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3M49-6-16 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3M49-6-16: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK UNDERCUT, head_height: 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.755 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, thread_length: 0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN, screw_material: STEEL COMP 4140 OR STEEL COMP 4130. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-957-6563, 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
3M49-6-16
NSN: 5305-00-957-6563
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK UNDERCUT
head_height0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.755 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
thread_length0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN
screw_materialSTEEL COMP 4140 OR STEEL COMP 4130
fastener_length1.625 INCHES MINIMUM AND 1.672 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
internal_drive_styleHIGH-TORQUE
nominal_thread_diameter0.375 INCHES IN
screw_surface_treatmentCADMIUM AND CHROMATE
NSN5305-00-957-6563
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M49-6-16 · 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: 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: CADMIUM AND CHROMATE
•
FASTENER LENGTH: 1.625 INCHES MINIMUM AND 1.672 INCHES MAXIMUM IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-6758 MIL SPEC 2ND MATERIAL RESPONSE
•
THREAD LENGTH: 0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK UNDERCUT
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM AND CHROMATE
FASTENER LENGTH1.625 INCHES MINIMUM AND 1.672 INCHES MAXIMUM IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-6758 MIL SPEC 2ND MATERIAL RESPONSE
THREAD LENGTH0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL COMP 4140 OR STEEL COMP 4130
MINIMUM TENSILE STRENGTH180000 POUNDS PER SQUARE INCH LBS
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 3
HT403-6-16Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
54263-6-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
HT6U16Reference 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 3M49-6-16?
3M49-6-16 is a SCREW,MACHINE.
What parts can replace 3M49-6-16?
There are 3 known substitutes for 3M49-6-16: HT403-6-16, 54263-6-16, HT6U16. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M49-6-16?
3M49-6-16 is cataloged in the U.S. Government catalog under NSN 5305-00-957-6563. 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.