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3M105-4-3 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3M105-4-3: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.182 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.357 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, thread_length: 0.303 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-015-5224, 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
3M105-4-3
NSN: 5305-01-015-5224
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.182 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.357 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
thread_length0.303 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
shoulder_length0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresKNURLED HEAD OPTIONAL
thread_directionRIGHT-HAND
shoulder_diameter0.245 INCHES MINIMUM AND 0.248 INCHES MAXIMUM FIRST SHOULDER IN
NSN5305-01-015-5224
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M105-4-3 · 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: 0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.182 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.245 INCHES MINIMUM AND 0.248 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.303 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-H-6875 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
HEAD HEIGHT0.182 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
FASTENER LENGTH0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
SHOULDER LENGTH0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER0.245 INCHES MINIMUM AND 0.248 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.303 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-H-6875 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
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 3M105-4-3?
3M105-4-3 is a SCREW,SHOULDER.
What is the NSN for 3M105-4-3?
3M105-4-3 is cataloged in the U.S. Government catalog under NSN 5305-01-015-5224. 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.