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MB61-9-15 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MB61-9-15: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, head_style: DOUBLE HEXAGON, grip_length: 0.927 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN, head_height: 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.5610 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-374-9232, 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
MB61-9-15
NSN: 5306-01-374-9232
FSC: 5306 — Bolts
CAGE: L4528 — LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC (CAN)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
head_styleDOUBLE HEXAGON
grip_length0.927 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN
head_height0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.5610 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN
thread_length0.725 INCHES NOMINAL IN
fastener_length1.646 INCHES MINIMUM AND 1.693 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_between_flats0.877 INCHES MAXIMUM IN
nominal_thread_diameter0.562 INCHES IN
NSN5306-01-374-9232
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MB61-9-15 · 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: 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.646 INCHES MINIMUM AND 1.693 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.725 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.562 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 0.927 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN
FASTENER LENGTH1.646 INCHES MINIMUM AND 1.693 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.725 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.562 INCHES IN
HEAD STYLEDOUBLE HEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.927 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.877 INCHES MAXIMUM IN
GRIP DIAMETER0.5610 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN
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 5
BM17019-9-15Reference document
Same NSN cross-reference
Reference document — Secondary reference
ST3M453-9-15Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VS3204-9-15Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
11825-9-15Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AIC753-9-15Same 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 MB61-9-15?
MB61-9-15 is a BOLT,CLOSE TOLERANCE.
What parts can replace MB61-9-15?
There are 5 known substitutes for MB61-9-15: BM17019-9-15, ST3M453-9-15, VS3204-9-15 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MB61-9-15?
MB61-9-15 is cataloged in the U.S. Government catalog under NSN 5306-01-374-9232. 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.