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4443C139 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

4443C139: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, head_style: ROUND W/WRENCH FLATS, thread_class: 3A A, head_diameter: 0.650 INCHES NOMINAL IN, thread_length: 1.150 INCHES NOMINAL IN, fastener_length: 3.935 INCHES MINIMUM AND 3.945 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-184-7630, 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
4443C139
NSN: 5306-01-184-7630
FSC: 5306 — Bolts
CAGE: U1605 — HONEYWELL AEROSPACE YEOVIL DIV AEROSPACE -YEOVIL (GBR)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
head_styleROUND W/WRENCH FLATS
thread_class3A A
head_diameter0.650 INCHES NOMINAL IN
thread_length1.150 INCHES NOMINAL IN
fastener_length3.935 INCHES MINIMUM AND 3.945 INCHES MAXIMUM IN
shoulder_length2.350 INCHES NOMINAL IN
special_featuresKEYWAY MACHINED IN THREAD END 0.980 IN. LONG 0.291 IN. DEEP; THREADS 7/16-20UNF-2A IN SHANK 0.500 IN. FROM BEARING SURFACE OF HEAD A
style_designatorCONCENTRIC HOLE UNTHREADED
thread_directionRIGHT-HAND
shoulder_diameter0.364 INCHES MINIMUM AND 0.366 INCHES MAXIMUM IN
width_between_flats0.554 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
NSN5306-01-184-7630
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4443C139 · 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
•
FASTENER LENGTH: 3.935 INCHES MINIMUM AND 3.945 INCHES MAXIMUM IN
•
CONCENTRIC HOLE DEPTH: 2.400 INCHES NOMINAL IN
•
THREAD LENGTH: 1.150 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CONCENTRIC HOLE UNTHREADED
•
MATERIAL DOCUMENT AND CLASSIFICATION: SPEC S1474 HE30-TF FSCM U1605 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
HEAD STYLE: ROUND W/WRENCH FLATS
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.554 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FASTENER LENGTH3.935 INCHES MINIMUM AND 3.945 INCHES MAXIMUM IN
CONCENTRIC HOLE DEPTH2.400 INCHES NOMINAL IN
THREAD LENGTH1.150 INCHES NOMINAL IN
STYLE DESIGNATORCONCENTRIC HOLE UNTHREADED
MATERIAL DOCUMENT AND CLASSIFICATIONSPEC S1474 HE30-TF FSCM U1605 MFR REF SINGLE MATERIAL RESPONSE OVERALL
HEAD STYLEROUND W/WRENCH FLATS
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.554 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
SHOULDER DIAMETER0.364 INCHES MINIMUM AND 0.366 INCHES MAXIMUM IN
CONCENTRIC HOLE DIAMETER0.250 INCHES MINIMUM AND 0.252 INCHES MAXIMUM 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

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 4443C139?
4443C139 is a BOLT,INTERNALLY RELIEVED BODY.
What is the NSN for 4443C139?
4443C139 is cataloged in the U.S. Government catalog under NSN 5306-01-184-7630. 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.