ASME B18.2.1A — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

ASME B18.2.1A: 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: 0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.000 INCHES NOMINAL IN, fastener_length: 4.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-082-6821, 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

ASME B18.2.1A

NSN: 5305-00-082-6821
NIINs: 000826821, 009352931, 010997207, 012987675, 014110055, 014218223, 014581624
FSC: 5305 — Screws
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)

SPECIFICATIONS

material	STEEL OVERALL
head_style	HEXAGON
head_height	0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
thread_class	2A A
thread_length	1.000 INCHES NOMINAL IN
fastener_length	4.750 INCHES NOMINAL IN
locking_feature	PATCH OR STRIP THREADS
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM AND CHROMATE OVERALL
width_between_flats	0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
nominal_thread_diameter	0.375 INCHES IN
thread_quantity_per_inch	16
NSN	5305-00-082-6821

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN

•

FASTENER LENGTH: 1.688 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 1.500 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN

•

HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL

•

MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429 ASSN STD ALL MATERIAL RESPONSES OVERALL

•

NOMINAL THREAD DIAMETER: 0.750 INCHES IN

•

HEAD STYLE: HEXAGON

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
FASTENER LENGTH	1.688 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	1.500 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
HARDNESS RATING	32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	SAE J429 ASSN STD ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER	0.750 INCHES IN
HEAD STYLE	HEXAGON
THREAD DIRECTION	RIGHT-HAND
WIDTH BETWEEN FLATS	1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN

SUBSTITUTES & CROSS-REFERENCES 6

ASME-B18.2.1Reference document

Same NSN cross-reference

Reference document — Secondary reference

FF-S-85Reference document

Same NSN cross-reference

Reference document — Identification reference

B1821BH075F175NReference document

Same NSN cross-reference

Reference document — Secondary reference

18C1228Reference document

Same NSN cross-reference

Reference document — Secondary reference

MS90727-186Reference document

Same NSN cross-reference

Reference document — Secondary reference

10082383Reference 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 ASME B18.2.1A?

ASME B18.2.1A is a SCREW,CAP,HEXAGON HEAD.

What parts can replace ASME B18.2.1A?

There are 6 known substitutes for ASME B18.2.1A: ASME-B18.2.1, FF-S-85, B1821BH075F175N and 3 more. Substitute compatibility should be verified for your specific system.

What is the NSN for ASME B18.2.1A?

ASME B18.2.1A is cataloged in the U.S. Government catalog under NSN 5305-00-082-6821. This indicates validated use in U.S. government and defense supply chains.

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ASME B18.2.1A — SCREW,CAP,HEXAGON HEAD

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