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MB88-7D39 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MB88-7D39: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, head_style: DOUBLE HEXAGON, head_height: 0.247 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.573 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-142-7176, 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
MB88-7D39
NSN: 5306-01-142-7176
FSC: 5306 — Bolts
CAGE: L4528 — LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC (CAN)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
head_styleDOUBLE HEXAGON
head_height0.247 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
thread_class3A A
thread_length0.573 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length3.021 INCHES MINIMUM AND 3.068 INCHES MAXIMUM IN
shoulder_length2.428 INCHES MINIMUM AND 2.448 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.4521 INCHES MINIMUM AND 0.4526 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentPASSIVATE OVERALL
width_between_flats0.690 INCHES MAXIMUM IN
NSN5306-01-142-7176
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MB88-7D39 · 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: 0.247 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.021 INCHES MINIMUM AND 3.068 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 2.428 INCHES MINIMUM AND 2.448 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.4521 INCHES MINIMUM AND 0.4526 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.573 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
SHANK UNTHREADED HOLE DIAMETER: 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.247 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
FASTENER LENGTH3.021 INCHES MINIMUM AND 3.068 INCHES MAXIMUM IN
SHOULDER LENGTH2.428 INCHES MINIMUM AND 2.448 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.4521 INCHES MINIMUM AND 0.4526 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.573 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
SHANK UNTHREADED HOLE DIAMETER0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.438 INCHES 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 7
VS3037-7D39Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
HP5497-7D39Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S11-1061-7D39Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ST3M497-7D39Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VAL23607-7D39Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
109450-7D39Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 MB88-7D39?
MB88-7D39 is a BOLT,SHOULDER.
What parts can replace MB88-7D39?
There are 7 known substitutes for MB88-7D39: VS3037-7D39, HP5497-7D39, S11-1061-7D39 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MB88-7D39?
MB88-7D39 is cataloged in the U.S. Government catalog under NSN 5306-01-142-7176. 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.