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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.

Enter desired order quantities below, then click the "Add selected quantities to cart" button.

Order Qty
Part No.
Desc.
Price
Status

AN4-3

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

1 to 11: $0.64

12 to 149: $0.57

150 to 1999: $0.49

2000 & up: call   

In Stock

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

$0.31In 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: $0.35

150 to 1999: $0.30

2000 & up: call   

In Stock

AN4-7

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

$0.35In Stock

AN4-7A

1/4-28 x .437 Grip Airframe Bolt

1 to 11: $0.39

12 to 149: $0.35

150 to 1999: $0.30

2000 & up: call   

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 to 1999: $0.30

2000 & up: call   

In Stock

AN4-11

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

1 to 11: $0.39

12 to 149: $0.38

150 to 1999: $0.37

2000 & up: call   

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: $0.69

12 & up: $0.62

In Stock

AN4-12A

1/4-28 x .812 Grip Airframe Bolt

1 to 11: $0.39

12 to 149: $0.35

150 to 1999: $0.30

2000 & up: call   

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 to 149: $0.70

150 & up: $0.60

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 & up: $0.51

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

AN4-21

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

1 to 11: $0.94

12 to 149: $0.83

150 to 1999: $0.72

2000 & up: call   

In Stock

AN4-21A

1/4-28 x 1.687 Grip Airframe Bolt

1 to 11: $0.54

12 to 149: $0.48

150 to 1999: $0.41

2000 & up: call   

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

AN4-24

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

1 to 9: $1.09

10 to 99: $0.97

100 to 999: $0.84

1000 & up: call   

In Stock

AN4-24A

1/4-28 x 2.062 Grip Airframe Bolt

1 to 11: $0.59

12 & up: $0.52

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

AN4-31

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

1 to 9: $1.19

10 to 99: $1.06

100 to 999: $0.92

1000 & up: call   

In Stock

AN4-31A

1/4-28 x 2.687 Grip Airframe Bolt

1 to 11: $0.79

12 to 149: $0.70

150 & up: $0.60

In Stock

AN4-32

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

1 to 9: $1.29

10 to 99: $1.15

100 to 999: $1.00

1000 & up: call   

In Stock

AN4-32A

1/4-28 x 2.812 Grip Airframe Bolt

1 to 11: $0.99

12 & up: $0.88

In Stock

AN4-33

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

1 to 9: $1.29

10 to 99: $1.15

100 to 999: $1.00

1000 & up: call   

In Stock

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

AN4-36

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

1 to 9: $1.39

10 to 99: $1.24

100 to 999: $1.08

1000 & up: call   

In Stock

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

AN4-37

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

1 to 9: $1.39

10 to 99: $1.24

100 to 999: $1.08

1000 & up: call   

In Stock

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

AN4-43

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

1 to 9: $1.59

10 to 99: $1.41

100 & up: $1.23

In Stock

AN4-43A

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

1 to 9: $1.89

10 & up: $1.68

In Stock

AN4-44

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

1 to 9: $1.69

10 to 99: $1.50

100 & up: $1.31

In Stock

AN4-44A

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

1 to 9: $1.29

10 to 99: $1.15

100 & up: $1.00

In Stock

AN4-45

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

1 to 9: $1.79

10 to 99: $1.59

100 & up: $1.39

In Stock

AN4-45A

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

1 to 9: $1.89

10 & up: $1.68

In Stock

AN4-46

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

1 to 9: $1.79

10 to 99: $1.59

100 & up: $1.39

In Stock

AN4-46A

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

1 to 9: $1.89

10 & up: $1.68

In Stock
Call for Quote

AN4-47

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

Call for QuoteNot 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 QuoteNot 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

AN4-51A

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

1 to 9: $2.29

10 to 99: $2.04

100 & up: $1.79

In Stock

AN4-52A

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

1 to 9: $2.99

10 to 99: $2.67

100 & up: $2.35

In Stock

AN4-53A

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

1 to 7: $3.49

8 to 59: $3.13

60 & up: $2.76

In Stock

AN4-54A

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

1 to 7: $3.99

8 to 59: $3.58

60 & up: $3.16

In Stock

AN4-55A

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

1 to 7: $4.49

8 to 59: $4.03

60 & up: $3.57

In Stock

AN4-56A

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

1 to 7: $4.99

8 to 59: $4.48

60 & up: $3.97

In Stock

AN4-57A

1/4-28 x 5 7/16" Grip Airframe Bolt

1 to 7: $5.49

8 to 59: $4.94

60 & up: $4.38

In Stock

AN4-61A

1/4-28 x 5 11/16" Grip Airframe Bolt

1 to 7: $5.99

8 & up: $5.39

In Stock

AN4-62A

1/4-28 x 5 13/16" Grip Airframe Bolt

1 to 7: $6.49

8 & up: $5.85

In Stock

AN4-64A

1/4-28 x 6 1/16" Grip Airframe Bolt

1 to 7: $5.99

8 & up: $5.39

In Stock

AN4-65A

1/4-28 x 6 3/16" Grip Airframe Bolt

1 to 7: $6.49

8 & up: $5.85

In Stock

AN4-67A

1/4-28 x 6 7/16" Grip Airframe Bolt

1 to 7: $7.49

8 & up: $6.76

In Stock

AN4-70A

1/4-28 x 6 9/16" Grip Airframe Bolt

1 to 7: $8.49

8 & up: $7.67

In Stock

AN4-72A

1/4-28 x 6 13/16" Grip Airframe Bolt

1 to 5: $10.49

6 to 35: $9.49

36 & up: $8.49

In Stock

AN4-73A

1/4-28 x 6 15/16" Grip Airframe Bolt

1 to 5: $10.99

6 & up: $9.95

In Stock

AN4-74A

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

1 to 5: $11.49

6 & up: $10.41

In Stock

AN4-80A

1/4-28 x 7 9/16" Grip Airframe Bolt

1 to 5: $12.29

6 & up: $11.14

In Stock