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NAS8403U8 — SCREW,ASSEMBLED WASHER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

NAS8403U8: SCREW,ASSEMBLED WASHER.

The SCREW,ASSEMBLED WASHER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: ROUND EXTENDED WASHER, head_height: 0.094 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.357 INCHES NOMINAL IN, thread_length: 0.495 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-439-6682, 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
NAS8403U8
NSN: 5305-01-439-6682
FSC: 5305 — Screws
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleROUND EXTENDED WASHER
head_height0.094 INCHES NOMINAL IN
thread_class3A A
head_diameter0.357 INCHES NOMINAL IN
thread_length0.495 INCHES NOMINAL IN
fastener_length0.495 INCHES NOMINAL IN
washer_quantity1
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
primary_washer_styleFLAT
end_item_identificationHH60J COAST GUARD HELICOPTER
NSN5305-01-439-6682
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: NAS8403U8 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
EXTENDED WASHER THICKNESS: 0.495 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.094 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.495 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 0.428 INCHES NOMINAL IN
•
PRIMARY WASHER OUTSIDE DIAMETER: 0.428 INCHES NOMINAL IN
•
THREAD LENGTH: 0.495 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.095 INCHES IN
TECHNICAL CHARACTERISTICS
NONMACHINE NOMINAL THREAD DIAMETER0.190 INCHES IN
EXTENDED WASHER THICKNESS0.495 INCHES NOMINAL IN
HEAD HEIGHT0.094 INCHES NOMINAL IN
FASTENER LENGTH0.495 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER0.428 INCHES NOMINAL IN
PRIMARY WASHER OUTSIDE DIAMETER0.428 INCHES NOMINAL IN
THREAD LENGTH0.495 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.095 INCHES IN
HEAD STYLEROUND EXTENDED WASHER
PRIMARY WASHER STYLEFLAT
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NAS8403U8?
NAS8403U8 is a SCREW,ASSEMBLED WASHER.
What is the NSN for NAS8403U8?
NAS8403U8 is cataloged in the U.S. Government catalog under NSN 5305-01-439-6682. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.