6408559-4 — SCREW,MACHINE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

6408559-4: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: KNURLED NO. 1, head_height: 0.500 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.750 INCHES NOMINAL IN, thread_length: 0.400 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, screw_material: STEEL CORROSION RESISTING.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-421-2026, 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

6408559-4

NSN: 5305-01-421-2026
FSC: 5305 — Screws
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)

SPECIFICATIONS

head_style	KNURLED NO. 1
head_height	0.500 INCHES NOMINAL IN
thread_class	2A A
head_diameter	0.750 INCHES NOMINAL IN
thread_length	0.400 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
screw_material	STEEL CORROSION RESISTING
fastener_length	1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
internal_drive_style	SLOT
nominal_thread_diameter	0.250 INCHES IN
thread_quantity_per_inch	20
thread_series_designator	UNIFIED NATIONAL COARSE (UNC)
NSN	5305-01-421-2026

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.500 INCHES NOMINAL IN

•

FASTENER LENGTH: 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN

•

THREAD LENGTH: 0.400 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN

•

NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD STYLE: KNURLED NO. 1

•

THREAD DIRECTION: RIGHT-HAND

•

SCREW MATERIAL: STEEL CORROSION RESISTING

•

INTERNAL DRIVE STYLE: SLOT

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.500 INCHES NOMINAL IN
FASTENER LENGTH	1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
THREAD LENGTH	0.400 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	KNURLED NO. 1
THREAD DIRECTION	RIGHT-HAND
SCREW MATERIAL	STEEL CORROSION RESISTING
INTERNAL DRIVE STYLE	SLOT
THREAD CLASS	2A A
THREAD QUANTITY PER INCH	20

SUBSTITUTES & CROSS-REFERENCES 4

DF4058-0164P121Reference document

Same NSN cross-reference

Reference document — Secondary reference

438-6404482-481Reference document

Same NSN cross-reference

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

469-6408559-5Reference document

Same NSN cross-reference

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

211015955Reference document

Same NSN cross-reference

Reference document — Secondary reference

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 6408559-4?

6408559-4 is a SCREW,MACHINE.

What parts can replace 6408559-4?

There are 4 known substitutes for 6408559-4: DF4058-0164P121, 438-6404482-481, 469-6408559-5 and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 6408559-4?

6408559-4 is cataloged in the U.S. Government catalog under NSN 5305-01-421-2026. This indicates validated use in U.S. government and defense supply chains.

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6408559-4 — SCREW,MACHINE

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