Model: 388708-27

Lock Washer

Properties:

Hole Diameter

Between 0.195 inches and 0.204 inches

Outside Diameter

Between 0.395 inches and 0.410 inches

Material Thickness

Between 0.020 inches and 0.025 inches

End Application

W/s: shipboard material handling equipment (mhe); airborne mobile dir air spt ctl (2id), (02m jul83)(an/uyq-3a); aircraft (ac-130h, mc-130h, ec-130e, hc-130); close in weapon system (ciws-phalanx); support equipment, b-1 aircraft; missile, air intercept, sidewinder (aim-9); fire control system, missile mk 74 (fcs); engine, aircraft tf33-p-3/5/9 (c/ec-135, b-52h); gun mount, mk 75 (gm); fire pumps

Hardness Rating

Between 40.0 rockwell c and 50.0 rockwell c

Material

Steel comp 1050 or steel comp 1551 or steel comp 1059 or steel comp 1060 or steel comp 1561 or steel comp 1064

Material Specification

66 federal standard all material responses

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416, type 2, cl 3 federal specification single treatment response

Style Designator

Flat external teeth

NSN

5310-00-596-7691

Part Number

388708-27

Description

Washer,lock

CAGE

10001

A washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces

Part 388708-27 NSN 5310-00-596-7691

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

14218

FIIG:

A022B0

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:

194160

UFC:

55210

LTL:

50.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318210000
SITC: 69422
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Spring washers and other lock washers, iron or steel