554Interchangeable
interchangeable cross-reference
interchangeable
70-5673Interchangeable
interchangeable cross-reference
interchangeable
20554-1Interchangeable
interchangeable cross-reference
interchangeable
20554REVBInterchangeable
interchangeable cross-reference
interchangeable
2450582Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9256?
9256 is a HEATING UNIT.
What parts can replace 9256?
There are 20 known substitutes for 9256: 5867705673, 20-554, 70-5673 and 17 more. Substitute compatibility should be verified for your specific system.
Is 9256 still available?
9256 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026