21-878-0409 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

21-878-0409: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL PROPERTY CLASS 8.8 OVERALL, head_style: HEXAGON, head_height: 5.5 MILLIMETERS NOMINAL MM, thread_length: 13.0 MILLIMETERS MINIMUM AND 35.0 MILLIMETERS MAXIMUM MM, fastener_length: 35.00 MILLIMETERS NOMINAL MM, hardness_rating: 18.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-155-5441, 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

21-878-0409

NSN: 5305-01-155-5441
FSC: 5305 — Screws
CAGE: INTE8 — REPLACEMENT NSN OF TEMPORARILY MAINTAINED NSN

SPECIFICATIONS

material	STEEL PROPERTY CLASS 8.8 OVERALL
head_style	HEXAGON
head_height	5.5 MILLIMETERS NOMINAL MM
thread_length	13.0 MILLIMETERS MINIMUM AND 35.0 MILLIMETERS MAXIMUM MM
fastener_length	35.00 MILLIMETERS NOMINAL MM
hardness_rating	18.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL
thread_direction	RIGHT-HAND
surface_treatment	ZINC OVERALL
width_between_flats	13.0 MILLIMETERS NOMINAL MM
nominal_thread_diameter	8.0 MILLIMETERS MM
minimum_tensile_strength	113784 POUNDS PER SQUARE INCH LBS
thread_series_designator	M
NSN	5305-01-155-5441

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 5.5 MILLIMETERS NOMINAL MM

•

FASTENER LENGTH: 35.00 MILLIMETERS NOMINAL MM

•

THREAD PITCH IN MILLIMETERS: 1.25

•

THREAD LENGTH: 13.0 MILLIMETERS MINIMUM AND 35.0 MILLIMETERS MAXIMUM MM

•

HARDNESS RATING: 18.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL

•

NOMINAL THREAD DIAMETER: 8.0 MILLIMETERS MM

•

HEAD STYLE: HEXAGON

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	5.5 MILLIMETERS NOMINAL MM
FASTENER LENGTH	35.00 MILLIMETERS NOMINAL MM
THREAD PITCH IN MILLIMETERS	1.25
THREAD LENGTH	13.0 MILLIMETERS MINIMUM AND 35.0 MILLIMETERS MAXIMUM MM
HARDNESS RATING	18.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER	8.0 MILLIMETERS MM
HEAD STYLE	HEXAGON
THREAD DIRECTION	RIGHT-HAND
WIDTH BETWEEN FLATS	13.0 MILLIMETERS NOMINAL MM
SURFACE TREATMENT	ZINC OVERALL

SUBSTITUTES & CROSS-REFERENCES 5

DIN931-M8X35-8,8-A2LReference document

Same NSN cross-reference

Reference document — Secondary reference

132861Reference document

Same NSN cross-reference

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

ISO4014-M8X35-8,8-A2LSame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

HCE-1000 M8X1.25X35Reference document

Same NSN cross-reference

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

ISO4014Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 21-878-0409?

21-878-0409 is a SCREW,CAP,HEXAGON HEAD.

What parts can replace 21-878-0409?

There are 5 known substitutes for 21-878-0409: DIN931-M8X35-8,8-A2L, 132861, ISO4014-M8X35-8,8-A2L and 2 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 21-878-0409?

21-878-0409 is cataloged in the U.S. Government catalog under NSN 5305-01-155-5441. This indicates validated use in U.S. government and defense supply chains.

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21-878-0409 — SCREW,CAP,HEXAGON HEAD

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