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A51H40524-11 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

A51H40524-11: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include head_style: ROUND W/WRENCH FLATS, head_height: 0.156 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.800 INCHES NOMINAL IN, thread_length: 0.333 INCHES MINIMUM IN, fastener_length: 2.223 INCHES MINIMUM AND 2.233 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-003-3873, 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
A51H40524-11
NSN: 5306-00-003-3873
FSC: 5306 — Bolts
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
head_styleROUND W/WRENCH FLATS
head_height0.156 INCHES NOMINAL IN
thread_class3A A
head_diameter0.800 INCHES NOMINAL IN
thread_length0.333 INCHES MINIMUM IN
fastener_length2.223 INCHES MINIMUM AND 2.233 INCHES MAXIMUM IN
shoulder_length1.786 INCHES MINIMUM AND 1.796 INCHES MAXIMUM IN
shoulder_diameter0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM IN
width_between_flats0.678 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
concentric_hole_depth1.690 INCHES NOMINAL IN
nominal_thread_diameter0.375 INCHES IN
concentric_hole_diameter0.311 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
NSN5306-00-003-3873
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A51H40524-11 · 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: 0.156 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.223 INCHES MINIMUM AND 2.233 INCHES MAXIMUM IN
•
CONCENTRIC HOLE DEPTH: 1.690 INCHES NOMINAL IN
•
THREAD LENGTH: 0.333 INCHES MINIMUM IN
•
SHANK UNTHREADED HOLE DIAMETER: 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: ROUND W/WRENCH FLATS
•
WIDTH BETWEEN FLATS: 0.678 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.156 INCHES NOMINAL IN
FASTENER LENGTH2.223 INCHES MINIMUM AND 2.233 INCHES MAXIMUM IN
CONCENTRIC HOLE DEPTH1.690 INCHES NOMINAL IN
THREAD LENGTH0.333 INCHES MINIMUM IN
SHANK UNTHREADED HOLE DIAMETER0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEROUND W/WRENCH FLATS
WIDTH BETWEEN FLATS0.678 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
SHOULDER DIAMETER0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM IN
CONCENTRIC HOLE DIAMETER0.311 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-004-7044 5306-00-007-6129 5306-00-008-7899 5306-00-009-4739 5306-00-118-7332 5306-00-151-1777 5306-00-255-4507 5306-01-101-2459
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51H40524-11?
A51H40524-11 is a BOLT,INTERNALLY RELIEVED BODY.
What is the NSN for A51H40524-11?
A51H40524-11 is cataloged in the U.S. Government catalog under NSN 5306-00-003-3873. 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.