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Technical Data Sheet
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MB156-12DD56 — BOLT,SHEAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MB156-12DD56: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, head_style: SPLINE EXTENDED WASHER, grip_length: 2.438 INCHES MINIMUM AND 2.458 INCHES MAXIMUM IN, head_height: 0.472 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.9980 INCHES MINIMUM AND 0.9990 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-234-9403, 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
MB156-12DD56
NSN: 5306-01-234-9403
FSC: 5306 — Bolts
CAGE: L4528 — LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC (CAN)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
head_styleSPLINE EXTENDED WASHER
grip_length2.438 INCHES MINIMUM AND 2.458 INCHES MAXIMUM IN
head_height0.472 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.9980 INCHES MINIMUM AND 0.9990 INCHES MAXIMUM IN
thread_length0.927 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN
fastener_length3.485 INCHES MINIMUM AND 3.515 INCHES MAXIMUM IN
special_featuresTWO HOLES 90 DEGREES APART
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_between_flats0.222 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
NSN5306-01-234-9403
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MB156-12DD56 · 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
•
EXTENDED WASHER THICKNESS: 0.098 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.472 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.485 INCHES MINIMUM AND 3.515 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 1.384 INCHES MINIMUM AND 1.394 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.927 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN
•
SHANK UNTHREADED HOLE DIAMETER: 0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM ALL HOLES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.098 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN
HEAD HEIGHT0.472 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
FASTENER LENGTH3.485 INCHES MINIMUM AND 3.515 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER1.384 INCHES MINIMUM AND 1.394 INCHES MAXIMUM IN
THREAD LENGTH0.927 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN
SHANK UNTHREADED HOLE DIAMETER0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM ALL HOLES IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLESPLINE EXTENDED WASHER
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 6
VS3190-12DD56Reference document
Same NSN cross-reference
Reference document — Secondary reference
10116168Reference document
Same NSN cross-reference
Reference document — Informative reference only
S343-12DD56Reference document
Same NSN cross-reference
Reference document — Secondary reference
AIC763-12DD56Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
PBF1267-12DD56Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
122897-12DD56Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 MB156-12DD56?
MB156-12DD56 is a BOLT,SHEAR.
What parts can replace MB156-12DD56?
There are 6 known substitutes for MB156-12DD56: VS3190-12DD56, 10116168, S343-12DD56 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MB156-12DD56?
MB156-12DD56 is cataloged in the U.S. Government catalog under NSN 5306-01-234-9403. 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.