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309492 — BOLT,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

309492: BOLT,EXTERNALLY RELIEVED BODY.

The BOLT,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.475 INCHES NOMINAL IN, fastener_length: 2.126 INCHES MINIMUM AND 2.188 INCHES MAXIMUM IN, width_between_flats: 0.562 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-121-8071, 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
309492
NSN: 5306-00-121-8071
FSC: 5306 — Bolts
CAGE: 1UVT5 — BRP US INC (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
thread_class2A A
thread_length0.475 INCHES NOMINAL IN
fastener_length2.126 INCHES MINIMUM AND 2.188 INCHES MAXIMUM IN
width_between_flats0.562 INCHES NOMINAL IN
first_diameter_from_head0.369 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
second_diameter_from_head0.225 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
distance_from_largest_bearing_surface_of_head_to_end_of_first_diameter1.688 INCHES NOMINAL IN
distance_from_largest_bearing_surface_of_head_to_end_of_second_diameter1.713 INCHES NOMINAL IN
NSN5306-00-121-8071
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 309492 · 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 0.243 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.126 INCHES MINIMUM AND 2.188 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.475 INCHES NOMINAL IN
•
FIRST DIAMETER FROM HEAD: 0.369 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 1.713 INCHES NOMINAL IN
•
HEAD STYLE: HEXAGON
•
SECOND DIAMETER FROM HEAD: 0.225 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.562 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
FASTENER LENGTH2.126 INCHES MINIMUM AND 2.188 INCHES MAXIMUM IN
THREAD LENGTH0.475 INCHES NOMINAL IN
FIRST DIAMETER FROM HEAD0.369 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER1.713 INCHES NOMINAL IN
HEAD STYLEHEXAGON
SECOND DIAMETER FROM HEAD0.225 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.562 INCHES NOMINAL IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER1.688 INCHES NOMINAL IN
THREAD CLASS2A A
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 309492?
309492 is a BOLT,EXTERNALLY RELIEVED BODY.
What is the NSN for 309492?
309492 is cataloged in the U.S. Government catalog under NSN 5306-00-121-8071. 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.