B18.2.3.1M — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

B18.2.3.1M: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL PROPERTY CLASS 10.9 OVERALL, head_style: HEXAGON, grip_length: 6.80 MILLIMETERS MINIMUM AND 13.00 MILLIMETERS MAXIMUM MM, head_height: 6.17 MILLIMETERS MINIMUM AND 6.63 MILLIMETERS MAXIMUM MM, thread_length: 26.0 MILLIMETERS NOMINAL MM, fastener_length: 50.0 MILLIMETERS NOMINAL MM. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-303-5631, 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

B18.2.3.1M

NSN: 5305-01-303-5631
NIINs: 013035631, 013811202, 013862146, 014189132, 014235384, 014238236, 014356289, 014380369, 014927913, 014953937, 015699606, 015699874, 016200421, 016308617
FSC: 5305 — Screws
CAGE: 05047 — THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS (USA)

SPECIFICATIONS

material	STEEL PROPERTY CLASS 10.9 OVERALL
head_style	HEXAGON
grip_length	6.80 MILLIMETERS MINIMUM AND 13.00 MILLIMETERS MAXIMUM MM
head_height	6.17 MILLIMETERS MINIMUM AND 6.63 MILLIMETERS MAXIMUM MM
thread_length	26.0 MILLIMETERS NOMINAL MM
fastener_length	50.0 MILLIMETERS NOMINAL MM
hardness_rating	33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM OVERALL
special_features	M10X25 HEX CAP 10.9 ZINCBOLT FOR LAV-D KIT.;MATERIAL: SAE J 1199 PROPERTY CLASS 10.9;FINISH: ASTM F 1941M,ZINC COATING FE/ZN,TYPE 12C
thread_direction	RIGHT-HAND
features_provided	FINISHED HEAD
surface_treatment	ZINC OVERALL
width_between_flats	16.0 MILLIMETERS NOMINAL MM
NSN	5305-01-303-5631

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 5.10 MILLIMETERS MINIMUM AND 5.50 MILLIMETERS MAXIMUM MM

•

EXTERNAL THREAD TOLERANCE CLASS: 6G G

•

FASTENER LENGTH: 20.0 MILLIMETERS NOMINAL MM

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-Z-325 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD PITCH IN MILLIMETERS: 1.25

•

THREAD LENGTH: 17.5 MILLIMETERS MINIMUM AND 20.0 MILLIMETERS MAXIMUM MM

•

NOMINAL THREAD DIAMETER: 8.0 MILLIMETERS MM

•

HEAD STYLE: HEXAGON

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	5.10 MILLIMETERS MINIMUM AND 5.50 MILLIMETERS MAXIMUM MM
EXTERNAL THREAD TOLERANCE CLASS	6G G
FASTENER LENGTH	20.0 MILLIMETERS NOMINAL MM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-Z-325 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD PITCH IN MILLIMETERS	1.25
THREAD LENGTH	17.5 MILLIMETERS MINIMUM AND 20.0 MILLIMETERS MAXIMUM MM
NOMINAL THREAD DIAMETER	8.0 MILLIMETERS MM
HEAD STYLE	HEXAGON
THREAD DIRECTION	RIGHT-HAND
WIDTH BETWEEN FLATS	12.73 MILLIMETERS MINIMUM AND 13.00 MILLIMETERS MAXIMUM MM

SUBSTITUTES & CROSS-REFERENCES 3

DIN931M8X20Reference document

Same NSN cross-reference

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

12485434-092Reference document

Same NSN cross-reference

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

B18231B08020NReference 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 B18.2.3.1M?

B18.2.3.1M is a SCREW,CAP,HEXAGON HEAD.

What parts can replace B18.2.3.1M?

There are 3 known substitutes for B18.2.3.1M: DIN931M8X20, 12485434-092, B18231B08020N. Substitute compatibility should be verified for your specific system.

What is the NSN for B18.2.3.1M?

B18.2.3.1M is cataloged in the U.S. Government catalog under NSN 5305-01-303-5631. This indicates validated use in U.S. government and defense supply chains.

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B18.2.3.1M — SCREW,CAP,HEXAGON HEAD

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