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Technical Data Sheet
PartsTable / COMPONENT / 5306AC1-021
5306AC1-021 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: ROUND W/WRENCH FLATS, head_height: 0.190 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.812 INCHES NOMINAL IN, thread_length: 0.405 INCHES MINIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-475-9607, 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
5306AC1-021
NSN: 5306-00-475-9607
FSC: 5306
CAGE: 81996 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleROUND W/WRENCH FLATS
head_height0.190 INCHES NOMINAL IN
thread_class3A A
head_diameter0.812 INCHES NOMINAL IN
thread_length0.405 INCHES MINIMUM IN
fastener_length6.250 INCHES NOMINAL IN
shoulder_length5.593 INCHES NOMINAL IN
special_featuresCONCENTRIC HOLE ZINC SURFACE TREATMENT
style_designatorCONCENTRIC HOLE UNTHREADED
thread_directionRIGHT-HAND
shoulder_diameter0.625 INCHES NOMINAL IN
NSN5306-00-475-9607
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5306AC1-021 · 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
•
THREAD CLASS: 3A A
•
HEAD DIAMETER: 0.812 INCHES NOMINAL IN
•
CONCENTRIC HOLE DEPTH: 5.437 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNF
•
HEAD HEIGHT: 0.190 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM HEAD
•
SHOULDER DIAMETER: 0.625 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A A
HEAD DIAMETER0.812 INCHES NOMINAL IN
CONCENTRIC HOLE DEPTH5.437 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNF
HEAD HEIGHT0.190 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM HEAD
SHOULDER DIAMETER0.625 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
STYLE DESIGNATORCONCENTRIC HOLE UNTHREADED
SHOULDER LENGTH5.593 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
M5510-5Upgraded Successor
successor cross-reference
successor
5510-5Upgraded Successor
successor cross-reference
successor
55101Interchangeable
interchangeable cross-reference
interchangeable
55101/707569Interchangeable
interchangeable cross-reference
interchangeable
5510Interchangeable
interchangeable cross-reference
interchangeable
BSH2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5306AC1-021?
5306AC1-021 is a BOLT,INTERNALLY RELIEVED BODY.
What parts can replace 5306AC1-021?
There are 24 known substitutes for 5306AC1-021: M5510-5, 5510-5, 55101 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5306AC1-021?
5306AC1-021 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-475-9607. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026