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2578824-001A — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2578824-001A: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include head_height: 0.140 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 1.000 INCHES NOMINAL IN, thread_length: 0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN, fastener_length: 4.820 INCHES NOMINAL IN, counterbore_depth: 0.040 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-495-3046, 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
2578824-001A
NSN: 5306-00-495-3046
FSC: 5306 — Bolts
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
head_height0.140 INCHES NOMINAL IN
thread_class3A A
head_diameter1.000 INCHES NOMINAL IN
thread_length0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
fastener_length4.820 INCHES NOMINAL IN
counterbore_depth0.040 INCHES NOMINAL IN
counterbore_diameter0.160 INCHES NOMINAL IN
shank_unthreaded_hole_diameter0.109 INCHES NOMINAL FIRST HOLE IN
distance_from_centerline_to_flat0.425 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
distance_from_head_largest_bearing_surface_to_shank_hole_center4.695 INCHES NOMINAL FIRST HOLE IN
NSN5306-00-495-3046
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2578824-001A · 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: 0.140 INCHES NOMINAL IN
•
FASTENER LENGTH: 4.820 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO FLAT: 0.425 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
•
SHANK UNTHREADED HOLE DIAMETER: 0.109 INCHES NOMINAL FIRST HOLE IN
•
COUNTERBORE DEPTH: 0.040 INCHES NOMINAL IN
•
COUNTERBORE DIAMETER: 0.160 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.140 INCHES NOMINAL IN
FASTENER LENGTH4.820 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO FLAT0.425 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
THREAD LENGTH0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
SHANK UNTHREADED HOLE DIAMETER0.109 INCHES NOMINAL FIRST HOLE IN
COUNTERBORE DEPTH0.040 INCHES NOMINAL IN
COUNTERBORE DIAMETER0.160 INCHES NOMINAL IN
THREAD CLASS3A A
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER4.695 INCHES NOMINAL FIRST HOLE IN
HEAD DIAMETER1.000 INCHES NOMINAL 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 — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2578824-001A?
2578824-001A is a BOLT,INTERNALLY RELIEVED BODY.
What is the NSN for 2578824-001A?
2578824-001A is cataloged in the U.S. Government catalog under NSN 5306-00-495-3046. 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.