C7521-4-18 — BOLT,SHEAR

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

C7521-4-18: BOLT,SHEAR.

The BOLT,SHEAR is a the manufacturer industrial component. Key specifications include material: STEEL COMP H11 OVERALL, head_style: SPLINE DRIVE SHEAR HEAD, grip_length: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN, head_height: 0.164 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-280-5729, 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

C7521-4-18

NSN: 5306-01-280-5729
FSC: 5306 — Bolts
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)

SPECIFICATIONS

material	STEEL COMP H11 OVERALL
head_style	SPLINE DRIVE SHEAR HEAD
grip_length	1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN
head_height	0.164 INCHES NOMINAL IN
thread_class	3A A
grip_diameter	0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN
head_diameter	0.531 INCHES MAXIMUM IN
thread_length	0.335 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
surface_finish	32.0 MICROINCHES THREADS
fastener_length	1.470 INCHES MINIMUM AND 1.520 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM AND CHROMATE OVERALL
NSN	5306-01-280-5729

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE FINISH: 32.0 MICROINCHES THREADS

•

HEAD HEIGHT: 0.164 INCHES NOMINAL IN

•

FASTENER LENGTH: 1.470 INCHES MINIMUM AND 1.520 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.335 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

TECHNICAL CHARACTERISTICS

SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
HEAD HEIGHT	0.164 INCHES NOMINAL IN
FASTENER LENGTH	1.470 INCHES MINIMUM AND 1.520 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.335 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	SPLINE DRIVE SHEAR HEAD

OTHER ITEMS IN FSC 5306 — Bolts

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

5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017

SUBSTITUTES & CROSS-REFERENCES 2

AIC596-4-18Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

PBF7521-4-18Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 C7521-4-18?

C7521-4-18 is a BOLT,SHEAR.

What parts can replace C7521-4-18?

There are 2 known substitutes for C7521-4-18: AIC596-4-18, PBF7521-4-18. Substitute compatibility should be verified for your specific system.

What is the NSN for C7521-4-18?

C7521-4-18 is cataloged in the U.S. Government catalog under NSN 5306-01-280-5729. This indicates validated use in U.S. government and defense supply chains.

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