16990L-4F-8C — SCREW,CAP,SOCKET HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

16990L-4F-8C: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING FASTENER, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.218 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN, thread_length: 0.376 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN, fastener_length: 0.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-284-9677, 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

16990L-4F-8C

NSN: 5305-01-284-9677
FSC: 5305 — Screws
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)

SPECIFICATIONS

material	STEEL CORROSION RESISTING FASTENER
head_style	FLAT COUNTERSUNK
thread_class	3A A
head_diameter	0.218 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
thread_length	0.376 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN
fastener_length	0.500 INCHES NOMINAL IN
hardness_rating	36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM FASTENER
locking_feature	STRIP THREADS
thread_direction	RIGHT-HAND
countersink_angle	80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
surface_treatment	CADMIUM FASTENER
width_across_flats	0.0625 INCHES NOMINAL IN
NSN	5305-01-284-9677

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.0625 INCHES NOMINAL IN

•

FASTENER LENGTH: 0.500 INCHES NOMINAL IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 1 FED SPEC SINGLE TREATMENT RESPONSE FASTENER

•

THREAD LENGTH: 0.376 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN

•

HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM FASTENER

•

NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.0625 INCHES NOMINAL IN
FASTENER LENGTH	0.500 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 1 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
THREAD LENGTH	0.376 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM FASTENER
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND
LOCKING FEATURE	STRIP THREADS
SURFACE TREATMENT	CADMIUM 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 1

94700L-4F-8CSame 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 16990L-4F-8C?

16990L-4F-8C is a SCREW,CAP,SOCKET HEAD.

What parts can replace 16990L-4F-8C?

There is 1 known substitute for 16990L-4F-8C: 94700L-4F-8C. Substitute compatibility should be verified for your specific system.

What is the NSN for 16990L-4F-8C?

16990L-4F-8C is cataloged in the U.S. Government catalog under NSN 5305-01-284-9677. This indicates validated use in U.S. government and defense supply chains.

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16990L-4F-8C — SCREW,CAP,SOCKET HEAD

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