3M218-4-17 — SCREW,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

3M218-4-17: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN, thread_length: 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-227-1265, 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

3M218-4-17

NSN: 5305-00-227-1265
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
head_style	FLAT COUNTERSUNK
thread_class	3A A
head_diameter	0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length	0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	1.515 INCHES MINIMUM AND 1.562 INCHES MAXIMUM IN
hardness_rating	24.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length	0.957 INCHES MINIMUM AND 0.979 INCHES MAXIMUM FIRST SHOULDER IN
thread_direction	RIGHT-HAND
countersink_angle	100.0 DEGREES NOMINAL
shoulder_diameter	0.280 INCHES MINIMUM AND 0.281 INCHES MAXIMUM FIRST SHOULDER IN
NSN	5305-00-227-1265

COMPONENT DIAGRAM

KEY FEATURES

•

FASTENER LENGTH: 1.515 INCHES MINIMUM AND 1.562 INCHES MAXIMUM IN

•

SHOULDER LENGTH: 0.957 INCHES MINIMUM AND 0.979 INCHES MAXIMUM FIRST SHOULDER IN

•

SHOULDER DIAMETER: 0.280 INCHES MINIMUM AND 0.281 INCHES MAXIMUM FIRST SHOULDER IN

•

THREAD LENGTH: 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

•

HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL

•

NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK

TECHNICAL CHARACTERISTICS

FASTENER LENGTH	1.515 INCHES MINIMUM AND 1.562 INCHES MAXIMUM IN
SHOULDER LENGTH	0.957 INCHES MINIMUM AND 0.979 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER	0.280 INCHES MINIMUM AND 0.281 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH	0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
SHOULDER SHAPE	ROUND FIRST SHOULDER
HARDNESS RATING	24.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND
INTERNAL DRIVE STYLE	OFFSET CRUCIFORM (TORQUE SET)

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 3

55979-4-17Reference document

Same NSN cross-reference

Reference document — Secondary reference

HT1030-4-17Reference document

Same NSN cross-reference

Reference document — Secondary reference

HT42N17Same 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 3M218-4-17?

3M218-4-17 is a SCREW,SHOULDER.

What parts can replace 3M218-4-17?

There are 3 known substitutes for 3M218-4-17: 55979-4-17, HT1030-4-17, HT42N17. Substitute compatibility should be verified for your specific system.

What is the NSN for 3M218-4-17?

3M218-4-17 is cataloged in the U.S. Government catalog under NSN 5305-00-227-1265. This indicates validated use in U.S. government and defense supply chains.

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