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AN4 Airframe Bolt, 1/4-28 Thread

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AN4 bolts have a 1/4-28 thread with 0.469 inch thread length except AN4-3A, which has 0.406 inch thread length.

A or no A? AN bolts were originally designed to be used with a castle nut and cotter pin, so the base part number indicates a drilled shank. The addition of an "A" at the end (for example, AN4-13A) indicates an undrilled shank for use with a self-locking nut.

AN bolt nomenclature can be confusing. Please take a look at our page on Identifying AN Bolt Sizes.

Order Qty

Part No.

Desc.

Price

Status

Call for Quote

AN4-3

1/4-28 x 1/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-3A

1/4-28 x 1/16" Grip Airframe Bolt

1 to 11: $0.25

12 to 149: $0.22

150 & up: $0.19

In Stock

AN4-4

1/4-28 x 1/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.34

12 to 149: $0.32

150 & up: $0.29

In Stock

AN4-4A

1/4-28 x 1/16" Grip Airframe Bolt

1 to 11: $0.25

12 to 149: $0.22

150 & up: $0.19

In Stock

AN4-5

1/4-28 x 3/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.34

12 & up: $0.30

In Stock

AN4-5A

1/4-28 x .187 Grip Airframe Bolt

$0.31 In Stock

AN4-6

1/4-28 x 5/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.79

12 & up: $0.71

In Stock

AN4-6A

1/4-28 x .312 Grip Airframe Bolt

1 to 11: $0.39

12 to 149: $0.38

150 & up: $0.37

In Stock

AN4-7

1/4-28 x 7/16" Grip Airframe Bolt, Drilled Shank

$0.35 In Stock

AN4-7A

1/4-28 x .437 Grip Airframe Bolt

1 to 11: $0.39

12 to 149: $0.35

150 & up: $0.30

In Stock

AN4-10

1/4-28 x 9/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.49

12 & up: $0.47

In Stock

AN4-10A

1/4-28 x .562 Grip Airframe Bolt

1 to 11: $0.39

12 to 149: $0.35

150 & up: $0.30

In Stock

AN4-11

1/4-28 x 11/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.39

12 & up: $0.37

In Stock

AN4-11A

1/4-28 x .687 Grip Airframe Bolt

1 to 11: $0.39

12 to 149: $0.35

150 & up: $0.30

In Stock

AN4-12

1/4-28 x 13/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.40

12 & up: $0.36

In Stock

AN4-12A

1/4-28 x .812 Grip Airframe Bolt

1 to 11: $0.39

12 to 149: $0.35

150 & up: $0.30

In Stock

AN4-13

1/4-28 x 15/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.79

12 & up: $0.72

In Stock

AN4-13A

1/4-28 x .937 Grip Airframe Bolt

1 to 11: $0.59

12 to 149: $0.52

150 & up: $0.45

In Stock

AN4-14

1/4-28 x 1 1/16 " Grip Airframe Bolt, Drilled Shank

1 to 11: $0.48

12 & up: $0.46

In Stock

AN4-14A

1/4-28 x 1.062 Grip Airframe Bolt

1 to 11: $0.59

12 to 149: $0.52

150 & up: $0.45

In Stock

AN4-15

1/4-28 x 1 3/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.79

12 & up: $0.71

In Stock

AN4-15A

1/4-28 x 1.187 Grip Airframe Bolt

1 to 11: $0.79

12 & up: $0.70

In Stock

AN4-16

1/4-28 x 1 5/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.69

12 & up: $0.61

In Stock

AN4-16A

1/4-28 x 1.312 Grip Airframe Bolt

1 to 11: $0.54

12 to 149: $0.51

150 & up: $0.48

In Stock

AN4-17

1/4-28 x 1 7/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.99

12 & up: $0.88

In Stock

AN4-17A

1/4-28 x 1.437 Grip Airframe Bolt

1 to 11: $0.54

12 to 149: $0.48

150 & up: $0.41

In Stock

AN4-20

1/4-28 x 1 9/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.64

12 to 149: $0.57

150 & up: $0.49

In Stock

AN4-20A

1/4-28 x 1.562 Grip Airframe Bolt

1 to 11: $0.59

12 & up: $0.53

In Stock
Call for Quote

AN4-21

1/4-28 x 1 11/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-21A

1/4-28 x 1.687 Grip Airframe Bolt

1 to 11: $0.54

12 & up: $0.48

In Stock

AN4-22

1/4-28 x 1 13/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.64

12 to 149: $0.57

150 & up: $0.49

In Stock

AN4-22A

1/4-28 x 1.812 Grip Airframe Bolt

1 to 11: $0.64

12 & up: $0.57

In Stock

AN4-23

1/4-28 x 1 15/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.64

12 & up: $0.57

In Stock

AN4-23A

1/4-28 x 1.937 Grip Airframe Bolt

1 to 11: $0.54

12 & up: $0.48

In Stock
Call for Quote

AN4-24

1/4-28 x 2 1/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-24A

1/4-28 x 2.062 Grip Airframe Bolt

1 to 11: $0.59

12 to 149: $0.52

150 & up: $0.45

In Stock

AN4-25

1/4-28 x 2 3/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.64

12 & up: $0.58

In Stock

AN4-25A

1/4-28 x 2.187 Grip Airframe Bolt

1 to 11: $0.59

12 to 149: $0.52

150 & up: $0.45

In Stock

AN4-26

1/4-28 x 2 5/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.99

12 & up: $0.88

In Stock

AN4-26A

1/4-28 x 2.312 Grip Airframe Bolt

1 to 11: $0.64

12 to 149: $0.58

150 & up: $0.51

In Stock

AN4-27

1/4-28 x 2 7/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.89

12 to 149: $0.79

150 & up: $0.68

In Stock

AN4-27A

1/4-28 x 2.437 Grip Airframe Bolt

1 to 11: $0.79

12 & up: $0.70

In Stock

AN4-30

1/4-28 x 2 9/16" Grip Airframe Bolt, Drilled Shank

1 to 11: $0.89

12 to 149: $0.79

150 & up: $0.68

In Stock

AN4-30A

1/4-28 x 2.562 Grip Airframe Bolt

1 to 11: $0.79

12 & up: $0.70

In Stock
Call for Quote

AN4-31

1/4-28 x 2 11/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-31A

1/4-28 x 2.687 Grip Airframe Bolt

1 to 11: $0.79

12 & up: $0.72

In Stock
Call for Quote

AN4-32

1/4-28 x 2 13/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-32A

1/4-28 x 2.812 Grip Airframe Bolt

1 to 11: $0.99

12 & up: $0.88

In Stock
Call for Quote

AN4-33

1/4-28 x 2 15/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-33A

1/4-28 x 2.937 Grip Airframe Bolt

1 to 9: $1.19

10 & up: $1.06

In Stock

AN4-34

1/4-28 x 3 1/16" Grip Airframe Bolt, Drilled Shank

1 to 9: $1.89

10 & up: $1.68

In Stock

AN4-34A

1/4-28 x 3.062 Grip Airframe Bolt

1 to 9: $1.39

10 & up: $1.24

In Stock

AN4-35

1/4-28 x 3 3/16" Grip Airframe Bolt, Drilled Shank

1 to 9: $1.89

10 & up: $1.68

In Stock

AN4-35A

1/4-28 x 3.187 Grip Airframe Bolt

1 to 9: $1.39

10 & up: $1.24

In Stock
Call for Quote

AN4-36

1/4-28 x 3 5/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-36A

1/4-28 x 3.312 Grip Airframe Bolt

1 to 9: $1.59

10 to 99: $1.41

100 & up: $1.23

In Stock
Call for Quote

AN4-37

1/4-28 x 3 7/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-37A

1/4-28 x 3 7/16" Grip Airframe Bolt

1 to 9: $1.59

10 & up: $1.41

In Stock

AN4-40

1/4-28 x 3 9/16" Grip Airframe Bolt, Drilled Shank

1 to 9: $2.19

10 & up: $1.95

In Stock

AN4-40A

1/4-28 x 3 9/16" Grip Airframe Bolt

1 to 9: $1.59

10 & up: $1.45

In Stock

AN4-41

1/4-28 x 3 11/16" Grip Airframe Bolt, Drilled Shank

1 to 9: $2.29

10 & up: $2.04

In Stock

AN4-41A

1/4-28 x 3 11/16" Grip Airframe Bolt

1 to 9: $1.59

10 & up: $1.41

In Stock

AN4-42

1/4-28 x 3 13/16" Grip Airframe Bolt, Drilled Shank

1 to 9: $2.29

10 & up: $2.04

In Stock

AN4-42A

1/4-28 x 3 13/16" Grip Airframe Bolt

1 to 9: $1.79

10 & up: $1.59

In Stock
Call for Quote

AN4-43

1/4-28 x 3 15/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-43A

1/4-28 x 3 15/16" Grip Airframe Bolt

1 to 9: $1.89

10 & up: $1.68

In Stock
Call for Quote

AN4-44

1/4-28 x 4 1/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available
Call for Quote

AN4-44A

1/4-28 x 4 1/16" Grip Airframe Bolt

Call for Quote Not In Stock
notify me when available
Call for Quote

AN4-45

1/4-28 x 4 3/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-45A

1/4-28 x 4 3/16" Grip Airframe Bolt

1 to 9: $1.89

10 & up: $1.68

In Stock
Call for Quote

AN4-46

1/4-28 x 4 5/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-46A

1/4-28 x 4 5/16" Grip Airframe Bolt

1 to 9: $1.89

10 to 99: $1.68

100 & up: $1.47

In Stock
Call for Quote

AN4-47

1/4-28 x 4 7/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-47A

1/4-28 x 4 7/16" Grip Airframe Bolt

1 to 9: $2.29

10 to 99: $2.04

100 & up: $1.79

In Stock
Call for Quote

AN4-50

1/4-28 x 4 9/16" Grip Airframe Bolt, Drilled Shank

Call for Quote Not In Stock
notify me when available

AN4-50A

1/4-28 x 4 9/16" Grip Airframe Bolt

1 to 7: $3.69

8 to 59: $3.31

60 & up: $2.92

In Stock

AN4-56A

1/4-28 x 5 5/16" Grip Airframe Bolt

1 to 7: $4.99

8 to 59: $4.50

60 & up: $4.00

In Stock