HT4020-3-4 — SCREW,CLOSE TOLERANCE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

HT4020-3-4: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: FLAT COUNTERSUNK UNDERCUT, grip_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, head_height: 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-135-4147, 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

HT4020-3-4

NSN: 5305-01-135-4147
FSC: 5305 — Screws
CAGE: 73197 — HI-SHEAR CORPORATION (USA)

SPECIFICATIONS

material	STEEL CORROSION RESISTING OVERALL
head_style	FLAT COUNTERSUNK UNDERCUT
grip_length	0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
head_height	0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
thread_class	3A A
grip_diameter	0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
head_diameter	0.377 INCHES MINIMUM AND 0.381 INCHES MAXIMUM IN
thread_length	0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
surface_finish	32.0 MICROINCHES THREADS
fastener_length	0.640 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
special_features	CETYL ALCOHOL LUBRICATNT
thread_direction	RIGHT-HAND
NSN	5305-01-135-4147

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE FINISH: 32.0 MICROINCHES THREADS

•

HEAD HEIGHT: 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN

•

FASTENER LENGTH: 0.640 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN

•

THREAD LENGTH: 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.190 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK UNDERCUT

TECHNICAL CHARACTERISTICS

SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE FINISH	32.0 MICROINCHES GRIP
HEAD HEIGHT	0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
FASTENER LENGTH	0.640 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
THREAD LENGTH	0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.190 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK UNDERCUT
THREAD DIRECTION	RIGHT-HAND
GRIP LENGTH	0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN

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 1

ST3M652C3-4DSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 HT4020-3-4?

HT4020-3-4 is a SCREW,CLOSE TOLERANCE.

What parts can replace HT4020-3-4?

There is 1 known substitute for HT4020-3-4: ST3M652C3-4D. Substitute compatibility should be verified for your specific system.

What is the NSN for HT4020-3-4?

HT4020-3-4 is cataloged in the U.S. Government catalog under NSN 5305-01-135-4147. This indicates validated use in U.S. government and defense supply chains.

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