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2149664 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2149664: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, head_style: HEXAGON, head_height: 0.600 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 1.188 INCHES NOMINAL IN, thread_series: UNIFIED NATIONAL COARSE (UNC) COUNTERBORE. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-318-5232, 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
2149664
NSN: 5306-01-318-5232
FSC: 5306 — Bolts
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
head_styleHEXAGON
head_height0.600 INCHES NOMINAL IN
thread_class3A A
thread_length1.188 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC) COUNTERBORE
fastener_length3.281 INCHES NOMINAL IN
hardness_rating35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length2.083 INCHES MINIMUM AND 2.093 INCHES MAXIMUM IN
style_designatorCONCENTRIC HOLE THREADED
thread_directionRIGHT-HAND
threads_per_inch18 COUNTERBORE
NSN5306-01-318-5232
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2149664 · 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: 0.600 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.281 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC) COUNTERBORE
•
INTERNAL THREAD DIRECTION: RIGHT-HAND COUNTERBORE
•
THREAD LENGTH: 1.188 INCHES NOMINAL IN
•
HARDNESS RATING: 35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
•
THREADS PER INCH: 18 COUNTERBORE
•
STYLE DESIGNATOR: CONCENTRIC HOLE THREADED
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.600 INCHES NOMINAL IN
FASTENER LENGTH3.281 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC) COUNTERBORE
INTERNAL THREAD DIRECTIONRIGHT-HAND COUNTERBORE
THREAD LENGTH1.188 INCHES NOMINAL IN
HARDNESS RATING35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
THREADS PER INCH18 COUNTERBORE
STYLE DESIGNATORCONCENTRIC HOLE THREADED
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.625 INCHES IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 1
5306PL0916130Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 2149664?
2149664 is a BOLT,INTERNALLY RELIEVED BODY.
What parts can replace 2149664?
There is 1 known substitute for 2149664: 5306PL0916130. Substitute compatibility should be verified for your specific system.
What is the NSN for 2149664?
2149664 is cataloged in the U.S. Government catalog under NSN 5306-01-318-5232. 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.