Model: MS51866-18C

Spline Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design or prevailing torque with nonmetallic insert

Pilot Diameter

Between 0.384 inches and 0.388 inches

Pilot Length

Between 0.173 inches and 0.203 inches

Lubrication

Dry film lubricant

Nut Style

Spline

Nut Diameter

Between 0.548 inches and 0.578 inches

Nut Height

0.376 inches

Tempurature Rating

250.0 degrees fahrenheit

Thread Series

Unf

Thready Qty Per Inch (tpi)

Thread Size

0.250 inches

Material

Steel comp 301 nut or steel comp 302 nut or steel comp 302b nut or steel comp 303 nut or steel comp 303se 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 309s 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 347 nut or steel comp 348 nut or steel comp 384 nut or steel comp 385 nut

Surface Treatment

Passivate except insert

Surface Treatment Specification

Qq-p-35 type 2 federal specification single treatment response except insert

NSN

5310-01-454-1291

Part Number

MS51866-18C

Description

Nut,self-locking,spline

CAGE

96906

A nut having an externally splined sleeve, which holds it in position when forced into a hole of slightly smaller diameter. An integral feature is incorporated for locking.

Part MS51866-18C NSN 5310-01-454-1291

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

15893

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:

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:

Trailers/Vehicles

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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