.hide-partial { max-height: none; } .show-more { display: none; }

4-40 Hardware

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Hardware

List Images

Results: 2.928

Applied Filters:

Thread Size = 4-40

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Screws & Fasteners 4-40 .250 SHLDR SCW

2422
Keystone Electronics
1: Rp19.814
499In Stock

Mfr. Part No.
2422

Mouser Part No
534-2422

Keystone Electronics

Screws & Fasteners 4-40 .250 SHLDR SCW

Datasheet

499In Stock

Rp19.814

Rp15.686

Rp14.879

Rp13.319

View

Min.: 1
Mult.: 1

Screws & Fasteners 4-40 .125 SHLDR SOCK

2441
Keystone Electronics
1: Rp32.106
221In Stock

Mfr. Part No.
2441

Mouser Part No
534-2441

Keystone Electronics

Screws & Fasteners 4-40 .125 SHLDR SOCK

Datasheet

221In Stock

Rp32.106

Rp24.400

Rp21.832

Rp19.447

Rp14.493

Min.: 1
Mult.: 1

Screws & Fasteners NYLON KNURL HEAD THUMB SCREW

2500
Keystone Electronics
1: Rp7.522
726In Stock

Mfr. Part No.
2500

Mouser Part No
534-2500

Keystone Electronics

Screws & Fasteners NYLON KNURL HEAD THUMB SCREW

Datasheet

726In Stock

Rp7.522

Rp5.632

Rp5.027

Rp4.256

View

Min.: 1
Mult.: 1

Standoffs & Spacers RND .250X.250 ALUM

3478
Keystone Electronics
1: Rp8.256
2.211In Stock

Mfr. Part No.
3478

Mouser Part No
534-3478

Keystone Electronics

Standoffs & Spacers RND .250X.250 ALUM

Learn More

Datasheet

2.211In Stock

Rp8.256

Rp6.256

Rp5.577

Rp4.733

View

Min.: 1
Mult.: 1

Standoffs & Spacers RND .250X1.50 ALUM

3483
Keystone Electronics
1: Rp27.519
778In Stock

Mfr. Part No.
3483

Mouser Part No
534-3483

Keystone Electronics

Standoffs & Spacers RND .250X1.50 ALUM

Learn More

Datasheet

778In Stock

Rp27.519

Rp22.382

Rp12.604

Rp11.430

Rp10.641

Min.: 1
Mult.: 1

Standoffs & Spacers 4/40 STANDOFF

352
Keystone Electronics
1: Rp48.617
139In Stock

Mfr. Part No.
352

Mouser Part No
534-352

Keystone Electronics

Standoffs & Spacers 4/40 STANDOFF

Datasheet

139In Stock

Rp48.617

Rp39.994

Rp38.710

Rp32.289

View

Min.: 1
Mult.: 1

Screws & Fasteners 4-40 NUT

4694
Keystone Electronics
1: Rp1.835
12.063In Stock

Mfr. Part No.
4694

Mouser Part No
534-4694

Keystone Electronics

Screws & Fasteners 4-40 NUT

Datasheet

12.063In Stock

Rp1.835

Rp1.266

Rp1.119

Rp936

View

Min.: 1
Mult.: 1

Standoffs & Spacers M-F NYLN HEX 6X.50"

4799
Keystone Electronics
1: Rp12.842
395In Stock

Mfr. Part No.
4799

Mouser Part No
534-4799

Keystone Electronics

Standoffs & Spacers M-F NYLN HEX 6X.50"

Learn More

Datasheet

395In Stock

Rp12.842

Rp9.723

Rp8.843

Rp7.504

View

Min.: 1
Mult.: 1

Standoffs & Spacers PC 104 MOUNTING KIT - NYLON

4799-4
Keystone Electronics
1: Rp97.050
191In Stock

Mfr. Part No.
4799-4

Mouser Part No
534-4799-4

Keystone Electronics

Standoffs & Spacers PC 104 MOUNTING KIT - NYLON

Datasheet

191In Stock

Rp97.050

Rp75.952

Rp68.431

Rp63.661

View

Min.: 1
Mult.: 1

Standoffs & Spacers .625l 4-40 x .250

4803
Keystone Electronics
1: Rp11.925
2.590In Stock

Mfr. Part No.
4803

Mouser Part No
534-4803

Keystone Electronics

Standoffs & Spacers .625l 4-40 x .250

Learn More

Datasheet

2.590In Stock

Rp11.925

Rp9.411

Rp8.421

Rp7.137

View

Min.: 1
Mult.: 1

Standoffs & Spacers .250 HEX 3/4L 4-40

4804
Keystone Electronics
1: Rp11.008
4.857In Stock

Mfr. Part No.
4804

Mouser Part No
534-4804

Keystone Electronics

Standoffs & Spacers .250 HEX 3/4L 4-40

Learn More

Datasheet

4.857In Stock

Rp11.008

Rp8.256

Rp7.393

Rp6.256

View

Min.: 1
Mult.: 1

Standoffs & Spacers 1.25 NYL stdoff 4-40 Thread

4808
Keystone Electronics
1: Rp14.126
881In Stock
1.200Expected 05/10/2026

Mfr. Part No.
4808

Mouser Part No
534-4808

Keystone Electronics

Standoffs & Spacers 1.25 NYL stdoff 4-40 Thread

Learn More

Datasheet

881In Stock

1.200Expected 05/10/2026

Rp14.126

Rp10.769

Rp9.650

Rp8.182

View

Min.: 1
Mult.: 1

Standoffs & Spacers M/F HEX STDOFF 1.50"L 4-40 NYLON

4810
Keystone Electronics
1: Rp14.677
1.383In Stock

Mfr. Part No.
4810

Mouser Part No
534-4810

Keystone Electronics

Standoffs & Spacers M/F HEX STDOFF 1.50"L 4-40 NYLON

Learn More

Datasheet

1.383In Stock

Rp14.677

Rp11.118

Rp9.944

Rp8.439

View

Min.: 1
Mult.: 1

Standoffs & Spacers 1.75 NYL stdoff 4-40 Thread

4812
Keystone Electronics
1: Rp15.227
2.050In Stock

Mfr. Part No.
4812

Mouser Part No
534-4812

Keystone Electronics

Standoffs & Spacers 1.75 NYL stdoff 4-40 Thread

Learn More

Datasheet

2.050In Stock

Rp15.227

Rp11.466

Rp10.255

Rp8.714

View

Min.: 1
Mult.: 1

Standoffs & Spacers F/F NYLON STANDOFF 4-40 .750 L

4846
Keystone Electronics
1: Rp24.951
499In Stock

Mfr. Part No.
4846

Mouser Part No
534-4846

Keystone Electronics

Standoffs & Spacers F/F NYLON STANDOFF 4-40 .750 L

Learn More

499In Stock

Rp24.951

Rp19.447

Rp18.346

Rp17.539

View

Min.: 1
Mult.: 1

Standoffs & Spacers RND SS 4-40 X .065

4861
Keystone Electronics
1: Rp19.814
336In Stock

Mfr. Part No.
4861

Mouser Part No
534-4861

Keystone Electronics

Standoffs & Spacers RND SS 4-40 X .065

Datasheet

336In Stock

Rp19.814

Rp15.411

Rp14.989

Rp14.145

View

Min.: 1
Mult.: 1

Standoffs & Spacers Steel Thread Stdoff .375" 4-40 .166/.244

4884
Keystone Electronics
1: Rp15.961
2.339In Stock
4.200Expected 12/10/2026

Mfr. Part No.
4884

Mouser Part No
534-4884

Keystone Electronics

Standoffs & Spacers Steel Thread Stdoff .375" 4-40 .166/.244

Learn More

Datasheet

2.339In Stock

4.200Expected 12/10/2026

Cut Tape

Rp15.961

Rp11.980

Rp10.751

Rp9.118

Reel

Rp8.036

View

Min.: 1
Mult.: 1

: 300

Standoffs & Spacers M/F NYLON STANDOFF 4-40 .250 L

4940
Keystone Electronics
1: Rp13.760
611In Stock

Mfr. Part No.
4940

Mouser Part No
534-4940

Keystone Electronics

Standoffs & Spacers M/F NYLON STANDOFF 4-40 .250 L

Learn More

Datasheet

611In Stock

Rp13.760

Rp10.879

Rp9.723

Rp9.448

View

Min.: 1
Mult.: 1

Standoffs & Spacers ALUM .6" M/F THRD

6799
Keystone Electronics
1: Rp19.997
330In Stock
500On Order

Mfr. Part No.
6799

Mouser Part No
534-6799

Keystone Electronics

Standoffs & Spacers ALUM .6" M/F THRD

Learn More

Datasheet

330In Stock

500On Order

Rp19.997

Rp15.704

Rp15.539

Rp9.210

View

Min.: 1
Mult.: 1

Standoffs & Spacers NB .875 M/F THRD

7201
Keystone Electronics
1: Rp25.684
19In Stock
1.000On Order

Mfr. Part No.
7201

Mouser Part No
534-7201

Keystone Electronics

Standoffs & Spacers NB .875 M/F THRD

Learn More

Datasheet

19In Stock

1.000On Order

Rp25.684

Rp20.731

Rp11.558

Rp10.641

Min.: 1
Mult.: 1

Screws & Fasteners Jack Screw .187 w/hdwr Steel 4-40

7227
Keystone Electronics
1: Rp12.842
174In Stock

Mfr. Part No.
7227

Mouser Part No
534-7227

Keystone Electronics

Screws & Fasteners Jack Screw .187 w/hdwr Steel 4-40

Learn More

Datasheet

174In Stock

Rp12.842

Rp9.760

Rp9.136

Rp8.604

View

Min.: 1
Mult.: 1

Screws & Fasteners JK SCR .250" W/HRDWR

7229
Keystone Electronics
1: Rp13.209
5.508In Stock

Mfr. Part No.
7229

Mouser Part No
534-7229

Keystone Electronics

Screws & Fasteners JK SCR .250" W/HRDWR

Learn More

Datasheet

5.508In Stock

Rp13.209

Rp10.072

Rp9.540

Rp9.136

View

Min.: 1
Mult.: 1

Screws & Fasteners JK SCREW .25" W/HDWR

7229-5
Keystone Electronics
1: Rp15.044
5.357In Stock

Mfr. Part No.
7229-5

Mouser Part No
534-7229-5

Keystone Electronics

Screws & Fasteners JK SCREW .25" W/HDWR

Learn More

Datasheet

5.357In Stock

Rp15.044

Rp11.540

Rp10.934

Rp9.797

View

Min.: 1
Mult.: 1

Screws & Fasteners JACK SCREW .625

7232
Keystone Electronics
1: Rp21.832
326In Stock
750On Order

Mfr. Part No.
7232

Mouser Part No
534-7232

Keystone Electronics

Screws & Fasteners JACK SCREW .625

Learn More

Datasheet

326In Stock

750On Order

Rp21.832

Rp17.264

Rp16.383

Rp14.658

View

Min.: 1
Mult.: 1

Screws & Fasteners JACK SCREW W/HWD.625

7233
Keystone Electronics
1: Rp24.767
1.588In Stock
50On Order

Mfr. Part No.
7233

Mouser Part No
534-7233

Keystone Electronics

Screws & Fasteners JACK SCREW W/HWD.625

Learn More

Datasheet

1.588In Stock

50On Order

Rp24.767

Rp20.548

Rp18.713

Rp18.529

View

Min.: 1
Mult.: 1

4-40 Hardware

Types of Hardware

Customer Service Office

Company

Resources

Support