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554-4494-001 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

554-4494-001: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_height: 0.250 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.312 INCHES NOMINAL IN, thread_length: 1.250 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN, thread_series: UNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-103-6914, 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
554-4494-001
NSN: 5306-00-103-6914
FSC: 5306 — Bolts
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_height0.250 INCHES NOMINAL IN
thread_class2A A
head_diameter0.312 INCHES NOMINAL IN
thread_length1.250 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
thread_seriesUNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE
fastener_length1.90625 INCHES NOMINAL IN
style_designatorCOUNTERBORE THREADED
thread_directionRIGHT-HAND
threads_per_inch32 CONCENTRIC HOLE
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.0315 INCHES CONCENTRIC HOLE IN
NSN5306-00-103-6914
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 554-4494-001 · 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: 0.250 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.90625 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE
•
CONCENTRIC HOLE DEPTH: 1.34375 INCHES MINIMUM AND 1.40625 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.250 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
•
THREADS PER INCH: 32 CONCENTRIC HOLE
•
STYLE DESIGNATOR: COUNTERBORE THREADED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.250 INCHES NOMINAL IN
FASTENER LENGTH1.90625 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE
CONCENTRIC HOLE DEPTH1.34375 INCHES MINIMUM AND 1.40625 INCHES MAXIMUM IN
THREAD LENGTH1.250 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
THREADS PER INCH32 CONCENTRIC HOLE
STYLE DESIGNATORCOUNTERBORE THREADED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD DIRECTIONRIGHT-HAND
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

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 554-4494-001?
554-4494-001 is a BOLT,INTERNALLY RELIEVED BODY.
What is the NSN for 554-4494-001?
554-4494-001 is cataloged in the U.S. Government catalog under NSN 5306-00-103-6914. 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.