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3M50-4-13 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3M50-4-13: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 4130 OVERALL, head_style: FLAT COUNTERSUNK UNDERCUT, head_height: 0.0652 INCHES MINIMUM AND 0.0672 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN, thread_length: 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-413-6624, 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
3M50-4-13
NSN: 5305-00-413-6624
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 4130 OVERALL
head_styleFLAT COUNTERSUNK UNDERCUT
head_height0.0652 INCHES MINIMUM AND 0.0672 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length1.265 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
shoulder_length0.701 INCHES MINIMUM AND 0.723 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresFURNISHED WITH ONE RUBBER O RING
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
NSN5305-00-413-6624
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M50-4-13 · 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
•
HEAD HEIGHT: 0.0652 INCHES MINIMUM AND 0.0672 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.265 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.701 INCHES MINIMUM AND 0.723 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-S-5626 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-S-5000 MIL SPEC 2ND TREATMENT RESPONSE OR MIL-S-6049 MIL SPEC 3RD TREATMENT RESPONSE OR MIL-S-6098 MIL SPEC 4TH TREATMENT RESPONSE OR MIL-S-6758 MIL SPEC 5TH TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.2641 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.0652 INCHES MINIMUM AND 0.0672 INCHES MAXIMUM IN
FASTENER LENGTH1.265 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
SHOULDER LENGTH0.701 INCHES MINIMUM AND 0.723 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-S-5000 MIL SPEC 2ND TREATMENT RESPONSE OR MIL-S-6049 MIL SPEC 3RD TREATMENT RESPONSE OR MIL-S-6098 MIL SPEC 4TH TREATMENT RESPONSE OR MIL-S-6758 MIL SPEC 5TH TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.2641 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
THREAD DIRECTIONRIGHT-HAND
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 3
HT41UA13Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
HT409A4-13Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
54267-4-13Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 3M50-4-13?
3M50-4-13 is a SCREW,SHOULDER.
What parts can replace 3M50-4-13?
There are 3 known substitutes for 3M50-4-13: HT41UA13, HT409A4-13, 54267-4-13. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M50-4-13?
3M50-4-13 is cataloged in the U.S. Government catalog under NSN 5305-00-413-6624. 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.