MS51021-21A — SETSCREW

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

MS51021-21A: SETSCREW.

The SETSCREW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 316 OVERALL, head_style: HEADLESS (SETSCREW), point_style: CUP, thread_class: 3A A, thread_length: 0.125 INCHES MAXIMUM IN, fastener_length: 0.125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-531-0137, 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

MS51021-21A

NSN: 5305-00-531-0137
FSC: 5305 — Screws
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

SPECIFICATIONS

material	STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 316 OVERALL
head_style	HEADLESS (SETSCREW)
point_style	CUP
thread_class	3A A
thread_length	0.125 INCHES MAXIMUM IN
fastener_length	0.125 INCHES NOMINAL IN
thread_direction	RIGHT-HAND
surface_treatment	PASSIVATE OVERALL
width_across_flats	0.062 INCHES NOMINAL IN
internal_drive_style	HEXAGON
nominal_thread_diameter	0.138 INCHES IN
thread_quantity_per_inch	32
NSN	5305-00-531-0137

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.062 INCHES NOMINAL IN

•

FASTENER LENGTH: 0.125 INCHES NOMINAL IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.125 INCHES MAXIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL

•

NOMINAL THREAD DIAMETER: 0.138 INCHES IN

•

HEAD STYLE: HEADLESS (SETSCREW)

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.062 INCHES NOMINAL IN
FASTENER LENGTH	0.125 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.125 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	66 FED STD ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER	0.138 INCHES IN
HEAD STYLE	HEADLESS (SETSCREW)
THREAD DIRECTION	RIGHT-HAND
POINT STYLE	CUP
SURFACE TREATMENT	PASSIVATE OVERALL

SUBSTITUTES & CROSS-REFERENCES 9

AN565DC6L2Reference document

Same NSN cross-reference

Reference document — Replaced / superseded reference

411135-602Reference document

Same NSN cross-reference

Reference document — Secondary reference

AN565DC6H2Reference document

Same NSN cross-reference

Reference document — Secondary reference

335C677A0632D02Reference document

Same NSN cross-reference

Reference document — Secondary reference

033-07941-021Reference document

Same NSN cross-reference

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

5305PL1388595Reference document

Same NSN cross-reference

Reference document — Informative reference only

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is MS51021-21A?

MS51021-21A is a SETSCREW.

What parts can replace MS51021-21A?

There are 9 known substitutes for MS51021-21A: AN565DC6L2, 411135-602, AN565DC6H2 and 6 more. Substitute compatibility should be verified for your specific system.

What is the NSN for MS51021-21A?

MS51021-21A is cataloged in the U.S. Government catalog under NSN 5305-00-531-0137. This indicates validated use in U.S. government and defense supply chains.

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