LH6521-108 — NUT,SELF-LOCKING,DOUBLE HEXAGON

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

LH6521-108: NUT,SELF-LOCKING,DOUBLE HEXAGON.

NUT,SELF-LOCKING,DOUBLE HEXAGON. Key specifications include material: STEEL COMP 8740 OVERALL, nut_style: DOUBLE HEXAGON, nut_height: 0.584 INCHES MAXIMUM IN, temp_rating: 450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5310-01-124-7709, 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

LH6521-108

NSN: 5310-01-124-7709
FSC: 5310 — Nuts and Washers
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)

SPECIFICATIONS

material	STEEL COMP 8740 OVERALL
nut_style	DOUBLE HEXAGON
nut_height	0.584 INCHES MAXIMUM IN
temp_rating	450.0 FAHRENHEIT NOMINAL DEGF
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
hardness_rating	39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM OVERALL
width_across_flats	0.930 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
nominal_thread_size	0.625 INCHES IN
NSN	5310-01-124-7709

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.930 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

TEMP RATING: 450.0 FAHRENHEIT NOMINAL DEGF

•

HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.625 INCHES IN

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.930 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
TEMP RATING	450.0 FAHRENHEIT NOMINAL DEGF
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.625 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT	0.584 INCHES MAXIMUM IN

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 1

SS5086-10Same 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 LH6521-108?

LH6521-108 is a NUT,SELF-LOCKING,DOUBLE HEXAGON.

What parts can replace LH6521-108?

There is 1 known substitute for LH6521-108: SS5086-10. Substitute compatibility should be verified for your specific system.

What is the NSN for LH6521-108?

LH6521-108 is cataloged in the U.S. Government catalog under NSN 5310-01-124-7709. This indicates validated use in U.S. government and defense supply chains.

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LH6521-108 — NUT,SELF-LOCKING,DOUBLE HEXAGON

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