CHT4020-4-7A — SCREW,CLOSE TOLERANCE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

CHT4020-4-7A: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, head_style: FLAT COUNTERSUNK UNDERCUT, grip_length: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN, head_height: 0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-028-2471, 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

CHT4020-4-7A

NSN: 5305-01-028-2471
FSC: 5305 — Screws
CAGE: 80539 — SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA (USA)

SPECIFICATIONS

material	STEEL COMP XM-13 OVERALL
head_style	FLAT COUNTERSUNK UNDERCUT
grip_length	0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
head_height	0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
thread_class	3A A
grip_diameter	0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
head_diameter	0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length	0.442 INCHES MINIMUM AND 0.509 INCHES MAXIMUM IN
surface_finish	32.0 MICROINCHES GRIP
fastener_length	0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
special_features	FURNISHED WITH ONE O-RING
thread_direction	RIGHT-HAND
NSN	5305-01-028-2471

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE FINISH: 32.0 MICROINCHES THREADS

•

HEAD HEIGHT: 0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN

•

FASTENER LENGTH: 0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN

•

THREAD LENGTH: 0.442 INCHES MINIMUM AND 0.509 INCHES MAXIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK UNDERCUT

TECHNICAL CHARACTERISTICS

SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE FINISH	32.0 MICROINCHES GRIP
HEAD HEIGHT	0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
FASTENER LENGTH	0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
THREAD LENGTH	0.442 INCHES MINIMUM AND 0.509 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK UNDERCUT
THREAD DIRECTION	RIGHT-HAND
GRIP LENGTH	0.428 INCHES MINIMUM AND 0.448 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 2

HT4020-4-7AReference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

ST3M652C4-7ASame 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 CHT4020-4-7A?

CHT4020-4-7A is a SCREW,CLOSE TOLERANCE.

What parts can replace CHT4020-4-7A?

There are 2 known substitutes for CHT4020-4-7A: HT4020-4-7A, ST3M652C4-7A. Substitute compatibility should be verified for your specific system.

What is the NSN for CHT4020-4-7A?

CHT4020-4-7A is cataloged in the U.S. Government catalog under NSN 5305-01-028-2471. This indicates validated use in U.S. government and defense supply chains.

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