ST3M557-7-12M — SCREW,CLOSE TOLERANCE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

ST3M557-7-12M: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, head_style: FILLISTER COUNTERSUNK, grip_length: 1.000 INCHES NOMINAL IN, head_height: 0.020 INCHES MAXIMUM IN, point_style: FLAT, point_length: 0.062 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-591-0195, 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

ST3M557-7-12M

NSN: 5305-01-591-0195
FSC: 5305 — Screws
CAGE: 0ZC92 — HEARTLAND PRECISION FASTENERS INC (USA)

SPECIFICATIONS

material	NICKEL ALLOY 718 OVERALL
head_style	FILLISTER COUNTERSUNK
grip_length	1.000 INCHES NOMINAL IN
head_height	0.020 INCHES MAXIMUM IN
point_style	FLAT
point_length	0.062 INCHES NOMINAL IN
thread_class	3A A
grip_diameter	0.437 INCHES NOMINAL IN
head_diameter	0.612 INCHES MINIMUM AND 0.672 INCHES MAXIMUM IN
thread_length	0.656 INCHES NOMINAL IN
fastener_length	1.641 INCHES MINIMUM AND 1.671 INCHES MAXIMUM IN
special_features	ITEM HAS A DRY FILM LUBE APPLIED TO THE SHANK AND THE THREADS ONLY WITH 100 PERCENT COVERAGE OF THREADS AND 80 TO 100 PERCENT COVERAGE OF THE SHANK LENGTH
NSN	5305-01-591-0195

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.020 INCHES MAXIMUM IN

•

POINT LENGTH: 0.062 INCHES NOMINAL IN

•

FASTENER LENGTH: 1.641 INCHES MINIMUM AND 1.671 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2700 ASSN STD SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.656 INCHES NOMINAL IN

•

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

•

POINT CHAMFER ANGLE: 45.0 DEGREES NOMINAL

•

NOMINAL THREAD DIAMETER: 0.438 INCHES IN

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.020 INCHES MAXIMUM IN
POINT LENGTH	0.062 INCHES NOMINAL IN
FASTENER LENGTH	1.641 INCHES MINIMUM AND 1.671 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS 2700 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.656 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
POINT CHAMFER ANGLE	45.0 DEGREES NOMINAL
NOMINAL THREAD DIAMETER	0.438 INCHES IN
HEAD STYLE	FILLISTER 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 2

HT4027-7-12MSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

11923-7-12MSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 ST3M557-7-12M?

ST3M557-7-12M is a SCREW,CLOSE TOLERANCE.

What parts can replace ST3M557-7-12M?

There are 2 known substitutes for ST3M557-7-12M: HT4027-7-12M, 11923-7-12M. Substitute compatibility should be verified for your specific system.

What is the NSN for ST3M557-7-12M?

ST3M557-7-12M is cataloged in the U.S. Government catalog under NSN 5305-01-591-0195. This indicates validated use in U.S. government and defense supply chains.

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