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PartsTable / COMPONENT / BB29181
BB29181 ✓ 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 SETSCREW is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, head_style: HEXAGON, head_height: 0.640 INCHES MINIMUM AND 0.672 INCHES MAXIMUM IN, point_style: FLAT, thread_class: 3A A, thread_length: 0.312 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-737-7788, 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
BB29181
NSN: 5305-00-737-7788
FSC: 5305
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
head_styleHEXAGON
head_height0.640 INCHES MINIMUM AND 0.672 INCHES MAXIMUM IN
point_styleFLAT
thread_class3A A
thread_length0.312 INCHES NOMINAL IN
fastener_length0.312 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.327 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
internal_drive_styleW/O INTERNAL DRIVE
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch28
NSN5305-00-737-7788
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BB29181 · 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
•
FASTENER LENGTH: 0.312 INCHES NOMINAL IN
•
INTERNAL DRIVE STYLE: W/O INTERNAL DRIVE
•
THREAD SERIES DESIGNATOR: UNF
•
MATERIAL: COPPER ALLOY OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 28
•
POINT STYLE: FLAT
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.312 INCHES NOMINAL IN
INTERNAL DRIVE STYLEW/O INTERNAL DRIVE
THREAD SERIES DESIGNATORUNF
MATERIALCOPPER ALLOY OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH28
POINT STYLEFLAT
THREAD CLASS3A A
HEAD STYLEHEXAGON
NOMINAL THREAD DIAMETER0.250 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
007706200Interchangeable
interchangeable cross-reference
interchangeable
203050Interchangeable
interchangeable cross-reference
interchangeable
24101060AInterchangeable
interchangeable cross-reference
interchangeable
218-540Interchangeable
interchangeable cross-reference
interchangeable
740Interchangeable
interchangeable cross-reference
interchangeable
200057Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BB29181?
BB29181 is a SETSCREW.
What parts can replace BB29181?
There are 6 known substitutes for BB29181: 007706200, 203050, 24101060A and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BB29181?
BB29181 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-737-7788. 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