Model: 28571

Lock Washer

Properties:

Hole Diameter

Between 0.576 inches and 0.596 inches

Outside Diameter

Between 0.960 inches and 0.985 inches

Material Thickness

Between 0.037 inches and 0.045 inches

End Application

Helicopter, mh-53e; helicopter, carrier based asw, sh-60f; airborne mobile dir air spt ctl (2id), (02m jul83)(an/uyq-3a); radar set, firefinder (an/tpq-36); aircraft, prowler ea-6b; helicopter, search and rescue, hh-60h; aircraft, c-2a (reprocured); helicopter, uscg search and rescue, hh-60j; helicopter, advance attack, ah-1w; support equipment, b-1 aircraft

Hardness Rating

Between 40.0 rockwell c and 50.0 rockwell c

Material

Steel comp 1050 or steel comp 1551 or steel comp 1552 or steel comp 1053 or steel comp 1055 or steel comp 1060 or steel comp 1561

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

Nondefinitive Specification/std Data

1 type and a grade and 1 style and 1 composition

NSN

5310-00-616-6354

Part Number

28571

Description

Washer,lock

CAGE

81142

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 28571 NSN 5310-00-616-6354

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:

0.3000lbs

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