NAS1581F3T9X — SCREW,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

NAS1581F3T9X: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 8740 OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.2578 INCHES MINIMUM AND 0.3047 INCHES MAXIMUM IN, thread_length: 0.363 INCHES NOMINAL IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-398-1302, 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

NAS1581F3T9X

NSN: 5305-01-398-1302
FSC: 5305 — Screws
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)

SPECIFICATIONS

material	STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 8740 OVERALL
head_style	FLAT COUNTERSUNK
thread_class	3A A
head_diameter	0.2578 INCHES MINIMUM AND 0.3047 INCHES MAXIMUM IN
thread_length	0.363 INCHES NOMINAL IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
shoulder_length	0.509 INCHES MINIMUM AND 0.529 INCHES MAXIMUM FIRST SHOULDER IN
thread_direction	RIGHT-HAND
countersink_angle	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
shoulder_diameter	0.2041 INCHES MINIMUM AND 0.2051 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatment	CADMIUM AND CHROMATE OVERALL
NSN	5305-01-398-1302

COMPONENT DIAGRAM

KEY FEATURES

•

FASTENER LENGTH: 0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN

•

SHOULDER LENGTH: 0.509 INCHES MINIMUM AND 0.529 INCHES MAXIMUM FIRST SHOULDER IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

SHOULDER DIAMETER: 0.2041 INCHES MINIMUM AND 0.2051 INCHES MAXIMUM FIRST SHOULDER IN

•

THREAD LENGTH: 0.363 INCHES NOMINAL IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.190 INCHES IN

TECHNICAL CHARACTERISTICS

FASTENER LENGTH	0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
SHOULDER LENGTH	0.509 INCHES MINIMUM AND 0.529 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER	0.2041 INCHES MINIMUM AND 0.2051 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH	0.363 INCHES NOMINAL IN
SHOULDER SHAPE	ROUND FIRST SHOULDER
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.190 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND

OTHER ITEMS IN FSC 5305 — Screws

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831

SUBSTITUTES & CROSS-REFERENCES 1

NAS1581A3T9XReference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is NAS1581F3T9X?

NAS1581F3T9X is a SCREW,SHOULDER.

What parts can replace NAS1581F3T9X?

There is 1 known substitute for NAS1581F3T9X: NAS1581A3T9X. Substitute compatibility should be verified for your specific system.

What is the NSN for NAS1581F3T9X?

NAS1581F3T9X is cataloged in the U.S. Government catalog under NSN 5305-01-398-1302. This indicates validated use in U.S. government and defense supply chains.

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