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6511858 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

6511858: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.917 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN, fastener_length: 1.000 INCHES NOMINAL IN, hardness_rating: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-246-8434, 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
6511858
NSN: 5306-01-246-8434
FSC: 5306 — Bolts
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
thread_class2A A
thread_length0.917 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
fastener_length1.000 INCHES NOMINAL IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentZINC OVERALL
width_between_flats0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
nominal_thread_diameter0.375 INCHES IN
minimum_tensile_strength150000 POUNDS PER SQUARE INCH LBS
NSN5306-01-246-8434
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6511858 · 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: 0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.000 INCHES NOMINAL IN
•
THREAD LENGTH: 0.917 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE GRADE 8 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
FASTENER LENGTH1.000 INCHES NOMINAL IN
THREAD LENGTH0.917 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GRADE 8 ASSN STD ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 4
113-5562784 ITEM 30Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
113-5562784 ITEReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MIL-S-1222Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-DTL-1222Reference document
Same NSN cross-reference
Reference document — Identification 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 6511858?
6511858 is a BOLT,MACHINE.
What parts can replace 6511858?
There are 4 known substitutes for 6511858: 113-5562784 ITEM 30, 113-5562784 ITE, MIL-S-1222 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6511858?
6511858 is cataloged in the U.S. Government catalog under NSN 5306-01-246-8434. 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.