ST3M653C6-8A — SCREW,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

ST3M653C6-8A: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.755 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, thread_length: 0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-240-0859, 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

ST3M653C6-8A

NSN: 5305-01-240-0859
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)

SPECIFICATIONS

material	STEEL CORROSION RESISTING OVERALL
head_style	FLAT COUNTERSUNK
thread_class	3A A
head_diameter	0.755 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
thread_length	0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	1.125 INCHES MINIMUM AND 1.172 INCHES MAXIMUM IN
shoulder_length	0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN
special_features	SUPPLY WITH O RING PER ST7M251
thread_direction	RIGHT-HAND
countersink_angle	99.5 DEGREES MINIMUM AND 100.5 DEGREES MAXIMUM
shoulder_diameter	0.3896 INCHES MINIMUM AND 0.3901 INCHES MAXIMUM FIRST SHOULDER IN
NSN	5305-01-240-0859

COMPONENT DIAGRAM

KEY FEATURES

•

FASTENER LENGTH: 1.125 INCHES MINIMUM AND 1.172 INCHES MAXIMUM IN

•

SHOULDER LENGTH: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN

•

SHOULDER DIAMETER: 0.3896 INCHES MINIMUM AND 0.3901 INCHES MAXIMUM FIRST SHOULDER IN

•

THREAD LENGTH: 0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

•

NOMINAL THREAD DIAMETER: 0.375 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

FASTENER LENGTH	1.125 INCHES MINIMUM AND 1.172 INCHES MAXIMUM IN
SHOULDER LENGTH	0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER	0.3896 INCHES MINIMUM AND 0.3901 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH	0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN
SHOULDER SHAPE	ROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER	0.375 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND
SPECIAL FEATURES	SUPPLY WITH O RING PER ST7M251
MINIMUM TENSILE STRENGTH	125000 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.

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

SUBSTITUTES & CROSS-REFERENCES 1

HT4020-6-8AXReference 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 ST3M653C6-8A?

ST3M653C6-8A is a SCREW,SHOULDER.

What parts can replace ST3M653C6-8A?

There is 1 known substitute for ST3M653C6-8A: HT4020-6-8AX. Substitute compatibility should be verified for your specific system.

What is the NSN for ST3M653C6-8A?

ST3M653C6-8A is cataloged in the U.S. Government catalog under NSN 5305-01-240-0859. This indicates validated use in U.S. government and defense supply chains.

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