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PartsTable / COMPONENT / 290-6D
290-6D ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2014 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.719 INCHES NOMINAL IN, thread_class: 3A A, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-040-9841, 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
290-6D
NSN: 5310-00-040-9841
FSC: 5310
CAGE: 00624 — EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2014 OVERALL
nut_styleTUBE COUPLING
nut_height0.719 INCHES NOMINAL IN
thread_class3A A
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
length_to_shoulder0.600 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
width_across_flats0.684 INCHES MINIMUM AND 0.691 INCHES MAXIMUM IN
nominal_thread_size0.562 INCHES IN
end_item_identificationGRUMMAN A-10 ACFT
smallest_inside_diameter0.440 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN
NSN5310-00-040-9841
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 290-6D · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
AN818-6DInterchangeable
interchangeable cross-reference
interchangeable
8176561Interchangeable
interchangeable cross-reference
interchangeable
1-03089D06Interchangeable
Same NIIN cross-reference
interchangeable
1158-06DInterchangeable
Same NIIN cross-reference
interchangeable
STSPG800D06Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 290-6D?
290-6D is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 290-6D?
There are 5 known substitutes for 290-6D: AN818-6D, 8176561, 1-03089D06 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 290-6D?
290-6D is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-040-9841. 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