WC4020-3-4A — SCREW,CLOSE TOLERANCE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

WC4020-3-4A: 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, grip_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN, head_diameter: 0.3765 INCHES MINIMUM AND 0.3813 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-338-7306, 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

WC4020-3-4A

NSN: 5305-01-338-7306
FSC: 5305 — Screws
CAGE: 60516 — WEST COAST AEROSPACE, INC. (USA)

SPECIFICATIONS

material	STEEL CORROSION RESISTING OVERALL
head_style	FLAT COUNTERSUNK
grip_length	0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
thread_class	3A A
grip_diameter	0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
head_diameter	0.3765 INCHES MINIMUM AND 0.3813 INCHES MAXIMUM IN
thread_length	0.130 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
surface_finish	32.0 MICROINCHES GRIP
fastener_length	0.390 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
countersink_angle	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
features_provided	CETYL ALCOHOL LUBRICANT AND O RING
NSN	5305-01-338-7306

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE FINISH: 32.0 MICROINCHES THREADS

•

FASTENER LENGTH: 0.390 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.130 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: 23-112,TY C CAGEC 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.190 INCHES IN

TECHNICAL CHARACTERISTICS

SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
FASTENER LENGTH	0.390 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.130 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	23-112,TY C CAGEC 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.190 INCHES IN
FEATURES PROVIDED	CETYL ALCOHOL LUBRICANT AND O RING
HEAD STYLE	FLAT COUNTERSUNK

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 3

CHT4020-3-4AReference document

Same NSN cross-reference

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

HT4020-3-4ASame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

ST3M652C3-4ASame 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 WC4020-3-4A?

WC4020-3-4A is a SCREW,CLOSE TOLERANCE.

What parts can replace WC4020-3-4A?

There are 3 known substitutes for WC4020-3-4A: CHT4020-3-4A, HT4020-3-4A, ST3M652C3-4A. Substitute compatibility should be verified for your specific system.

What is the NSN for WC4020-3-4A?

WC4020-3-4A is cataloged in the U.S. Government catalog under NSN 5305-01-338-7306. This indicates validated use in U.S. government and defense supply chains.

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WC4020-3-4A — SCREW,CLOSE TOLERANCE

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