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B10188 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

B10188: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.375 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.875 INCHES MINIMUM IN, fastener_length: 2.437 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-360-7193, 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
B10188
NSN: 5306-00-360-7193
FSC: 5306 — Bolts
CAGE: 64104 — DRESSER, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.375 INCHES NOMINAL IN
thread_class3A A
thread_length0.875 INCHES MINIMUM IN
fastener_length2.437 INCHES NOMINAL IN
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.625 INCHES NOMINAL IN
nominal_thread_diameter0.438 INCHES IN
thread_quantity_per_inch14
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5306-00-360-7193
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: B10188 · 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: 0.375 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.437 INCHES NOMINAL IN
•
THREAD LENGTH: 0.875 INCHES MINIMUM IN
•
NOMINAL THREAD DIAMETER: 0.438 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.375 INCHES NOMINAL IN
FASTENER LENGTH2.437 INCHES NOMINAL IN
THREAD LENGTH0.875 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.438 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.625 INCHES NOMINAL IN
THREAD CLASS3A A
THREAD QUANTITY PER INCH14
SUBSTITUTES & CROSS-REFERENCES 1
4988743Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B10188?
B10188 is a BOLT,MACHINE.
What parts can replace B10188?
There is 1 known substitute for B10188: 4988743. Substitute compatibility should be verified for your specific system.
What is the NSN for B10188?
B10188 is cataloged in the U.S. Government catalog under NSN 5306-00-360-7193. 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.