K-4-3-27 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

K-4-3-27: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL UNS K03104 FASTENER, head_style: FLAT CHAMFER, head_height: 0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.921 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN, thread_length: 1.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-384-9112, 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

K-4-3-27

NSN: 5305-01-384-9112
FSC: 5305 — Screws
CAGE: 07309 — BIRD-JOHNSON PROPELLER COMPANY, LLC (USA)

SPECIFICATIONS

material	STEEL UNS K03104 FASTENER
head_style	FLAT CHAMFER
head_height	0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
thread_class	3A A
head_diameter	0.921 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
thread_length	1.750 INCHES NOMINAL IN
surface_finish	63.0 MICROINCHES BEARING SURFACE OF HEAD
fastener_length	2.000 INCHES NOMINAL IN
hardness_rating	37.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
locking_feature	PATCH OR PELLET OR STRIP THREADS
thread_direction	RIGHT-HAND
surface_treatment	PASSIVATE FASTENER
NSN	5305-01-384-9112

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE FINISH: 32.0 MICROINCHES THREADS

•

WIDTH ACROSS FLATS: 0.500 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN

•

HEAD HEIGHT: 0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN

•

FASTENER LENGTH: 2.000 INCHES NOMINAL IN

•

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

•

THREAD LENGTH: 1.750 INCHES NOMINAL IN

TECHNICAL CHARACTERISTICS

SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE FINISH	63.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH	63.0 MICROINCHES FASTENER
WIDTH ACROSS FLATS	0.500 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
HEAD HEIGHT	0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
FASTENER LENGTH	2.000 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
THREAD LENGTH	1.750 INCHES NOMINAL IN
HARDNESS RATING	37.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE FASTENER

OTHER ITEMS IN FSC 5305 — Screws

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

5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753

SUBSTITUTES & CROSS-REFERENCES 2

SF10981ITEM41Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

112157083 FIND 87Reference document

Same NSN cross-reference

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

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is K-4-3-27?

K-4-3-27 is a SCREW,CAP,SOCKET HEAD.

What parts can replace K-4-3-27?

There are 2 known substitutes for K-4-3-27: SF10981ITEM41, 112157083 FIND 87. Substitute compatibility should be verified for your specific system.

What is the NSN for K-4-3-27?

K-4-3-27 is cataloged in the U.S. Government catalog under NSN 5305-01-384-9112. This indicates validated use in U.S. government and defense supply chains.

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