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Technical Data Sheet
QQ-N-281 CLASSA ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The UNION,TUBE is a the manufacturer industrial component. Key specifications include length: 831.000 FEET NOMINAL FT, material: NICKEL ALLOY OVERALL, seat_type: GASKET, head_style: HEXAGON, head_height: 0.922 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN, thread_class: 3A A. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 9530-00-239-4455, 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-N-281 CLASSA
NSN: 9530-00-239-4455
FSC: 9530
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
length831.000 FEET NOMINAL FT
materialNICKEL ALLOY OVERALL
seat_typeGASKET
head_styleHEXAGON
head_height0.922 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN
thread_class3A A
thread_length1.250 INCHES NOMINAL IN
heat_treatmentANNEALED
connection_typeUNTHREADED INTERNAL TUBE FIRST END
fastener_length1.250 INCHES NOMINAL IN
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
style_designatorTHREADED
NSN9530-00-239-4455
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available UNION,TUBE TITLE COMPONENT PN QQ-N-281 CLASSA MFR UNION,TUBE
KEY FEATURES
CROSS SECTION OUTSIDE DIAMETER: 0.438 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA: A CLASS
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281, CLASS A FED SPEC 1ST MATERIAL RESPONSE
MATERIAL: NICKEL ALLOY 400
WEIGHT PER UNIT MEASURE: 0.580 POUNDS PER LINEAR FOOT LBS
LENGTH: 6.000 FEET MINIMUM AND 24.000 FEET MAXIMUM FT
FABRICATION METHOD: HOT FINISH
BASIC SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
CROSS SECTION OUTSIDE DIAMETER0.438 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATAA CLASS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281, CLASS A FED SPEC 1ST MATERIAL RESPONSE
MATERIALNICKEL ALLOY 400
WEIGHT PER UNIT MEASURE0.580 POUNDS PER LINEAR FOOT LBS
LENGTH6.000 FEET MINIMUM AND 24.000 FEET MAXIMUM FT
FABRICATION METHODHOT FINISH
BASIC SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
QQN281CLASSAInterchangeable
interchangeable cross-reference
interchangeable
QQ-N-281Interchangeable
interchangeable cross-reference
interchangeable
B16.1 ANNEALEDInterchangeable
interchangeable cross-reference
interchangeable
B16.1Interchangeable
interchangeable cross-reference
interchangeable
AMS2806BInterchangeable
interchangeable cross-reference
interchangeable
QQ-N-281D CLASS A SPR TMPRInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is QQ-N-281 CLASSA?
QQ-N-281 CLASSA is a UNION,TUBE.
What parts can replace QQ-N-281 CLASSA?
There are 11 known substitutes for QQ-N-281 CLASSA: QQN281CLASSA, QQ-N-281, B16.1 ANNEALED and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for QQ-N-281 CLASSA?
QQ-N-281 CLASSA is cataloged in the Federal Logistics Information System (FLIS) under NSN 9530-00-239-4455. This indicates validated use in U.S. government and defense supply chains.
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