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MILB6812 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MILB6812: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include hole_type: DRILLED, head_style: HEXAGON, grip_length: 3.484 INCHES MINIMUM AND 3.576 INCHES MAXIMUM IN, head_height: 0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.9975 INCHES MINIMUM AND 0.9985 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-063-3268, 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
MILB6812
NSN: 5306-00-063-3268
NIINs: 000633268, 001443646, 001444058, 001509097, 001509233, 001509866, 001509867, 001509868, 001510656, 001510709, 001511084, 001512513, 001512603, 001512626, 001512708, 001512982, 001513028, 001513196, 001562328, 001744117, 001800106, 001800209, 001801465, 001801919, 001801926, 001801936, 001801949, 001802669, 001802711, 001821348, 001821349, 002062336, 002064931, 002066270, 002073334, 002074581, 002074585, 002079535, 002083635, 002083650, 002083653, 002083667, 002083669, 002085062, 002089332, 002759544, 002759561, 002861338, 005590216, 006161248, 006557447, 006560062, 006560358, 006804988, 006825530, 006825602, 006849781, 006852634, 006853269, 006856933, 006857258, 006878171, 006881814, 007029440, 007029442, 007150566, 007151308, 007207666, 007207667, 007207669, 007207818, 007208486, 007208747, 007208748, 007213391, 007214469, 007215856, 007215898, 007218158, 007221860, 007221862, 007221866, 007226126, 007226127, 007226131, 007228680, 007228684, 007228685, 007228757, 007228758, 007228768, 007228780, 007228786, 007234807, 007234809, 007235396, 007251357, 007251358, 007252585, 007256614, 007273131, 007273467, 007276788, 007541785, 007541787, 007541788, 007541789, 007541792, 008025368, 008025371, 008028649, 008039982, 008053559, 008119219, 008148786, 010930709, 013620706, 013719364, 013749812, 013757125, 013779421, 013812191, 013886942, 013963926, 013965296, 014088478, 014296595, 014689825, 014783808
FSC: 5306 — Bolts
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
hole_typeDRILLED
head_styleHEXAGON
grip_length3.484 INCHES MINIMUM AND 3.576 INCHES MAXIMUM IN
head_height0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.9975 INCHES MINIMUM AND 0.9985 INCHES MAXIMUM IN
hole_diameter0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
hole_quantity3
thread_length0.797 INCHES NOMINAL IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length4.031 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
NSN5306-00-063-3268
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MILB6812 · 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: 0.453 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.796 INCHES MINIMUM AND 1.843 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.968 INCHES MINIMUM IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
HOLE CONFIGURATION STYLE: HEXAGON LONGITUDINAL HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.453 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN
FASTENER LENGTH1.796 INCHES MINIMUM AND 1.843 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.968 INCHES MINIMUM IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
HOLE CONFIGURATION STYLEHEXAGON LONGITUDINAL HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.625 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
SUBSTITUTES & CROSS-REFERENCES 1
MS20074-10-16Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MILB6812?
MILB6812 is a BOLT,MACHINE.
What parts can replace MILB6812?
There is 1 known substitute for MILB6812: MS20074-10-16. Substitute compatibility should be verified for your specific system.
What is the NSN for MILB6812?
MILB6812 is cataloged in the U.S. Government catalog under NSN 5306-00-063-3268. This indicates validated use in U.S. government and defense supply chains.
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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.