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CHT4020-3-5 — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

CHT4020-3-5: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: OVAL COUNTERSUNK, grip_length: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN, head_diameter: 0.376 INCHES MINIMUM AND 0.381 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-030-4902, 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
CHT4020-3-5
NSN: 5305-01-030-4902
FSC: 5305 — Screws
CAGE: 80539 — SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleOVAL COUNTERSUNK
grip_length0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
head_diameter0.376 INCHES MINIMUM AND 0.381 INCHES MAXIMUM IN
thread_length0.381 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
fastener_length0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
special_featuresCETYL ALCOHOL LUBRICATION
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
surface_treatmentPASSIVATE OVERALL
NSN5305-01-030-4902
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: CHT4020-3-5 · 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: 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.381 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: OVAL COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
GRIP DIAMETER: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
THREAD LENGTH0.381 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEOVAL COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
GRIP DIAMETER0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
SPECIAL FEATURESCETYL ALCOHOL LUBRICATION
SURFACE TREATMENTPASSIVATE OVERALL
INTERNAL DRIVE STYLEHIGH-TORQUE
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 2
ST3M652C3-5DSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
HT4020-3-5Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is CHT4020-3-5?
CHT4020-3-5 is a SCREW,CLOSE TOLERANCE.
What parts can replace CHT4020-3-5?
There are 2 known substitutes for CHT4020-3-5: ST3M652C3-5D, HT4020-3-5. Substitute compatibility should be verified for your specific system.
What is the NSN for CHT4020-3-5?
CHT4020-3-5 is cataloged in the U.S. Government catalog under NSN 5305-01-030-4902. 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.