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Technical Data Sheet
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563-6404329-61 — SCREW,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

563-6404329-61: SCREW,EXTERNALLY RELIEVED BODY.

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, head_style: HEXAGON EXTENDED WASHER, head_height: 0.160 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.390 INCHES NOMINAL IN, fastener_length: 0.470 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-377-9986, 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
563-6404329-61
NSN: 5305-01-377-9986
FSC: 5305 — Screws
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
head_styleHEXAGON EXTENDED WASHER
head_height0.160 INCHES NOMINAL IN
thread_class2A A
thread_length0.390 INCHES NOMINAL IN
fastener_length0.470 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.500 INCHES NOMINAL IN
internal_drive_styleSLOT
nominal_thread_diameter0.164 INCHES IN
extended_washer_diameter0.440 INCHES NOMINAL IN
first_diameter_from_head0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
NSN5305-01-377-9986
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 563-6404329-61 · 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
•
EXTENDED WASHER THICKNESS: 0.010 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.160 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.470 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 0.440 INCHES NOMINAL IN
•
THREAD LENGTH: 0.390 INCHES NOMINAL IN
•
FIRST DIAMETER FROM HEAD: 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: HEXAGON EXTENDED WASHER
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.010 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
HEAD HEIGHT0.160 INCHES NOMINAL IN
FASTENER LENGTH0.470 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER0.440 INCHES NOMINAL IN
THREAD LENGTH0.390 INCHES NOMINAL IN
FIRST DIAMETER FROM HEAD0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEHEXAGON EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.500 INCHES NOMINAL IN
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 1
563-7409379-61Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 563-6404329-61?
563-6404329-61 is a SCREW,EXTERNALLY RELIEVED BODY.
What parts can replace 563-6404329-61?
There is 1 known substitute for 563-6404329-61: 563-7409379-61. Substitute compatibility should be verified for your specific system.
What is the NSN for 563-6404329-61?
563-6404329-61 is cataloged in the U.S. Government catalog under NSN 5305-01-377-9986. 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.