Model: F188

Hexagon Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque with nonmetallic insert

Nut Style

Hexagon

Nut Height

Between 0.240 inches and 0.360 inches

Width Across Flats

Between 0.428 inches and 0.439 inches

Tempurature Rating

250.0 degrees fahrenheit

Thread Series

Unc

Thready Qty Per Inch (tpi)

Thread Size

0.250 inches

Countersink Angle

88.0 degrees nut

Bearing Surface Type

Chamfered

Bearing Surface Finish

125.0 microinches

Material

Plastic polyhexamethylene amide locking insert

Material

Steel comp 301 nut or steel comp 302 nut or steel comp 303 nut or steel comp 303f nut or steel comp 303s nut or steel comp 304 nut or steel comp 304l nut or steel comp 305 nut or steel comp 308 nut or steel comp 309 nut or steel comp 310 nut or steel comp 310s nut or steel comp 314 nut or steel comp 316 nut or steel comp 316l nut or steel comp 317 nut or steel comp 321 nut or steel comp 323 nut or steel comp 324 nut or steel comp 347 nut or steel comp 348 nut or steel comp 385 nut or steel comp 302b nut or steel comp 384 nut

Material Specification

66 federal standard all material responses nut

Material Specification

Mil-m-20693, comp a, type 1 military specification single material response locking insert

Surface Treatment

Passivate nut

Surface Treatment Specification

Qq-p-35 federal specification single treatment response nut

NSN

5310-00-241-6604

Part Number

F188

Description

Nut,self-locking,hexagon

CAGE

00365

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 F188 NSN 5310-00-241-6604

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:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.1000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

573

TCC:

SHC:

ACC:

Construction Materials

Pricing & Availability Check

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Schedule B and Export

Schedule B: 7318160000
SITC: 69421
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Nuts of iron or steel