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MILB7838 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MILB7838: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL COMP E4340 OR STEEL COMP 8740 OVERALL, hole_type: DRILLED, head_style: DISHED HEXAGON, grip_length: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN, head_height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN, thread_class: 3A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-531-9513, 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
MILB7838
NSN: 5306-00-531-9513
NIINs: 005319513, 005509144, 005509145, 005509146, 005760845, 005762765, 005795437, 006389424, 006560120, 006602447, 006805841, 006805842, 006807132, 006807501, 006825727, 006873278, 007207955, 007213061, 007215685, 007233463, 007270786, 007273473, 008028190, 008032470, 008038471, 008039607, 008040918, 008040924, 008052986, 008053504, 008185333, 009436726, 011757573, 012012237, 013235428, 013620710
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 E4340 OR STEEL COMP 8740 OVERALL
hole_typeDRILLED
head_styleDISHED HEXAGON
grip_length0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
head_height0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.2445 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN
head_diameter0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
hole_diameter0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN
hole_quantity3
thread_length0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES GRIP
NSN5306-00-531-9513
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MILB7838 · 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
•
WIDTH ACROSS FLATS: 0.500 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.625 INCHES NOMINAL IN
•
FASTENER LENGTH: 7.609 INCHES MINIMUM AND 7.639 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.912 INCHES MINIMUM AND 0.962 INCHES MAXIMUM IN
•
HARDNESS RATING: 34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
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HOLE CONFIGURATION STYLE: ROUND
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MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.500 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
HEAD HEIGHT0.625 INCHES NOMINAL IN
FASTENER LENGTH7.609 INCHES MINIMUM AND 7.639 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.912 INCHES MINIMUM AND 0.962 INCHES MAXIMUM IN
HARDNESS RATING34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
HOLE CONFIGURATION STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.625 INCHES IN
HEAD STYLEBEVEL-CONICAL
SUBSTITUTES & CROSS-REFERENCES 2
MS20010H107Reference document
Same NSN cross-reference
Reference document — Secondary reference
NASM7838Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 MILB7838?
MILB7838 is a BOLT,INTERNAL WRENCHING.
What parts can replace MILB7838?
There are 2 known substitutes for MILB7838: MS20010H107, NASM7838. Substitute compatibility should be verified for your specific system.
What is the NSN for MILB7838?
MILB7838 is cataloged in the U.S. Government catalog under NSN 5306-00-531-9513. 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.