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PartsTable / COMPONENT / DAA3430D028-003
DAA3430D028-003 ✓ 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

NUT,PLAIN,EXTENDED WASHER,ROUND. Key specifications include material: TITANIUM ALLOY UNS R56400 OVERALL, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.340 INCHES NOMINAL IN, special_features: BODY DIA. 0.518 IN.;SURFACE TREAT K-103,CAGEC 76823,B4 PRIMER; LOW OBSERVABLE ITEM IN, 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 5310-01-349-9629, 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
DAA3430D028-003
NSN: 5310-01-349-9629
FSC: 5310
CAGE: 76823 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN IS DIV NORTHROP GRUMMAN AERONAUTICS SYSTEMS (USA)
SPECIFICATIONS
materialTITANIUM ALLOY UNS R56400 OVERALL
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.340 INCHES NOMINAL IN
special_featuresBODY DIA. 0.518 IN.;SURFACE TREAT K-103,CAGEC 76823,B4 PRIMER; LOW OBSERVABLE ITEM IN
thread_directionRIGHT-HAND
washer_thickness0.040 INCHES NOMINAL IN
countersink_angle110.0 DEGREES NOMINAL BOSS
surface_treatmentPAINT LUSTERLESS OVERALL EXCEPT THREADS
nominal_thread_size0.4375 INCHES IN
supplementary_featuresUSED AS INSERT,PRESSURE TAP W/PN -001
washer_outside_diameter1.000 INCHES NOMINAL IN
NSN5310-01-349-9629
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: DAA3430D028-003 · 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
KEY FEATURES
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.4375 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
THREAD QUANTITY PER INCH: 20
•
MATERIAL: TITANIUM ALLOY UNS R56400 OVERALL
•
SUPPLEMENTARY FEATURES: USED AS INSERT,PRESSURE TAP W/PN -001
•
COUNTERSINK ANGLE: 110.0 DEGREES NOMINAL BOSS
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-T-9047,TYPE 3,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.4375 INCHES IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH20
MATERIALTITANIUM ALLOY UNS R56400 OVERALL
SUPPLEMENTARY FEATURESUSED AS INSERT,PRESSURE TAP W/PN -001
COUNTERSINK ANGLE110.0 DEGREES NOMINAL BOSS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-T-9047,TYPE 3,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
WASHER THICKNESS0.040 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
3598Interchangeable
interchangeable cross-reference
interchangeable
A021A0Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is DAA3430D028-003?
DAA3430D028-003 is a NUT,PLAIN,EXTENDED WASHER,ROUND.
What parts can replace DAA3430D028-003?
There are 2 known substitutes for DAA3430D028-003: 3598, A021A0. Substitute compatibility should be verified for your specific system.
What is the NSN for DAA3430D028-003?
DAA3430D028-003 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-349-9629. 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