MS9557-12 — BOLT,MACHINE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

MS9557-12: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: DOUBLE HEXAGON EXTENDED WASHER, grip_length: 0.079 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN, head_height: 0.300 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.740 INCHES MINIMUM AND 0.806 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-274-8315, 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

MS9557-12

NSN: 5306-01-274-8315
FSC: 5306 — Bolts
CAGE: 99207 — GENERAL ELECTRIC COMPANY DBA GE AEROSPACE (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
head_style	DOUBLE HEXAGON EXTENDED WASHER
grip_length	0.079 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
head_height	0.300 INCHES NOMINAL IN
thread_class	3A A
thread_length	0.740 INCHES MINIMUM AND 0.806 INCHES MAXIMUM IN
surface_finish	32.0 MICROINCHES GRIP
fastener_length	0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
features_provided	FINISHED HEAD
width_between_flats	0.312 INCHES NOMINAL IN
nominal_thread_diameter	0.250 INCHES IN
NSN	5306-01-274-8315

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE FINISH: 32.0 MICROINCHES THREADS

•

EXTENDED WASHER THICKNESS: 0.060 INCHES NOMINAL IN

•

HEAD HEIGHT: 0.300 INCHES NOMINAL IN

•

FASTENER LENGTH: 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN

•

EXTENDED WASHER DIAMETER: 0.438 INCHES NOMINAL IN

•

THREAD LENGTH: 0.740 INCHES MINIMUM AND 0.806 INCHES MAXIMUM IN

TECHNICAL CHARACTERISTICS

SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
EXTENDED WASHER THICKNESS	0.060 INCHES NOMINAL IN
HEAD HEIGHT	0.300 INCHES NOMINAL IN
FASTENER LENGTH	0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
EXTENDED WASHER DIAMETER	0.438 INCHES NOMINAL IN
THREAD LENGTH	0.740 INCHES MINIMUM AND 0.806 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES IN

SUBSTITUTES & CROSS-REFERENCES 2

5306PL0626049Reference document

Same NSN cross-reference

Reference document — Informative reference only

J644P11EReference document

Same NSN cross-reference

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

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is MS9557-12?

MS9557-12 is a BOLT,MACHINE.

What parts can replace MS9557-12?

There are 2 known substitutes for MS9557-12: 5306PL0626049, J644P11E. Substitute compatibility should be verified for your specific system.

What is the NSN for MS9557-12?

MS9557-12 is cataloged in the U.S. Government catalog under NSN 5306-01-274-8315. This indicates validated use in U.S. government and defense supply chains.

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