Model: 25906

Flat Washer

Properties:

Cross Sectional Shape

Rectangular

Hole Diameter

Between 0.139 inches and 0.159 inches

Edge Shape

Round

Center Hole Shape

1 round

Center Hole Shape

Round

Thickness

Between 0.022 inches and 0.042 inches

Overall Diameter

Between 0.370 inches and 0.395 inches

End Application

W/s: support equipment, b-52 aircraft; airborne mobile dir air spt ctl (2id), (02m jul83) (an/uyq-3a); fire pumps; engine, aircraft tf33-pw-102 (c-135e, ec-135h/k/p); aircraft, thunderbolt ii, a-10; aircraft, (ac-130h, mc130h, ec-130e, hc-130); test consoles, mini-sace; support equipment, b-1 aircraft; trainer, b-1b aircraft; missile, advanced medium range, air-to-air (amraam)/aim120a

Material

Steel

Material Specification

Mil-s-7952 military specification single material response or qq-s-698 federal specification single material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

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

Nondefinitive Specification/std Data

A type and 2 grade and a class

NSN

5310-00-167-0816

Part Number

25906

Description

Washer,flat

CAGE

99167

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes disk, valve, graphite impregnated and lubricated items.

Part 25906 NSN 5310-00-167-0816

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

13393

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:

0.1000lbs

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:

194160

UFC:

55210

LTL:

50.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318220000
SITC: 69422
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Washers other than lock washers, iron or steel