NAS1221-4E5 — SCREW,MACHINE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

NAS1221-4E5: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.461 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN, thread_length: 0.401 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN, screw_material: IRON ALLOY 660, fastener_length: 0.723 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-031-3684, 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

NAS1221-4E5

NSN: 5305-01-031-3684
FSC: 5305 — Screws
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)

SPECIFICATIONS

head_style	FLAT COUNTERSUNK
thread_class	3A A
head_diameter	0.461 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length	0.401 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN
screw_material	IRON ALLOY 660
fastener_length	0.723 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
countersink_angle	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
internal_drive_style	CROSS RECESS TYPE 1
nominal_thread_diameter	0.250 INCHES IN
screw_surface_treatment	PASSIVATE
minimum_tensile_strength	160000 POUNDS PER SQUARE INCH LBS
NSN	5305-01-031-3684

COMPONENT DIAGRAM

KEY FEATURES

•

SCREW SURFACE TREATMENT: PASSIVATE

•

FASTENER LENGTH: 0.723 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN

•

SCREW MATERIAL DOCUMENT AND CLASSIFICATION: AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE

•

THREAD LENGTH: 0.401 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN

•

NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK

•

THREAD DIRECTION: RIGHT-HAND

•

SPECIFICATION/STANDARD DATA: 80205-NAS1221 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD

TECHNICAL CHARACTERISTICS

SCREW SURFACE TREATMENT	PASSIVATE
FASTENER LENGTH	0.723 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATION	AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE
THREAD LENGTH	0.401 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND
SPECIFICATION/STANDARD DATA	80205-NAS1221 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SCREW MATERIAL	IRON ALLOY 660
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH LBS

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

No substitute or cross-reference records for this part.

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 NAS1221-4E5?

NAS1221-4E5 is a SCREW,MACHINE.

What is the NSN for NAS1221-4E5?

NAS1221-4E5 is cataloged in the U.S. Government catalog under NSN 5305-01-031-3684. This indicates validated use in U.S. government and defense supply chains.

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