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AES20C500375EA5A31 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

AES20C500375EA5A31: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, head_style: FLAT CHAMFER, head_height: 0.302 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.729 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, thread_length: 0.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-678-9892, 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
AES20C500375EA5A31
NSN: 5305-01-678-9892
FSC: 5305 — Screws
CAGE: 05047 — THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
head_styleFLAT CHAMFER
head_height0.302 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.729 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
thread_length0.625 INCHES NOMINAL IN
shoulder_shapeROUND ALL SHOULDERS
fastener_length1.00 INCHES NOMINAL IN
shoulder_length0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM ALL SHOULDERS IN
thread_directionRIGHT-HAND
shoulder_diameter0.4960 INCHES MINIMUM AND 0.4980 INCHES MAXIMUM ALL SHOULDERS IN
surface_treatmentPASSIVATE OVERALL
NSN5305-01-678-9892
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AES20C500375EA5A31 · 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: 0.250 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.302 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.00 INCHES NOMINAL IN
•
SHOULDER LENGTH: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM ALL SHOULDERS IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.4960 INCHES MINIMUM AND 0.4980 INCHES MAXIMUM ALL SHOULDERS IN
•
THREAD LENGTH: 0.625 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND ALL SHOULDERS
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
HEAD HEIGHT0.302 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
FASTENER LENGTH1.00 INCHES NOMINAL IN
SHOULDER LENGTH0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM ALL SHOULDERS IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.4960 INCHES MINIMUM AND 0.4980 INCHES MAXIMUM ALL SHOULDERS IN
THREAD LENGTH0.625 INCHES NOMINAL IN
SHOULDER SHAPEROUND ALL SHOULDERS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM F879,304 ONLY,CONDITION CW AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.3750 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 AES20C500375EA5A31?
AES20C500375EA5A31 is a SCREW,SHOULDER.
What is the NSN for AES20C500375EA5A31?
AES20C500375EA5A31 is cataloged in the U.S. Government catalog under NSN 5305-01-678-9892. 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.