CA21128-4-1 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

CA21128-4-1: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, head_style: HEXAGON, head_height: 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.510 INCHES NOMINAL IN, fastener_length: 1.230 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-131-8167, 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

CA21128-4-1

NSN: 5305-01-131-8167
FSC: 5305 — Screws
CAGE: 29372 — HOWMET GLOBAL FASTENING SYSTEMS INC. DIV TRIDAIR PRODUCTS (USA)

SPECIFICATIONS

material	STEEL COMP 630 OVERALL
head_style	HEXAGON
head_height	0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
thread_class	3A A
thread_length	0.510 INCHES NOMINAL IN
fastener_length	1.230 INCHES NOMINAL IN
thread_direction	RIGHT-HAND
surface_treatment	PASSIVATE OVERALL
width_across_flats	0.141 INCHES NOMINAL IN
width_between_flats	0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
internal_drive_style	HEXAGON
nominal_thread_diameter	0.250 INCHES IN
NSN	5305-01-131-8167

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.141 INCHES NOMINAL IN

•

HEAD HEIGHT: 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN

•

FASTENER LENGTH: 1.230 INCHES NOMINAL IN

•

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

•

THREAD LENGTH: 0.510 INCHES NOMINAL IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD STYLE: HEXAGON

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.141 INCHES NOMINAL IN
HEAD HEIGHT	0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
FASTENER LENGTH	1.230 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.510 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	HEXAGON
THREAD DIRECTION	RIGHT-HAND
WIDTH BETWEEN FLATS	0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN

OTHER ITEMS IN FSC 5305 — Screws

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831

SUBSTITUTES & CROSS-REFERENCES 1

PC91004-2Reference document

Same NSN cross-reference

Reference document — Vendor item drawing 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 CA21128-4-1?

CA21128-4-1 is a SCREW,CAP,SOCKET HEAD.

What parts can replace CA21128-4-1?

There is 1 known substitute for CA21128-4-1: PC91004-2. Substitute compatibility should be verified for your specific system.

What is the NSN for CA21128-4-1?

CA21128-4-1 is cataloged in the U.S. Government catalog under NSN 5305-01-131-8167. This indicates validated use in U.S. government and defense supply chains.

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CA21128-4-1 — SCREW,CAP,SOCKET HEAD

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