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AES20U625C50BB3A91 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

AES20U625C50BB3A91: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, thread_class: 2A A, chamfer_angle: 45.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM, head_diameter: 0.853 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-700-4170, 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
AES20U625C50BB3A91
NSN: 5305-01-700-4170
FSC: 5305 — Screws
CAGE: 05047 — THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
thread_class2A A
chamfer_angle45.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM
head_diameter0.853 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
thread_length0.750 INCHES NOMINAL IN
shoulder_shapeROUND OVERALL
fastener_length3.500 INCHES NOMINAL IN
shoulder_length2.745 INCHES MINIMUM AND 2.755 INCHES MAXIMUM OVERALL IN
thread_directionRIGHT-HAND
shoulder_diameter0.6210 INCHES MINIMUM AND 0.6230 INCHES MAXIMUM OVERALL IN
NSN5305-01-700-4170
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AES20U625C50BB3A91 · 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: 0.3125 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.500 INCHES NOMINAL IN
•
SHOULDER LENGTH: 2.745 INCHES MINIMUM AND 2.755 INCHES MAXIMUM OVERALL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633, TYPE II, SC 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.6210 INCHES MINIMUM AND 0.6230 INCHES MAXIMUM OVERALL IN
•
THREAD LENGTH: 0.750 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.3125 INCHES NOMINAL IN
HEAD HEIGHT0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
FASTENER LENGTH3.500 INCHES NOMINAL IN
SHOULDER LENGTH2.745 INCHES MINIMUM AND 2.755 INCHES MAXIMUM OVERALL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633, TYPE II, SC 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.6210 INCHES MINIMUM AND 0.6230 INCHES MAXIMUM OVERALL IN
THREAD LENGTH0.750 INCHES NOMINAL IN
SHOULDER SHAPEROUND OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A574, ALLOY STEEL AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.500 INCHES 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

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 AES20U625C50BB3A91?
AES20U625C50BB3A91 is a SCREW,SHOULDER.
What is the NSN for AES20U625C50BB3A91?
AES20U625C50BB3A91 is cataloged in the U.S. Government catalog under NSN 5305-01-700-4170. 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.