K49721-3 — NUT,SELF-LOCKING,CLINCH

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

K49721-3: NUT,SELF-LOCKING,CLINCH.

The NUT,SELF-LOCKING,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), hardness_rating: 32.0 ROCKWELL C MINIMUM, locking_feature: PREVAILING TORQUE ALL METAL DESIGN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-369-5683, 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

K49721-3

NSN: 5310-00-369-5683
NIINs: 003695683, 010881998
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)

SPECIFICATIONS

material	STEEL CORROSION RESISTING OVERALL
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
hardness_rating	32.0 ROCKWELL C MINIMUM
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
surface_treatment	SILVER OVERALL
nominal_thread_size	0.190 INCHES IN
counterbore_diameter	0.204 INCHES MINIMUM AND 0.209 INCHES MAXIMUM NUT IN
nut_counterbore_depth	0.075 INCHES MINIMUM AND 0.110 INCHES MAXIMUM NUT IN
thread_quantity_per_inch	32
material_document_and_classification	AMS5709 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN	5310-00-369-5683

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

HARDNESS RATING: 32.0 ROCKWELL C MINIMUM

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5709 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

NUT COUNTERBORE DEPTH: 0.075 INCHES MINIMUM AND 0.110 INCHES MAXIMUM NUT IN

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.190 INCHES IN

•

COUNTERBORE DIAMETER: 0.204 INCHES MINIMUM AND 0.209 INCHES MAXIMUM NUT IN

TECHNICAL CHARACTERISTICS

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
HARDNESS RATING	32.0 ROCKWELL C MINIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5709 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NUT COUNTERBORE DEPTH	0.075 INCHES MINIMUM AND 0.110 INCHES MAXIMUM NUT IN
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.190 INCHES IN
COUNTERBORE DIAMETER	0.204 INCHES MINIMUM AND 0.209 INCHES MAXIMUM NUT IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
SURFACE TREATMENT	SILVER OVERALL

SUBSTITUTES & CROSS-REFERENCES 3

L10620-6-3Reference document

Same NSN cross-reference

Reference document — Design control — primary reference

4002826Reference document

Same NSN cross-reference

Reference document — Secondary reference

76756-1032Same 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 K49721-3?

K49721-3 is a NUT,SELF-LOCKING,CLINCH.

What parts can replace K49721-3?

There are 3 known substitutes for K49721-3: L10620-6-3, 4002826, 76756-1032. Substitute compatibility should be verified for your specific system.

What is the NSN for K49721-3?

K49721-3 is cataloged in the U.S. Government catalog under NSN 5310-00-369-5683. This indicates validated use in U.S. government and defense supply chains.

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