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AN4 Airframe Bolt, 1/4-28 Thread

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AN4 bolts have a 1/4-28 UNF thread. All sizes of AN4 bolts have a 0.469 inch thread length (except AN4-3A, which has 0.406 inch thread length). The thread length is designed specifically to fit a full-height nut plus one AN960-416 washer.

Grip Length refers to the length of the unthreaded portion of the shank. Grip lengths are available in 1/8" increments to match the thickness of the materials being bolted together (the threaded portion should never be positioned inside the hole). If your assembly is between sizes, select the next longer bolt and use additional AN960-416 and AN960-416L washers to take up the slack.

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.

UHL: Under Head Length (also known as Full Shank Length or Overall Length not including bolt head)

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
Condition: New

1/4-28 x 0.063 Grip Airframe Bolt, 0.47 UHL, Drilled Shank

1 to 11: $0.64

12 to 149: $0.57

150 to 1999: $0.49

2000 & up: call   

In Stock

AN4-3A
Condition: New

1/4-28 x 0.063 Grip Airframe Bolt, 0.47 UHL, undrilled

1 to 11: $0.25

12 to 149: $0.22

150 & up: $0.19

In Stock

AN4-4
Condition: New

1/4-28 x 0.063 Grip Airframe Bolt, 0.53 UHL, Drilled Shank

1 to 11: $0.34

12 & up: $0.32

In Stock

AN4-4A
Condition: New

1/4-28 x 0.063 Grip Airframe Bolt, 0.53 UHL, undrilled

1 to 11: $0.25

12 to 149: $0.22

150 to 1999: $0.19

2000 & up: call   

In Stock

AN4-5
Condition: New

1/4-28 x 0.188 Grip Airframe Bolt, 0.66 UHL, Drilled Shank

1 to 11: $0.37

12 to 149: $0.35

150 to 1999: $0.33

2000 & up: call   

In Stock

AN4-5A
Condition: New

1/4-28 x 0.188 Grip Airframe Bolt, 0.66 UHL, undrilled

1 to 11: $0.31

12 to 149: $0.27

150 to 1999: $0.23

2000 & up: call   

In Stock

AN4-6
Condition: New

1/4-28 x 0.313 Grip Airframe Bolt, 0.78 UHL, Drilled Shank

1 to 11: $0.79

12 & up: $0.71

In Stock

AN4-6A
Condition: New

1/4-28 x 0.313 Grip Airframe Bolt, 0.78 UHL, undrilled

1 to 11: $0.39

12 to 149: $0.35

150 to 1999: $0.30

2000 & up: call   

In Stock

AN4-7
Condition: New

1/4-28 x 0.438 Grip Airframe Bolt, 0.91 UHL, Drilled Shank

1 to 11: $0.39

12 & up: $0.38

In Stock

AN4-7A
Condition: New

1/4-28 x 0.438 Grip Airframe Bolt, 0.91 UHL, undrilled

1 to 11: $0.39

12 to 149: $0.35

150 to 1999: $0.30

2000 & up: call   

In Stock

AN4-10
Condition: New

1/4-28 x 0.563 Grip Airframe Bolt, 1.03 UHL, Drilled Shank

1 to 11: $0.54

12 & up: $0.50

In Stock

AN4-10A
Condition: New

1/4-28 x 0.563 Grip Airframe Bolt, 1.03 UHL, undrilled

1 to 11: $0.39

12 to 149: $0.35

150 to 1999: $0.30

2000 & up: call   

In Stock

AN4-11
Condition: New

1/4-28 x 0.688 Grip Airframe Bolt, 1.16 UHL, Drilled Shank

1 to 11: $0.43

12 to 149: $0.41

150 to 1999: $0.38

2000 & up: call   

In Stock

AN4-11A
Condition: New

1/4-28 x 0.688 Grip Airframe Bolt, 1.16 UHL, undrilled

1 to 11: $0.39

12 to 149: $0.35

150 to 1999: $0.30

2000 & up: call   

In Stock

AN4-12
Condition: New

1/4-28 x 0.813 Grip Airframe Bolt, 1.28 UHL, Drilled Shank

1 to 11: $0.69

12 & up: $0.62

In Stock

AN4-12A
Condition: New

1/4-28 x 0.813 Grip Airframe Bolt, 1.28 UHL, undrilled

1 to 11: $0.39

12 to 149: $0.35

150 & up: $0.30

In Stock

AN4-13
Condition: New

1/4-28 x 0.938 Grip Airframe Bolt, 1.41 UHL, Drilled Shank

1 to 11: $0.79

12 & up: $0.72

In Stock

AN4-13A
Condition: New

1/4-28 x 0.938 Grip Airframe Bolt, 1.41 UHL, undrilled

1 to 11: $0.59

12 to 149: $0.52

150 to 1999: $0.45

2000 & up: call   

In Stock

AN4-14
Condition: New

1/4-28 x 1.063 Grip Airframe Bolt, 1.53 UHL, Drilled Shank

1 to 11: $0.54

12 to 149: $0.50

150 to 1999: $0.45

2000 & up: call   

In Stock

AN4-14A
Condition: New

1/4-28 x 1.063 Grip Airframe Bolt, 1.53 UHL, undrilled

1 to 11: $0.59

12 to 149: $0.52

150 to 1999: $0.45

2000 & up: call   

In Stock

AN4-15
Condition: New

1/4-28 x 1.188 Grip Airframe Bolt, 1.66 UHL, Drilled Shank

1 to 11: $0.79

12 & up: $0.71

In Stock

AN4-15A
Condition: New

1/4-28 x 1.188 Grip Airframe Bolt, 1.66 UHL, undrilled

1 to 11: $0.79

12 to 149: $0.70

150 & up: $0.60

In Stock

AN4-16
Condition: New

1/4-28 x 1.313 Grip Airframe Bolt, 1.78 UHL, Drilled Shank

1 to 11: $0.69

12 to 149: $0.61

150 to 1999: $0.53

2000 & up: call   

In Stock

AN4-16A
Condition: New

1/4-28 x 1.313 Grip Airframe Bolt, 1.78 UHL, undrilled

1 to 11: $0.54

12 to 149: $0.48

150 to 1999: $0.41

2000 & up: call   

In Stock

AN4-17
Condition: New

1/4-28 x 1.438 Grip Airframe Bolt, 1.91 UHL, Drilled Shank

1 to 11: $0.99

12 & up: $0.88

In Stock

AN4-17A
Condition: New

1/4-28 x 1.438 Grip Airframe Bolt, 1.91 UHL, undrilled

1 to 11: $0.54

12 & up: $0.48

In Stock

AN4-20
Condition: New

1/4-28 x 1.563 Grip Airframe Bolt, 2.03 UHL, Drilled Shank

1 to 11: $0.64

12 to 149: $0.57

150 & up: $0.49

In Stock

AN4-20A
Condition: New

1/4-28 x 1.563 Grip Airframe Bolt, 2.03 UHL, undrilled

1 to 11: $0.59

12 to 149: $0.52

150 to 1999: $0.45

2000 & up: call   

In Stock

AN4-21
Condition: New

1/4-28 x 1.688 Grip Airframe Bolt, 2.16 UHL, Drilled Shank

1 to 11: $0.94

12 to 149: $0.83

150 to 1999: $0.72

2000 & up: call   

In Stock

AN4-21A
Condition: New

1/4-28 x 1.688 Grip Airframe Bolt, 2.16 UHL, undrilled

1 to 11: $0.54

12 to 149: $0.48

150 to 1999: $0.41

2000 & up: call   

In Stock

AN4-22
Condition: New

1/4-28 x 1.813 Grip Airframe Bolt, 2.28 UHL, Drilled Shank

1 to 11: $0.64

12 to 149: $0.57

150 & up: $0.49

In Stock

AN4-22A
Condition: New

1/4-28 x 1.813 Grip Airframe Bolt, 2.28 UHL, undrilled

1 to 11: $0.64

12 to 149: $0.57

150 to 1999: $0.49

2000 & up: call   

In Stock

AN4-23
Condition: New

1/4-28 x 1.938 Grip Airframe Bolt, 2.41 UHL, Drilled Shank

1 to 11: $0.64

12 & up: $0.57

In Stock

AN4-23A
Condition: New

1/4-28 x 1.938 Grip Airframe Bolt, 2.41 UHL, undrilled

1 to 11: $0.54

12 to 149: $0.48

150 to 1999: $0.41

2000 & up: call   

In Stock

AN4-24
Condition: New

1/4-28 x 2.063 Grip Airframe Bolt, 2.53 UHL, Drilled Shank

1 to 9: $1.09

10 to 99: $0.97

100 to 999: $0.84

1000 & up: call   

In Stock

AN4-24A
Condition: New

1/4-28 x 2.063 Grip Airframe Bolt, 2.53 UHL, undrilled

1 to 11: $0.59

12 & up: $0.52

In Stock

AN4-25
Condition: New

1/4-28 x 2.188 Grip Airframe Bolt, 2.66 UHL, Drilled Shank

1 to 11: $0.64

12 & up: $0.58

In Stock

AN4-25A
Condition: New

1/4-28 x 2.188 Grip Airframe Bolt, 2.66 UHL, undrilled

1 to 11: $0.59

12 to 149: $0.52

150 & up: $0.45

In Stock

AN4-26
Condition: New

1/4-28 x 2.313 Grip Airframe Bolt, 2.78 UHL, Drilled Shank

1 to 11: $0.99

12 & up: $0.88

In Stock

AN4-26A
Condition: New

1/4-28 x 2.313 Grip Airframe Bolt, 2.78 UHL, undrilled

1 to 11: $0.64

12 to 149: $0.58

150 & up: $0.51

In Stock

AN4-27
Condition: New

1/4-28 x 2.438 Grip Airframe Bolt, 2.91 UHL, Drilled Shank

1 to 11: $0.89

12 to 149: $0.79

150 & up: $0.68

In Stock

AN4-27A
Condition: New

1/4-28 x 2.438 Grip Airframe Bolt, 2.91 UHL, undrilled

1 to 11: $0.79

12 & up: $0.70

In Stock

AN4-30
Condition: New

1/4-28 x 2.563 Grip Airframe Bolt, 3.03 UHL, Drilled Shank

1 to 11: $0.89

12 to 149: $0.79

150 & up: $0.68

In Stock

AN4-30A
Condition: New

1/4-28 x 2.563 Grip Airframe Bolt, 3.03 UHL, undrilled

1 to 11: $0.79

12 to 149: $0.70

150 & up: $0.60

In Stock

AN4-31
Condition: New

1/4-28 x 2.688 Grip Airframe Bolt, 3.16 UHL, Drilled Shank

1 to 9: $1.19

10 to 99: $1.06

100 & up: $0.92

In Stock

AN4-31A
Condition: New

1/4-28 x 2.688 Grip Airframe Bolt, 3.16 UHL, undrilled

1 to 11: $0.79

12 to 149: $0.70

150 & up: $0.60

In Stock

AN4-32
Condition: New

1/4-28 x 2.813 Grip Airframe Bolt, 3.28 UHL, Drilled Shank

1 to 9: $1.29

10 to 99: $1.15

100 to 999: $1.00

1000 & up: call   

In Stock

AN4-32A
Condition: New

1/4-28 x 2.813 Grip Airframe Bolt, 3.28 UHL, undrilled

1 to 11: $0.99

12 & up: $0.88

In Stock

AN4-33
Condition: New

1/4-28 x 2.938 Grip Airframe Bolt, 3.41 UHL, Drilled Shank

1 to 9: $1.29

10 to 99: $1.15

100 to 999: $1.00

1000 & up: call   

In Stock

AN4-33A
Condition: New

1/4-28 x 2.938 Grip Airframe Bolt, 3.41 UHL, undrilled

1 to 9: $1.19

10 & up: $1.06

In Stock

AN4-34
Condition: New

1/4-28 x 3.063 Grip Airframe Bolt, 3.53 UHL, Drilled Shank

1 to 9: $1.89

10 & up: $1.68

In Stock

AN4-34A
Condition: New

1/4-28 x 3.063 Grip Airframe Bolt, 3.53 UHL, undrilled

1 to 9: $1.39

10 & up: $1.24

In Stock

AN4-35
Condition: New

1/4-28 x 3.188 Grip Airframe Bolt, 3.66 UHL, Drilled Shank

1 to 9: $1.89

10 & up: $1.68

In Stock

AN4-35A
Condition: New

1/4-28 x 3.188 Grip Airframe Bolt, 3.66 UHL, undrilled

1 to 9: $1.39

10 & up: $1.24

In Stock

AN4-36
Condition: New

1/4-28 x 3.313 Grip Airframe Bolt, 3.78 UHL, Drilled Shank

1 to 9: $1.39

10 to 99: $1.24

100 & up: $1.08

In Stock

AN4-36A
Condition: New

1/4-28 x 3.313 Grip Airframe Bolt, 3.78 UHL, undrilled

1 to 9: $1.59

10 & up: $1.41

In Stock

AN4-37
Condition: New

1/4-28 x 3.438 Grip Airframe Bolt, 3.91 UHL, Drilled Shank

1 to 9: $1.39

10 to 99: $1.24

100 & up: $1.08

In Stock

AN4-37A
Condition: New

1/4-28 x 3.438 Grip Airframe Bolt, 3.91 UHL, undrilled

1 to 9: $1.59

10 & up: $1.41

In Stock

AN4-40
Condition: New

1/4-28 x 3.563 Grip Airframe Bolt, 4.03 UHL, Drilled Shank

1 to 9: $2.19

10 & up: $1.95

In Stock

AN4-40A
Condition: New

1/4-28 x 3.563 Grip Airframe Bolt, 4.03 UHL, undrilled

1 to 9: $1.59

10 & up: $1.45

In Stock

AN4-41
Condition: New

1/4-28 x 3.688 Grip Airframe Bolt, 4.16 UHL, Drilled Shank

1 to 9: $2.29

10 & up: $2.04

In Stock

AN4-41A
Condition: New

1/4-28 x 3.688 Grip Airframe Bolt, 4.16 UHL, undrilled

1 to 9: $1.59

10 & up: $1.41

In Stock

AN4-42
Condition: New

1/4-28 x 3.813 Grip Airframe Bolt, 4.28 UHL, Drilled Shank

1 to 9: $2.29

10 & up: $2.04

In Stock

AN4-42A
Condition: New

1/4-28 x 3.813 Grip Airframe Bolt, 4.28 UHL, undrilled

1 to 9: $1.79

10 & up: $1.59

In Stock

AN4-43
Condition: New

1/4-28 x 3.938 Grip Airframe Bolt, 4.41 UHL, Drilled Shank

1 to 9: $1.59

10 to 99: $1.41

100 & up: $1.23

In Stock

AN4-43A
Condition: New

1/4-28 x 3.938 Grip Airframe Bolt, 4.41 UHL, undrilled

1 to 9: $1.89

10 & up: $1.68

In Stock

AN4-44
Condition: New

1/4-28 x 4.063 Grip Airframe Bolt, 4.53 UHL, Drilled Shank

1 to 9: $1.69

10 to 99: $1.50

100 & up: $1.31

In Stock

AN4-44A
Condition: New

1/4-28 x 4.063 Grip Airframe Bolt, 4.53 UHL, undrilled

1 to 9: $1.29

10 to 99: $1.15

100 & up: $1.00

In Stock

AN4-45
Condition: New

1/4-28 x 4.188 Grip Airframe Bolt, 4.66 UHL, Drilled Shank

1 to 9: $1.79

10 to 99: $1.59

100 & up: $1.39

In Stock

AN4-45A
Condition: New

1/4-28 x 4.188 Grip Airframe Bolt, 4.66 UHL, undrilled

1 to 9: $1.89

10 & up: $1.68

In Stock

AN4-46
Condition: New

1/4-28 x 4.313 Grip Airframe Bolt, 4.78 UHL, Drilled Shank

1 to 9: $1.79

10 to 99: $1.59

100 & up: $1.39

In Stock

AN4-46A
Condition: New

1/4-28 x 4.313 Grip Airframe Bolt, 4.78 UHL, undrilled

1 to 9: $1.89

10 & up: $1.68

In Stock
Call for Quote

AN4-47
Condition: New

1/4-28 x 4.438 Grip Airframe Bolt, 4.91 UHL, Drilled Shank

Call for QuoteNot In Stock
notify me when available

AN4-47A
Condition: New

1/4-28 x 4.438 Grip Airframe Bolt, 4.91 UHL, undrilled

1 to 9: $2.29

10 to 99: $2.04

100 & up: $1.79

In Stock
Call for Quote

AN4-50
Condition: New

1/4-28 x 4.563 Grip Airframe Bolt, 5.03 UHL, Drilled Shank

Call for QuoteNot In Stock
notify me when available

AN4-50A
Condition: New

1/4-28 x 4.563 Grip Airframe Bolt, 5.03 UHL, undrilled

1 to 7: $3.69

8 to 59: $3.31

60 & up: $2.92

In Stock

AN4-51A
Condition: New

1/4-28 x 4.688 Grip Airframe Bolt, 5.16 UHL, undrilled

1 to 9: $2.29

10 to 99: $2.04

100 & up: $1.79

In Stock

AN4-52A
Condition: New

1/4-28 x 4.813 Grip Airframe Bolt, 5.28 UHL, undrilled

1 to 9: $2.99

10 & up: $2.67

In Stock

AN4-53A
Condition: New

1/4-28 x 4.938 Grip Airframe Bolt, 5.41 UHL, undrilled

1 to 7: $3.49

8 to 59: $3.13

60 & up: $2.76

In Stock

AN4-54A
Condition: New

1/4-28 x 5.063 Grip Airframe Bolt, 5.53 UHL, undrilled

1 to 7: $3.99

8 to 59: $3.58

60 & up: $3.16

In Stock

AN4-55A
Condition: New

1/4-28 x 5.188 Grip Airframe Bolt, 5.66 UHL, undrilled

1 to 7: $4.49

8 to 59: $4.03

60 & up: $3.57

In Stock

AN4-56A
Condition: New

1/4-28 x 5.313 Grip Airframe Bolt, 5.78 UHL, undrilled

1 to 7: $4.99

8 to 59: $4.48

60 & up: $3.97

In Stock

AN4-57A
Condition: New

1/4-28 x 5.438 Grip Airframe Bolt, 5.91 UHL, undrilled

1 to 7: $5.49

8 to 59: $4.94

60 & up: $4.38

In Stock

AN4-61A
Condition: New

1/4-28 x 5.688 Grip Airframe Bolt, 6.16 UHL, undrilled

1 to 7: $5.99

8 & up: $5.39

In Stock

AN4-62A
Condition: New

1/4-28 x 5.813 Grip Airframe Bolt, 6.28 UHL, undrilled

1 to 7: $6.49

8 & up: $5.85

In Stock

AN4-64A
Condition: New

1/4-28 x 6.063 Grip Airframe Bolt, 6.53 UHL, undrilled

1 to 7: $5.99

8 & up: $5.39

In Stock

AN4-65A
Condition: New

1/4-28 x 6.188 Grip Airframe Bolt, 6.66 UHL, undrilled

1 to 7: $6.49

8 & up: $5.85

In Stock

AN4-67A
Condition: New

1/4-28 x 6.438 Grip Airframe Bolt, 6.91 UHL, undrilled

1 to 7: $7.49

8 & up: $6.76

In Stock

AN4-70A
Condition: New

1/4-28 x 6.563 Grip Airframe Bolt, 7.03 UHL, undrilled

1 to 7: $8.49

8 & up: $7.67

In Stock

AN4-72A
Condition: New

1/4-28 x 6.813 Grip Airframe Bolt, 7.28 UHL, undrilled

1 to 5: $10.49

6 to 35: $9.49

36 & up: $8.49

In Stock

AN4-73A
Condition: New

1/4-28 x 6.938 Grip Airframe Bolt, 7.41 UHL, undrilled

1 to 5: $10.99

6 & up: $9.95

In Stock

AN4-74A
Condition: New

1/4-28 x 7.063 Grip Airframe Bolt, 7.53 UHL, undrilled

1 to 5: $11.49

6 & up: $10.41

In Stock

AN4-80A
Condition: New

1/4-28 x 7.563 Grip Airframe Bolt, 8.03 UHL, undrilled

1 to 5: $12.29

6 & up: $11.14

In Stock
 

REVIEW SNAPSHOT®

by PowerReviews
AN4 Airframe Bolt, 1/4-28 Thread
 
5.0

(based on 2 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

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    (0)

Reviewed by 2 customers

Displaying reviews 1-2

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5.0

A quality product at a competitive price

By Zandogrand

from Sydney, Australia

Verified Buyer

Comments about AN4 Airframe Bolt, 1/4-28 Thread:

I purchased a range of AN bolts, jetnuts and washers for use on a new race car. An AN bolt is a product that must meet a well-defined standard and all of the bolts supplied clearly met this standard

Service and delivery comments:

My purchase arrived promptly and in good condition, exactly as ordered.

 
5.0

I would buy these again

By Barry P

from Lenoir City, TN

Verified Buyer

Comments about AN4 Airframe Bolt, 1/4-28 Thread:

Met my expectations

Displaying reviews 1-2

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