Model: HY-521-7

Hexagon Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque with nonmetallic insert

Nut Style

Hexagon

Nut Height

0.338 inches

Width Across Flats

0.323 inches

Thread Series

Unc

Thready Qty Per Inch (tpi)

Thread Size

0.138 inches

Bearing Surface Type

Flat

Material

Aluminum alloy nut

Material

Plastic polyamide locking insert

Surface Treatment

Anodize nut

NSN

5310-00-550-0989

Part Number

HY-521-7

Description

Nut,self-locking,hexagon

CAGE

09448

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, cap.

Part HY-521-7 NSN 5310-00-550-0989

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05277

FIIG:

A021A0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

013540

UFC:

05680

LTL:

70.0

LCL:

70.0

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7616995095
SITC: 69979
End Use: Finished metal shapes
NAICS: 332999
USDA: 1

Freight Class: Articles of aluminum nesoi