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AES20U625625BB3A81 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

AES20U625625BB3A81: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL UNS K03104 OVERALL, head_style: FLAT CHAMFER, head_height: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.853 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, thread_length: 0.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-643-5063, 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
AES20U625625BB3A81
NSN: 5305-01-643-5063
FSC: 5305 — Screws
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
materialSTEEL UNS K03104 OVERALL
head_styleFLAT CHAMFER
head_height0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.853 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
thread_length0.625 INCHES NOMINAL IN
fastener_length0.625 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentZINC AND CHROMATE OVERALL
width_across_flats0.500 INCHES NOMINAL IN
internal_drive_styleHEXAGON
end_item_identification2350-01-577-0830
NSN5305-01-643-5063
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AES20U625625BB3A81 · 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
•
WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.625 INCHES NOMINAL IN
•
THREAD LENGTH: 0.625 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
•
SURFACE TREATMENT: ZINC AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
HEAD HEIGHT0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
FASTENER LENGTH0.625 INCHES NOMINAL IN
THREAD LENGTH0.625 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.625 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTZINC AND CHROMATE OVERALL
INTERNAL DRIVE STYLEHEXAGON
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW SHOULDER HEX SOCKET HEAD
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 AES20U625625BB3A81?
AES20U625625BB3A81 is a SCREW,SHOULDER.
What is the NSN for AES20U625625BB3A81?
AES20U625625BB3A81 is cataloged in the U.S. Government catalog under NSN 5305-01-643-5063. 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.