20640-A — NUT,PLAIN,HEXAGON

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

20640-A: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: COBALT ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.484 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-914-6901, 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

20640-A

NSN: 5310-00-914-6901
FSC: 5310 — Nuts and Washers
CAGE: 04537 — ATWOOD & MORRILL CO., INC. DBA WEIR VALVES AND CONTROLS USA (USA)

SPECIFICATIONS

material	COBALT ALLOY OVERALL
nut_style	HEXAGON
nut_height	0.484 INCHES NOMINAL IN
thread_class	2B
thread_series	UNIFIED NATIONAL COARSE (UNC)
thread_direction	RIGHT-HAND
width_across_flats	0.875 INCHES NOMINAL IN
nominal_thread_size	0.500 INCHES IN
bearing_surface_type	WASHER FACED
bearing_surface_finish	125.0 MICROINCHES
thread_quantity_per_inch	13
criticality_code_justification	ZZZY
NSN	5310-00-914-6901

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.875 INCHES NOMINAL IN

•

BEARING SURFACE FINISH: 125.0 MICROINCHES

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

CRITICALITY CODE JUSTIFICATION: ZZZY

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.500 INCHES IN

•

NUT HEIGHT: 0.484 INCHES NOMINAL IN

•

NUT STYLE: HEXAGON

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.875 INCHES NOMINAL IN
BEARING SURFACE FINISH	125.0 MICROINCHES
THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
CRITICALITY CODE JUSTIFICATION	ZZZY
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.500 INCHES IN
NUT HEIGHT	0.484 INCHES NOMINAL IN
NUT STYLE	HEXAGON
THREAD CLASS	2B
THREAD QUANTITY PER INCH	13

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

20095FPC5Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

20095-F PT.5Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 20640-A?

20640-A is a NUT,PLAIN,HEXAGON.

What parts can replace 20640-A?

There are 2 known substitutes for 20640-A: 20095FPC5, 20095-F PT.5. Substitute compatibility should be verified for your specific system.

What is the NSN for 20640-A?

20640-A is cataloged in the U.S. Government catalog under NSN 5310-00-914-6901. This indicates validated use in U.S. government and defense supply chains.

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20640-A — NUT,PLAIN,HEXAGON

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