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PartsTable / COMPONENT / BB58S49-059PC176
BB58S49-059PC176 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: DRIVE, head_height: 0.375 INCHES NOMINAL IN, thread_class: 2B, head_diameter: 2.125 INCHES NOMINAL IN, thread_length: 1.750 INCHES NOMINAL IN, screw_material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-544-6802, 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
BB58S49-059PC176
NSN: 5305-00-544-6802
FSC: 5305
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
head_styleDRIVE
head_height0.375 INCHES NOMINAL IN
thread_class2B
head_diameter2.125 INCHES NOMINAL IN
thread_length1.750 INCHES NOMINAL IN
screw_materialSTEEL
fastener_length2.188 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter1.000 INCHES IN
thread_quantity_per_inch12
thread_series_designatorUNF
NSN5305-00-544-6802
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BB58S49-059PC176 · 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 DIAMETER: 2.125 INCHES NOMINAL IN
•
SCREW MATERIAL: STEEL
•
THREAD QUANTITY PER INCH: 12
•
THREAD LENGTH: 1.750 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 1.000 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNF
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
HEAD DIAMETER2.125 INCHES NOMINAL IN
SCREW MATERIALSTEEL
THREAD QUANTITY PER INCH12
THREAD LENGTH1.750 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER1.000 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNF
THREAD CLASS2B
FASTENER LENGTH2.188 INCHES NOMINAL IN
HEAD STYLEDRIVE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
759Interchangeable
interchangeable cross-reference
interchangeable
CS14Interchangeable
interchangeable cross-reference
interchangeable
30176Interchangeable
interchangeable cross-reference
interchangeable
29P206403Interchangeable
interchangeable cross-reference
interchangeable
30-076Interchangeable
interchangeable cross-reference
interchangeable
76BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BB58S49-059PC176?
BB58S49-059PC176 is a SCREW,MACHINE.
What parts can replace BB58S49-059PC176?
There are 23 known substitutes for BB58S49-059PC176: 759, CS14, 30176 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BB58S49-059PC176?
BB58S49-059PC176 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-544-6802. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026