.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: 2,927

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 1/2 4-40 NYLON BND

9429
Keystone Electronics
1: $0.218
526In Stock

Mfr. Part No.
9429

Mouser Part No
534-9429

Keystone Electronics

Screws & Fasteners 1/2 4-40 NYLON BND

Datasheet

526In Stock

$0.218

$0.163

$0.144

$0.122

View

Min.: 1
Mult.: 1

Screws & Fasteners 5/8 4-40 NYLON BND

9430
Keystone Electronics
1: $0.231
746In Stock

Mfr. Part No.
9430

Mouser Part No
534-9430

Keystone Electronics

Screws & Fasteners 5/8 4-40 NYLON BND

Datasheet

746In Stock

$0.231

$0.174

$0.155

$0.131

View

Min.: 1
Mult.: 1

Screws & Fasteners 3/4 4-40 STEEL FLAT

9504
Keystone Electronics
1: $0.326
935In Stock

Mfr. Part No.
9504

Mouser Part No
534-9504

Keystone Electronics

Screws & Fasteners 3/4 4-40 STEEL FLAT

Datasheet

935In Stock

$0.326

$0.253

$0.226

$0.19

View

Min.: 1
Mult.: 1

Screws & Fasteners 1/4 4-40 NYLON FLAT

9527
Keystone Electronics
1: $0.204
871In Stock

Mfr. Part No.
9527

Mouser Part No
534-9527

Keystone Electronics

Screws & Fasteners 1/4 4-40 NYLON FLAT

Datasheet

871In Stock

$0.204

$0.152

$0.136

$0.114

View

Min.: 1
Mult.: 1

Screws & Fasteners 3/8 4-40 NYLON FLAT

9528
Keystone Electronics
1: $0.218
7,024In Stock

Mfr. Part No.
9528

Mouser Part No
534-9528

Keystone Electronics

Screws & Fasteners 3/8 4-40 NYLON FLAT

Datasheet

7,024In Stock

$0.218

$0.171

$0.152

$0.128

View

Min.: 1
Mult.: 1

Screws & Fasteners 1/2 4-40 NYLON FLAT

9529
Keystone Electronics
1: $0.218
1,086In Stock

Mfr. Part No.
9529

Mouser Part No
534-9529

Keystone Electronics

Screws & Fasteners 1/2 4-40 NYLON FLAT

Datasheet

1,086In Stock

$0.218

$0.163

$0.144

$0.122

View

Min.: 1
Mult.: 1

Screws & Fasteners 1" 4-40 NYLON FLAT

9532
Keystone Electronics
1: $0.245
861In Stock

Mfr. Part No.
9532

Mouser Part No
534-9532

Keystone Electronics

Screws & Fasteners 1" 4-40 NYLON FLAT

Datasheet

861In Stock

$0.245

$0.209

$0.18

$0.148

View

Min.: 1
Mult.: 1

Standoffs & Spacers PC 104 MOUNTING KIT ALUMINUM

PC104-AL
Keystone Electronics
1: $18.60
24In Stock

Mfr. Part No.
PC104-AL

Mouser Part No
534-PC104-AL

Keystone Electronics

Standoffs & Spacers PC 104 MOUNTING KIT ALUMINUM

Datasheet

24In Stock

$18.60

$14.62

$13.31

$12.72

View

Min.: 1
Mult.: 1

Standoffs & Spacers PC 104 MOUNTING KIT STAINLESS STL

PC104-SS
Keystone Electronics
1: $15.61
7In Stock

Mfr. Part No.
PC104-SS

Mouser Part No
534-PC104-SS

Keystone Electronics

Standoffs & Spacers PC 104 MOUNTING KIT STAINLESS STL

Datasheet

7In Stock

$15.61

$11.87

$11.38

$11.10

Min.: 1
Mult.: 1

Screws & Fasteners 21/32 LNGTH 5/16 DIA 4-40 THRD CAP SCREW

0100-SS
RAF Electronic Hardware
1: $2.57
169In Stock

Mfr. Part No.
0100-SS

Mouser Part No
761-0100-SS

RAF Electronic Hardware

Screws & Fasteners 21/32 LNGTH 5/16 DIA 4-40 THRD CAP SCREW

Datasheet

169In Stock

$2.57

$2.41

$2.08

$1.97

$1.85

Min.: 1
Mult.: 1

Screws & Fasteners 9/16 LNGTH 1/4 DIA 4-40 THRD CAP SCREW

0370-SS
RAF Electronic Hardware
1: $3.81
5In Stock

Mfr. Part No.
0370-SS

Mouser Part No
761-0370-SS

RAF Electronic Hardware

Screws & Fasteners 9/16 LNGTH 1/4 DIA 4-40 THRD CAP SCREW

Datasheet

5In Stock

$3.81

$3.24

$3.22

$2.86

$2.84

Min.: 1
Mult.: 1

Screws & Fasteners 1/4HD X 3/4 X 4-40 Thd Captive Panel Screw Style 2

0373-SS
RAF Electronic Hardware
1: $3.79
56In Stock

Mfr. Part No.
0373-SS

Mouser Part No
761-0373-SS

RAF Electronic Hardware

Screws & Fasteners 1/4HD X 3/4 X 4-40 Thd Captive Panel Screw Style 2

Datasheet

56In Stock

$3.79

$3.56

$3.28

$3.24

$3.20

Min.: 1
Mult.: 1

Screws & Fasteners 5/8 LNGTH 5/16 DIA 4-40 THRD CAP SCREW

0382-SS
RAF Electronic Hardware
1: $2.50
102In Stock

Mfr. Part No.
0382-SS

Mouser Part No
761-0382-SS

RAF Electronic Hardware

Screws & Fasteners 5/8 LNGTH 5/16 DIA 4-40 THRD CAP SCREW

Datasheet

102In Stock

$2.50

$2.34

$2.03

$1.92

Min.: 1
Mult.: 1

Screws & Fasteners 3//8 LNGTH 11/64 DIA 4-40 THRD CAP SCREW

0819-SS
RAF Electronic Hardware
1: $1.51
195In Stock
630On Order

Mfr. Part No.
0819-SS

Mouser Part No
761-0819-SS

RAF Electronic Hardware

Screws & Fasteners 3//8 LNGTH 11/64 DIA 4-40 THRD CAP SCREW

Datasheet

195In Stock

630On Order

$1.51

$1.40

$1.22

$1.15

$1.08

Min.: 1
Mult.: 1

Screws & Fasteners 7/16 LNGTH 11/64 DIA 4-40 THRD CAP SCREW

0820-SS
RAF Electronic Hardware
1: $1.81
229In Stock

Mfr. Part No.
0820-SS

Mouser Part No
761-0820-SS

RAF Electronic Hardware

Screws & Fasteners 7/16 LNGTH 11/64 DIA 4-40 THRD CAP SCREW

Datasheet

229In Stock

$1.81

$1.80

$1.70

$1.66

Min.: 1
Mult.: 1

Screws & Fasteners 1/2 LNGTH 11/64 DIA 4-40 THRD CAP SCREW

0821-SS
RAF Electronic Hardware
1: $1.60
364In Stock

Mfr. Part No.
0821-SS

Mouser Part No
761-0821-SS

RAF Electronic Hardware

Screws & Fasteners 1/2 LNGTH 11/64 DIA 4-40 THRD CAP SCREW

Datasheet

364In Stock

$1.60

$1.50

$1.33

$1.26

$1.17

Min.: 1
Mult.: 1

Screws & Fasteners 5/8 LNGTH 11/64 DIA 4-40 THRD CAP SCREW

0823-SS
RAF Electronic Hardware
1: $2.20
35In Stock
120Expected 8/9/2026

Mfr. Part No.
0823-SS

Mouser Part No
761-0823-SS

RAF Electronic Hardware

Screws & Fasteners 5/8 LNGTH 11/64 DIA 4-40 THRD CAP SCREW

Datasheet

35In Stock

120Expected 8/9/2026

$2.20

$2.08

$1.93

$1.92

Min.: 1
Mult.: 1

Screws & Fasteners 1/4OD X 4-40 Thd Panel Screw Retainer

1000-050-SS
RAF Electronic Hardware
1: $1.48
217In Stock

Mfr. Part No.
1000-050-SS

Mouser Part No
761-1000-050-SS

RAF Electronic Hardware

Screws & Fasteners 1/4OD X 4-40 Thd Panel Screw Retainer

Datasheet

217In Stock

$1.48

$1.39

$1.20

$1.13

Min.: 1
Mult.: 1

Standoffs & Spacers SS 4-40 1/8in 3/16in Round FEM Standoff

1631-440-SS
RAF Electronic Hardware
1: $1.07
202In Stock
154Expected 22/9/2026

Mfr. Part No.
1631-440-SS

Mouser Part No
761-1631-440-SS

RAF Electronic Hardware

Standoffs & Spacers SS 4-40 1/8in 3/16in Round FEM Standoff

Datasheet

202In Stock

154Expected 22/9/2026

$1.07

$0.936

$0.743

$0.698

View

Min.: 1
Mult.: 1

Standoffs & Spacers SS 4-40 3/16in Round FEM Standoff

1632-440-SS
RAF Electronic Hardware
1: $2.83
148In Stock

Mfr. Part No.
1632-440-SS

Mouser Part No
761-1632-440-SS

RAF Electronic Hardware

Standoffs & Spacers SS 4-40 3/16in Round FEM Standoff

Datasheet

148In Stock

$2.83

$2.11

$1.71

$1.67

View

Min.: 1
Mult.: 1

Standoffs & Spacers AL 4-40 5/16in Round FEM Standoff

1634-440-AL
RAF Electronic Hardware
1: $0.762
29In Stock

Mfr. Part No.
1634-440-AL

Mouser Part No
761-1634-440-AL

RAF Electronic Hardware

Standoffs & Spacers AL 4-40 5/16in Round FEM Standoff

Datasheet

29In Stock

$0.762

$0.69

$0.52

$0.458

View

Min.: 1
Mult.: 1

Standoffs & Spacers AL 4-40 3/8in 3/16in Round FEM Standoff

1635-440-AL
RAF Electronic Hardware
1: $0.558
473In Stock

Mfr. Part No.
1635-440-AL

Mouser Part No
761-1635-440-AL

RAF Electronic Hardware

Standoffs & Spacers AL 4-40 3/8in 3/16in Round FEM Standoff

Datasheet

473In Stock

$0.558

$0.449

$0.374

$0.336

View

Min.: 1
Mult.: 1

Standoffs & Spacers AL 4-40 7/16in Round FEM Standoff

1636-440-AL
RAF Electronic Hardware
1: $1.14
1,176In Stock

Mfr. Part No.
1636-440-AL

Mouser Part No
761-1636-440-AL

RAF Electronic Hardware

Standoffs & Spacers AL 4-40 7/16in Round FEM Standoff

Datasheet

1,176In Stock

$1.14

$0.834

$0.766

Min.: 1
Mult.: 1

Standoffs & Spacers SS 4-40 7/16in Round FEM Standoff

1636-440-SS
RAF Electronic Hardware
1: $1.24
34In Stock

Mfr. Part No.
1636-440-SS

Mouser Part No
761-1636-440-SS

RAF Electronic Hardware

Standoffs & Spacers SS 4-40 7/16in Round FEM Standoff

Datasheet

34In Stock

$1.24

$0.996

$0.794

$0.747

View

Min.: 1
Mult.: 1

Standoffs & Spacers AL 4-40 1in 3/16in Round FEM Standoff

1645-440-AL
RAF Electronic Hardware
1: $1.21
31In Stock

Mfr. Part No.
1645-440-AL

Mouser Part No
761-1645-440-AL

RAF Electronic Hardware

Standoffs & Spacers AL 4-40 1in 3/16in Round FEM Standoff

Datasheet

31In Stock

$1.21

$0.932

$0.759

$0.683

View

Min.: 1
Mult.: 1

4-40 Hardware

Types of Hardware

Customer Service Office

Company

Resources

Support