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MB61-3-16 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MB61-3-16: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DOUBLE HEXAGON, grip_length: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN, head_height: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-133-2193, 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
MB61-3-16
NSN: 5306-01-133-2193
FSC: 5306 — Bolts
CAGE: 73197 — HI-SHEAR CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDOUBLE HEXAGON
grip_length0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
head_height0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
thread_length0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN
fastener_length1.315 INCHES MINIMUM AND 1.362 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
width_between_flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
nominal_thread_diameter0.190 INCHES IN
thread_quantity_per_inch32
NSN5306-01-133-2193
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MB61-3-16 · 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: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.315 INCHES MINIMUM AND 1.362 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
FASTENER LENGTH1.315 INCHES MINIMUM AND 1.362 INCHES MAXIMUM IN
THREAD LENGTH0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEDOUBLE HEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
GRIP DIAMETER0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 7
PBF1253-3-16Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S11-1060-4-10Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VS3204-4-10Reference document
Same NSN cross-reference
Reference document — Secondary reference
ST3M453-3-16Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S353-4-10Reference document
Same NSN cross-reference
Reference document — Secondary reference
BM17019-3-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MB61-3-16?
MB61-3-16 is a BOLT,CLOSE TOLERANCE.
What parts can replace MB61-3-16?
There are 7 known substitutes for MB61-3-16: PBF1253-3-16, S11-1060-4-10, VS3204-4-10 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MB61-3-16?
MB61-3-16 is cataloged in the U.S. Government catalog under NSN 5306-01-133-2193. 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.