Locknut with Nylon Insert, Grade 8, Coarse Thread, 0.469" Thickness, 9/16" Across Flats, 3/8-16", Alloy Steel, Yellow Zinc Finish
(Pack of 50)

SKU:53981 Item#: 53981

Lawson Products

Keep this versatile Nyloc nut on hand for automotive, mechanical and construction projects. Nylon insert prevents damage to bolt threads, making this lock nut ideal for applications where vibration or movement could cause fasteners to loosen. Use this handy lock nut to secure engine parts, fasten gears and pulleys and connect metal components in structures where vibration might occur.
• Manufactured to IFI Standard 100/107
• Meets SAE Grade 8 strength requirements
• Identified by six symmetrically spaced marks on the chamfered surface on the top of the nut or two circumferential notches on the corners of the nut

Read More

Frequently Bought Together

DV_ZoomOriginal_P_41540.jpg

Hydraulic Quick Connect Nipple Steel 3/8" x 3/8-18

Item#: 29975
DV_ZoomOriginal_P_6168_WB.jpg

Z Series Crimp-On Hose End 3/4" x 1-5/16-12

Item#: 16625
DV_ZoomOriginal_P_6168_WB.jpg

Z Series Crimp-On Hose End 5/8" x 7/8-14

Item#: 16620
DV_ZoomOriginal_P_2191.jpg

PTO Pin Lock 1/4 x 2-1/2"

Item#: 64348
DV_ZoomOriginal_P_33479.jpg

SAE J995C Locknut with Nylon Insert Grade 8 1/2-13

Item#: 53983
DV_ZoomOriginal_I_88436.jpg

SAE Flat Washer Thru-Hardened Steel 5/16"

Item#: 88436
DV_ZoomOriginal_P_33478.jpg

Locknut with Nylon Insert Grade A 5/16-18

Item#: 302
DV_ZoomOriginal_P_33479.jpg

SAE J995C Locknut with Nylon Insert Grade 8 3/4-10

Item#: 53986
DV_ZoomOriginal_P_33479.jpg

Locknut with Nylon Insert Grade 8 7/16-14

Item#: 53982
DV_ZoomOriginal_P_31311.jpg

Hex Nut Grade 8 Alloy Steel 5/8-11

Item#: A106
DV_ZoomOriginal_P_31311.jpg

Hex Nut Grade 8 Alloy Steel 5/16-18

Item#: A101
DV_ZoomOriginal_P_32673.jpg

Hex Nut Grade 5 Steel 5/16-18

Item#: FA95678
DV_ZoomOriginal_P_32673.jpg

Hex Nut Grade 5 Steel 3/8-16

Item#: FA95679
DV_ZoomOriginal_P_32673.jpg

Hex Nut Grade 5 Steel 1/4-20

Item#: FA95677
DV_ZoomOriginal_P_31311.jpg

Hex Nut Grade 8 Alloy Steel 5/8-11

Item#: A106
DV_ZoomOriginal_P_31307.jpg

USS Flat Washer Thru-Hardened Steel 5/16"

Item#: 88446
DV_ZoomOriginal_I_1495188.jpg

Stepdown Butt Connector 22 to 18/16 to 14 AWG

Item#: 1495188
DV_ZoomOriginal_I_92822_WB.jpg

Butt Connector 22 to 18 AWG Red

Item#: 92822
DV_ZoomOriginal_I_1540142.jpg

N9690 Ninja Ice Dipped Gloves

Item#: 1540142
DV_ZoomOriginal_P_38603.jpg

N9690FC Ninja Ice Coated Gloves

Item#: SF13086
DV_ZoomOriginal_I_1654983.jpg

N9691 Cut Resistant Insulated Gloves

Item#: 1654983

Product Description

Keep this versatile Nyloc nut on hand for automotive, mechanical and construction projects. Nylon insert prevents damage to bolt threads, making this lock nut ideal for applications where vibration or movement could cause fasteners to loosen. Use this handy lock nut to secure engine parts, fasten gears and pulleys and connect metal components in structures where vibration might occur.
• Manufactured to IFI Standard 100/107
• Meets SAE Grade 8 strength requirements
• Identified by six symmetrically spaced marks on the chamfered surface on the top of the nut or two circumferential notches on the corners of the nut

Technical Specifications

Item#: 53981
Diameter 3/8 "
Thread Pitch 16
Grade 8
Finish Yellow Zinc
Type Nylon Insert Lock Nut
Material Alloy Steel
Thickness 0.469 "
Across Flats 9/16 "
Thread Coarse
Specifications SAE J995C
Maximum Temperature 350º F
Proof 150,000 PSI
Quantity Per Package 50.0000
UNSPSC #: 31161716
TAA Compliant: No
Weight: 0.9 lb

Product Restrictions

Your Recently Viewed Items