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Technical Data Sheet
PartsTable / COMPONENT / QQ-A-250/8F
QQ-A-250/8F ✓ 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 QQ-A-250/8F 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 5340-01-253-0268, 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
QQ-A-250/8F
NSN: 5340-01-253-0268
FSC: 5340
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
Part NumberQQ-A-250/8F
NSN5340-01-253-0268
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: QQ-A-250/8F 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
•
DESIGN TYPE: FRICTION
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 4.500 INCHES NOMINAL IN
•
INSIDE DIAMETER LENGTH: 0.468 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/8, ALLOY 5052, H32 FED SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: ALUMINUM ALLOY 5052
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURES0.032 IN. THK; 0.500 IN. O/A LG IN
DESIGN TYPEFRICTION
OPENING INSIDE DIAMETER FOR WHICH DESIGNED4.500 INCHES NOMINAL IN
INSIDE DIAMETER LENGTH0.468 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/8, ALLOY 5052, H32 FED SPEC SINGLE MATERIAL RESPONSE
MATERIALALUMINUM ALLOY 5052
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
50-4553Interchangeable
interchangeable cross-reference
interchangeable
SU2951-51Interchangeable
interchangeable cross-reference
interchangeable
18-4040Interchangeable
interchangeable cross-reference
interchangeable
4-1/2 DOCInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is QQ-A-250/8F?
QQ-A-250/8F is a QQ-A-250/8F.
What parts can replace QQ-A-250/8F?
There are 4 known substitutes for QQ-A-250/8F: 50-4553, SU2951-51, 18-4040 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for QQ-A-250/8F?
QQ-A-250/8F is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-253-0268. 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