5C-20 — NUT,SELF-LOCKING,ROUND

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

5C-20: NUT,SELF-LOCKING,ROUND.

The NUT,SELF-LOCKING,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL EXCEPT INSERT, nut_style: ROUND, nut_diameter: 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 0.315 INCHES NOMINAL IN, thread_series: UNS. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-139-6791, 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

5C-20

NSN: 5310-01-139-6791
FSC: 5310 — Nuts and Washers
CAGE: 06641 — CENTURY FASTENERS CORP. DBA CENTURY FASTENERS CORP (USA)

SPECIFICATIONS

material	STEEL COMP 4130 OVERALL EXCEPT INSERT
nut_style	ROUND
nut_diameter	0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
thread_class	3B
nut_thickness	0.315 INCHES NOMINAL IN
thread_series	UNS
locking_feature	PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_direction	RIGHT-HAND
drive_point_depth	0.080 INCHES NOMINAL IN
surface_treatment	OXIDE OVERALL EXCEPT INSERT
nominal_thread_size	0.664 INCHES IN
drive_point_diameter	0.092 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
NSN	5310-01-139-6791

COMPONENT DIAGRAM

KEY FEATURES

•

THREAD SERIES: UNS

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.664 INCHES IN

•

NUT DIAMETER: 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN

•

DRIVE POINT DEPTH: 0.080 INCHES NOMINAL IN

•

LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT

•

NUT THICKNESS: 0.315 INCHES NOMINAL IN

•

DRIVE POINT DIAMETER: 0.092 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN

TECHNICAL CHARACTERISTICS

THREAD SERIES	UNS
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.664 INCHES IN
NUT DIAMETER	0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
DRIVE POINT DEPTH	0.080 INCHES NOMINAL IN
LOCKING FEATURE	PREVAILING TORQUE WITH NONMETALLIC INSERT
NUT THICKNESS	0.315 INCHES NOMINAL IN
DRIVE POINT DIAMETER	0.092 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
SURFACE TREATMENT	OXIDE OVERALL EXCEPT INSERT
DRIVE POINT QUANTITY	4

OTHER ITEMS IN FSC 5310 — Nuts and Washers

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

5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540

SUBSTITUTES & CROSS-REFERENCES 2

10109773Reference document

Same NSN cross-reference

Reference document — Informative reference only

2493734Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 5C-20?

5C-20 is a NUT,SELF-LOCKING,ROUND.

What parts can replace 5C-20?

There are 2 known substitutes for 5C-20: 10109773, 2493734. Substitute compatibility should be verified for your specific system.

What is the NSN for 5C-20?

5C-20 is cataloged in the U.S. Government catalog under NSN 5310-01-139-6791. This indicates validated use in U.S. government and defense supply chains.

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