BM21010-3-4 — SCREW,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

BM21010-3-4: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: ROOF, head_height: 0.145 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN, thread_length: 0.190 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-477-4130, 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

BM21010-3-4

NSN: 5305-01-477-4130
FSC: 5305 — Screws
CAGE: 17446 — HUCK INTERNATIONAL, INC (USA)

SPECIFICATIONS

material	STEEL OVERALL
head_style	ROOF
head_height	0.145 INCHES MAXIMUM IN
thread_class	3A A
head_diameter	0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
thread_length	0.190 INCHES NOMINAL IN
shoulder_shape	ROUND OVERALL
fastener_length	0.553 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM OVERALL
internal_drive_style	CROSS RECESS TYPE III
end_item_identification	E2C HAWKEYE AIRCRAFT
NSN	5305-01-477-4130

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.145 INCHES MAXIMUM IN

•

FASTENER LENGTH: 0.553 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TYPE 11,CLASS 2 FED SPEC 1ST TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.190 INCHES NOMINAL IN

•

SHOULDER SHAPE: ROUND OVERALL

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7839 MIL SPEC ALL MATERIAL RESPONSES OR MIL-S-6049 MIL SPEC ALL MATERIAL RESPONSES OVERALL

•

HEAD STYLE: ROOF

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.145 INCHES MAXIMUM IN
FASTENER LENGTH	0.553 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TYPE 11,CLASS 2 FED SPEC 1ST TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.190 INCHES NOMINAL IN
SHOULDER SHAPE	ROUND OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-7839 MIL SPEC ALL MATERIAL RESPONSES OR MIL-S-6049 MIL SPEC ALL MATERIAL RESPONSES OVERALL
HEAD STYLE	ROOF
THREAD DIRECTION	RIGHT-HAND
SURFACE TREATMENT	CADMIUM OVERALL
INTERNAL DRIVE STYLE	CROSS RECESS TYPE III

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

2R1864-2Reference document

Same NSN cross-reference

Reference document — Design control — primary reference

GS550BJ2Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is BM21010-3-4?

BM21010-3-4 is a SCREW,SHOULDER.

What parts can replace BM21010-3-4?

There are 2 known substitutes for BM21010-3-4: 2R1864-2, GS550BJ2. Substitute compatibility should be verified for your specific system.

What is the NSN for BM21010-3-4?

BM21010-3-4 is cataloged in the U.S. Government catalog under NSN 5305-01-477-4130. This indicates validated use in U.S. government and defense supply chains.

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