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Made in USA - 5/16" Screw, PTFE Standard Flat Washer - 0.372" ID x 0.753" OD, 0.19" Thick, Plain Finish


Item #: 05402151
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Flat washers are standard washers used for general-purpose fastening. They are placed under the head of a bolt or above a nut to distribute clamping force and prevent fasteners from pulling through materials.
PTFE (polytetrafluoroethylene) has excellent resistance to corrosion, chemicals and moisture and is ideal for high-heat and corrosive environments.
Product Specifications
Type Standard
System of Measurement Inch
Screw Size 5/16
Inside Diameter (Decimal Inch) 0.3720
Outside Diameter (Decimal Inch) 0.7530
Thickness (Decimal Inch) 0.1900
Material PTFE
Finish/Coating Plain
Fastener Standard ASTM D3308
Maximum Inside Diameter (Decimal Inch) 0.3770
Minimum Outside Diameter (Decimal Inch) 0.7430
Minimum Thickness (Decimal Inch) 0.1850
Inside Diameter Tolerance (Decimal Inch) -0.005 to 0.005
Outside Diameter Tolerance (Decimal Inch) -0.010 to 0.010

$17.12

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Made in USA - 5/16" Screw, Steel External Tooth Lock Washer - Zinc-Plated, Grade 2


Item #: 70956123
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

External tooth lock washers have teeth along the outside diameter. They provide greater resistance to loosening than internal tooth lock washers.
Steel is strong and durable but less corrosion resistant than stainless steel. To improve its resistance to corrosion, it may receive additional finishes and coatings.
Product Specifications
Tooth Type External Tooth
Screw Size 5/16
System of Measurement Inch
Material Steel
Thickness (Decimal Inch) 0.029
Material Grade Grade 2
Finish/Coating Zinc-Plated
Minimum Inside Diameter (Decimal Inch) 0.3200
Maximum Inside Diameter (Decimal Inch) 0.3260
Minimum Outside Diameter (Decimal Inch) 0.5880
Maximum Outside Diameter (Decimal Inch) 0.6010
Military Specification Does Not Meet Military Specifications

$16.56

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Made in USA - 5/16" Screw, Steel Internal Tooth Lock Washer - Zinc-Plated, Grade 2


Item #: 70956081
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Internal tooth lock washers have teeth along the inside diameter. They prevent nut and bolt heads from loosening.
Steel is strong and durable but less corrosion resistant than stainless steel. To improve its resistance to corrosion, it may receive additional finishes and coatings.
Product Specifications
Tooth Type Internal Tooth
Screw Size 5/16
System of Measurement Inch
Material Steel
Thickness (Decimal Inch) 0.029
Material Grade Grade 2
Finish/Coating Zinc-Plated
Minimum Inside Diameter (Decimal Inch) 0.3200
Maximum Inside Diameter (Decimal Inch) 0.3320
Minimum Outside Diameter (Decimal Inch) 0.5940
Maximum Outside Diameter (Decimal Inch) 0.6070
Military Specification Does Not Meet Military Specifications

$8.63

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Made in USA - 5/16", 0.078" Thick Split Lock Washer - 1060 Spring Steel, Zinc Yellow Dichromate Finish, 0.314" Min ID, 0.322" Max ID, 0.583" Max OD


Item #: 57224453
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Split lock washers have a split at one point along their outer diameter, which creates compression and tension to lock the nut in place. Split lock washers are used in high-vibration applications.
Spring steel is a low-alloy, carbon steel with very high yield strength.
Product Specifications
System of Measurement Inch
Type Split Lock Washer
Screw Size 5/16
Material Spring Steel
Material Grade 1060
Finish/Coating Zinc Yellow Dichromate
Thickness (Decimal Inch) 0.0780
Minimum Inside Diameter (Decimal Inch) 0.3140
Maximum Inside Diameter (Decimal Inch) 0.3220
Maximum Outside Diameter (Decimal Inch) 0.5830
Military Specification Meets Military Specifications
Maximum Thickness (Decimal Inch) 0.0880
Fastener Standard MS35338

$5.37

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Made in USA - 5/16", 0.078" Thick Split Lock Washer - 316 Stainless Steel, 0.314" Min ID, 0.322" Max ID, 0.583" Max OD


Item #: 57224560
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Split lock washers have a split at one point along their outer diameter, which creates compression and tension to lock the nut in place. Split lock washers are used in high-vibration applications.
Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat. It is used in high-stress, outdoor and corrosive applications.
Product Specifications
System of Measurement Inch
Type Split Lock Washer
Screw Size 5/16
Material Stainless Steel
Material Grade 316
Thickness (Decimal Inch) 0.0780
Minimum Inside Diameter (Decimal Inch) 0.3140
Maximum Inside Diameter (Decimal Inch) 0.3220
Maximum Outside Diameter (Decimal Inch) 0.5830
Military Specification Meets Military Specifications
Maximum Thickness (Decimal Inch) 0.0880
Fastener Standard MS35338

$48.22

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Made in USA - 5/16", 0.078" Thick Split Lock Washer - 400 Stainless Steel, Passivated Finish, 0.314" Min ID, 0.322" Max ID, 0.583" Max OD


Item #: 57224487
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Split lock washers have a split at one point along their outer diameter, which creates compression and tension to lock the nut in place. Split lock washers are used in high-vibration applications.
Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat. It is used in high-stress, outdoor and corrosive applications.
Product Specifications
System of Measurement Inch
Type Split Lock Washer
Screw Size 5/16
Material Stainless Steel
Material Grade 400
Finish/Coating Passivated
Thickness (Decimal Inch) 0.0780
Minimum Inside Diameter (Decimal Inch) 0.3140
Maximum Inside Diameter (Decimal Inch) 0.3220
Maximum Outside Diameter (Decimal Inch) 0.5830
Military Specification Meets Military Specifications
Maximum Thickness (Decimal Inch) 0.0880
Fastener Standard MS35338

$75.49

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Made in USA - 5/16", 0.078" Thick Split Lock Washer - AISI 4037 Alloy Steel, Zinc Yellow Dichromate Finish, 0.314" Min ID, 0.322" Max ID, 0.583" Max OD


Item #: 70944780
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Split lock washers have a split at one point along their outer diameter, which creates compression and tension to lock the nut in place. Split lock washers are used in high-vibration applications.
Alloy steel is the strongest of all steel types. It has high tensile strength and offers excellent resistance to wear, fatigue and galling.
Product Specifications
System of Measurement Inch
Type Split Lock Washer
Screw Size 5/16
Material Alloy Steel
Material Grade AISI 4037
Finish/Coating Zinc Yellow Dichromate
Thickness (Decimal Inch) 0.0780
Minimum Inside Diameter (Decimal Inch) 0.3140
Maximum Inside Diameter (Decimal Inch) 0.3220
Maximum Outside Diameter (Decimal Inch) 0.5830
Military Specification Does Not Meet Military Specifications

$19.20

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Made in USA - 5/16", 0.078" Thick Split Lock Washer - AISI 4037 Alloy Steel, Zinc Yellow Dichromate Finish, 0.314" Min ID, 0.322" Max ID, 0.583" Max OD


Item #: 70996012
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Split lock washers have a split at one point along their outer diameter, which creates compression and tension to lock the nut in place. Split lock washers are used in high-vibration applications.
Alloy steel is the strongest of all steel types. It has high tensile strength and offers excellent resistance to wear, fatigue and galling.
Product Specifications
System of Measurement Inch
Type Split Lock Washer
Screw Size 5/16
Material Alloy Steel
Material Grade AISI 4037
Finish/Coating Zinc Yellow Dichromate
Thickness (Decimal Inch) 0.0780
Minimum Inside Diameter (Decimal Inch) 0.3140
Maximum Inside Diameter (Decimal Inch) 0.3220
Maximum Outside Diameter (Decimal Inch) 0.5830
Military Specification Does Not Meet Military Specifications

$5.87

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Made in USA - 5/16", 0.093" Thick Split Lock Washer - Alloy Steel, Uncoated, 0.318" Min ID, 0.338" Max ID, 0.46" Max OD


Item #: 88548649
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Split lock washers have a split at one point along their outer diameter, which creates compression and tension to lock the nut in place. Split lock washers are used in high-vibration applications.
Alloy steel is the strongest of all steel types. It has high tensile strength and offers excellent resistance to wear, fatigue and galling.
Product Specifications
System of Measurement Inch
Type Split Lock Washer
Screw Size 5/16
Material Alloy Steel
Finish/Coating Uncoated
Thickness (Decimal Inch) 0.0930
Minimum Inside Diameter (Decimal Inch) 0.3180
Maximum Inside Diameter (Decimal Inch) 0.3380
Maximum Outside Diameter (Decimal Inch) 0.4600
Military Specification Does Not Meet Military Specifications

$8.84

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Made in USA - 5/16", 0.534" OD, Zinc Flake, Steel Wedge Lock Washer - Grade 2, 0.336 to 0.344" ID


Item #: 70938469
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Steel is strong and durable but less corrosion resistant than stainless steel. To improve its resistance to corrosion, it may receive additional finishes and coatings.
Product Specifications
Screw Size (mm) M8
Screw Size (Inch) 5/16
System of Measurement Inch
Outside Diameter (Decimal Inch) 0.5340
Material Steel
Material Grade Grade 2
Finish/Coating Zinc Flake
Minimum Inside Diameter (Decimal Inch) 0.3360
Maximum Inside Diameter (Decimal Inch) 0.3440
Minimum Outside Diameter (Decimal Inch) 0.5260
Maximum Outside Diameter (Decimal Inch) 0.5340
Fastener Standard ISO 9001; ISO 14001

$25.46

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Made in USA - 5/16-3/8" Screw, 0.355" ID x 0.561" OD, Grade 17-7 PH-A Stainless Steel Triple Wave Washer - 0.01" Thick, 0.08" Overall Height, 0.014" Deflection


Item #: 01587542
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Triple wave washers have a greater load-bearing capacity than single wave washers but have a smaller diameter.
Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat. It is used in high-stress, outdoor and corrosive applications.
Product Specifications
Type Triple Wave Washer
Screw Size 5/16-3/8
System of Measurement Inch
Inside Diameter (Decimal Inch) 0.355
Outside Diameter (Decimal Inch) 0.561
Material Stainless Steel
Material Grade 17-7 PH-A
Overall Height (Decimal Inch) 0.080
Thickness (Decimal Inch) 0.010
Deflection (Decimal Inch) 0.0140
Load at Flat (Lb.) 16.30

$14.42

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.002" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188832
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0020
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0002 to 0.0002
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$136.79

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.003" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188865
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0030
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0003 to 0.0003
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$96.83

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.004" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188881
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0040
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0004 to 0.0004
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$132.28

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.005" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188899
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0050
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0005 to 0.0005
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$81.15

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.006" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188907
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0060
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0006 to 0.0006
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$81.43

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.007" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188915
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Inch) 2-1/8
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0070
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0007 to 0.0007
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$81.73

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.008" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188923
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Inch) 2-1/8
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0080
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0008 to 0.0008
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$107.79

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.01" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188808
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Inch) 2-1/8
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0100
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0010 to 0.0010
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$115.61

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Made in USA - 5/32" Long x 3/8" Wide Notch, 0.012" Thick Internal Notched Washer - 301-304 Stainless Steel, 1-1/2" ID, 2-1/8" OD


Item #: 07188816
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Inside Diameter (Decimal Inch) 1.5000
Inside Diameter (Inch) 1-1/2
Outside Diameter (Inch) 2-1/8
Outside Diameter (Decimal Inch) 2.1250
Notch Width (Decimal Inch) 0.3750
Notch Length (Decimal Inch) 0.1560
Notch Type Internal
Number of Notches 1
Material Stainless Steel
Material Grade 301-304
Thickness (Decimal Inch) 0.0120
Finish/Coating Uncoated
Inside Diameter Tolerance (Decimal Inch) 0.000 to 0.110
Outside Diameter Tolerance (Decimal Inch) -0.002 to 0.002
Thickness Tolerance (Decimal Inch) -0.0020 to 0.0020
Notch Width Tolerance (Decimal Inch) -0.005 to 0.005
Notch Length Tolerance (Decimal Inch) -0.005 to 0.005

$35.11

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