ST3M557-9D45 — SCREW,CLOSE TOLERANCE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

ST3M557-9D45: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, hole_type: DRILLED, head_style: FLAT COUNTERSUNK, grip_length: 2.8025 INCHES MINIMUM AND 2.8225 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.5610 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-507-4373, 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

ST3M557-9D45

NSN: 5305-01-507-4373
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)

SPECIFICATIONS

material	NICKEL ALLOY 718 OVERALL
hole_type	DRILLED
head_style	FLAT COUNTERSUNK
grip_length	2.8025 INCHES MINIMUM AND 2.8225 INCHES MAXIMUM IN
thread_class	3A A
grip_diameter	0.5610 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN
head_diameter	0.838 INCHES NOMINAL IN
hole_diameter	0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN
hole_quantity	1
thread_length	0.906 INCHES NOMINAL IN
fastener_length	3.7035 INCHES MINIMUM AND 3.7335 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
NSN	5305-01-507-4373

COMPONENT DIAGRAM

KEY FEATURES

•

FASTENER LENGTH: 3.7035 INCHES MINIMUM AND 3.7335 INCHES MAXIMUM IN

•

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

•

THREAD LENGTH: 0.906 INCHES NOMINAL IN

•

HOLE CONFIGURATION STYLE: ROUND

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.5625 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

FASTENER LENGTH	3.7035 INCHES MINIMUM AND 3.7335 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.906 INCHES NOMINAL IN
HOLE CONFIGURATION STYLE	ROUND
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.5625 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND
GRIP LENGTH	2.8025 INCHES MINIMUM AND 2.8225 INCHES MAXIMUM IN
GRIP DIAMETER	0.5610 INCHES MINIMUM AND 0.5615 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

HT4027-9D45Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

ST3M557Reference document

Same NSN cross-reference

Reference document — Drawing number reference only

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 ST3M557-9D45?

ST3M557-9D45 is a SCREW,CLOSE TOLERANCE.

What parts can replace ST3M557-9D45?

There are 2 known substitutes for ST3M557-9D45: HT4027-9D45, ST3M557. Substitute compatibility should be verified for your specific system.

What is the NSN for ST3M557-9D45?

ST3M557-9D45 is cataloged in the U.S. Government catalog under NSN 5305-01-507-4373. This indicates validated use in U.S. government and defense supply chains.

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