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Technical Data Sheet
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BB301-16-20 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BB301-16-20: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.756 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, thread_length: 0.685 INCHES NOMINAL IN, screw_material: STEEL COMP 431, fastener_length: 1.840 INCHES MINIMUM AND 1.860 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-235-9651, 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
BB301-16-20
NSN: 5305-01-235-9651
FSC: 5305 — Screws
CAGE: L4528 — LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC (CAN)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.756 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
thread_length0.685 INCHES NOMINAL IN
screw_materialSTEEL COMP 431
fastener_length1.840 INCHES MINIMUM AND 1.860 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
internal_drive_styleHIGH-TORQUE
nominal_thread_diameter0.375 INCHES IN
screw_surface_treatmentPASSIVATE
thread_quantity_per_inch24
NSN5305-01-235-9651
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BB301-16-20 · 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
•
SCREW SURFACE TREATMENT: PASSIVATE
•
FASTENER LENGTH: 1.840 INCHES MINIMUM AND 1.860 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.685 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL COMP 431
•
INTERNAL DRIVE STYLE: HIGH-TORQUE
TECHNICAL CHARACTERISTICS
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH1.840 INCHES MINIMUM AND 1.860 INCHES MAXIMUM IN
THREAD LENGTH0.685 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL COMP 431
INTERNAL DRIVE STYLEHIGH-TORQUE
COUNTERSINK ANGLE100.0 DEGREES NOMINAL
THREAD CLASS3A A
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 BB301-16-20?
BB301-16-20 is a SCREW,MACHINE.
What is the NSN for BB301-16-20?
BB301-16-20 is cataloged in the U.S. Government catalog under NSN 5305-01-235-9651. This indicates validated use in U.S. government and defense supply chains.
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