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X-154-3 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

X-154-3: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: DISHED HEXAGON, head_height: 0.208 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN, fastener_length: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN, special_features: HAS LOCK WASHER DIA 0.540/0.556 IN,0.125 IN WIDTH,0.078 IN THICKNESS,IT HAS A ZINC PHOSPHATE SURFACE TREATMENT IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-239-1056, 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
X-154-3
NSN: 5306-01-239-1056
FSC: 5306 — Bolts
CAGE: 52845 — KOHLER CO ENGINE PLANT DIV (USA)
SPECIFICATIONS
head_styleDISHED HEXAGON
head_height0.208 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
thread_class2A A
thread_length1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN
fastener_length1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN
special_featuresHAS LOCK WASHER DIA 0.540/0.556 IN,0.125 IN WIDTH,0.078 IN THICKNESS,IT HAS A ZINC PHOSPHATE SURFACE TREATMENT IN
thread_directionRIGHT-HAND
surface_treatmentPHOSPHATE ZINC OVERALL
width_between_flats0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
nominal_thread_diameter0.312 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5306-01-239-1056
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: X-154-3 · 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: 0.208 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: DISHED HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.208 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
FASTENER LENGTH1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN
THREAD LENGTH1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEDISHED HEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
SPECIAL FEATURESHAS LOCK WASHER DIA 0.540/0.556 IN,0.125 IN WIDTH,0.078 IN THICKNESS,IT HAS A ZINC PHOSPHATE SURFACE TREATMENT IN
SURFACE TREATMENTPHOSPHATE ZINC OVERALL
THREAD CLASS2A A
SUBSTITUTES & CROSS-REFERENCES 1
V-25 086 00Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is X-154-3?
X-154-3 is a BOLT,MACHINE.
What parts can replace X-154-3?
There is 1 known substitute for X-154-3: V-25 086 00. Substitute compatibility should be verified for your specific system.
What is the NSN for X-154-3?
X-154-3 is cataloged in the U.S. Government catalog under NSN 5306-01-239-1056. 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.