MS51491-012 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

MS51491-012: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.686 INCHES NOMINAL IN, fastener_length: 0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-355-7609, 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

MS51491-012

NSN: 5305-01-355-7609
FSC: 5305 — Screws
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

SPECIFICATIONS

material	STEEL OVERALL
head_style	HEXAGON
head_height	0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
thread_class	2A A
thread_length	0.686 INCHES NOMINAL IN
fastener_length	0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
surface_treatment	ZINC OVERALL
width_between_flats	0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
nominal_thread_diameter	0.312 INCHES IN
thread_quantity_per_inch	18
thread_series_designator	UNIFIED NATIONAL COARSE (UNC)
NSN	5305-01-355-7609

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN

•

FASTENER LENGTH: 0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633-78,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.686 INCHES NOMINAL IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429,GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.312 INCHES IN

•

HEAD STYLE: HEXAGON

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
FASTENER LENGTH	0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTM B633-78,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.686 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION	SAE J429,GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.312 INCHES IN
HEAD STYLE	HEXAGON
THREAD DIRECTION	RIGHT-HAND
WIDTH BETWEEN FLATS	0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
SURFACE TREATMENT	ZINC OVERALL

SUBSTITUTES & CROSS-REFERENCES 1

X-3875Reference 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 MS51491-012?

MS51491-012 is a SCREW,CAP,HEXAGON HEAD.

What parts can replace MS51491-012?

There is 1 known substitute for MS51491-012: X-3875. Substitute compatibility should be verified for your specific system.

What is the NSN for MS51491-012?

MS51491-012 is cataloged in the U.S. Government catalog under NSN 5305-01-355-7609. This indicates validated use in U.S. government and defense supply chains.

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