Customers who purchased this item also purchased:

AN5 Airframe Bolt - Drilled Head, 5/16-24 Thread

AN960 Flat Washer (100 pack)

MS21042 Style B Jetnut, All Metal Locknut

AN3 Airframe Bolt - Drilled Head, 10-32 Thread

AN4 Airframe Bolt, 1/4-28 Thread

What our customers are saying:

"Just wanted to say thank you for your excellent parts inventory and delivery! I live in Canada and the last order I placed arrived the next day! I race a vintage MGB and your company usually has everything I need. Thanks again."
R.E. from Ontario, Canada

AN4 Airframe Bolt - Drilled Head, 1/4-28 Thread

AN4H bolts have a 0.046" hole drilled through the head for safety wire. They have a 1/4-28 UNF thread with 0.469 inch thread length on all sizes (except AN4H-3A, which has 0.406 inch thread length). This length is designed to accommodate a full-height nut plus one AN960-416 washer. Sold individually; nuts and washers sold separately.

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, AN4H-15A) 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

AN4H-3
Condition: New
SKU: 39396

1/4-28 x 0.063 Grip Airframe Bolt, 0.47 UHL, Drill Hd+Shank

1 to 7: $3.99 8 to 59: $3.61 60 to 499: $3.22 500 & up: call

In Stock

AN4H-3A
Condition: New
SKU: 39397

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

1 to 11: $0.54 12 to 149: $0.48 150 & up: $0.41

In Stock

Call for Quote

AN4H-4
Condition: New
SKU: 39398

1/4-28 x 0.063 Grip Airframe Bolt, 0.53 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-4A
Condition: New
SKU: 39399

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

1 to 11: $0.54 12 to 149: $0.48 150 & up: $0.41

In Stock

Call for Quote

AN4H-5
Condition: New
SKU: 39400

1/4-28 x 0.188 Grip Airframe Bolt, 0.66 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-5A
Condition: New
SKU: 39401

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

1 to 11: $0.79 12 to 149: $0.70 150 & up: $0.60

In Stock

AN4H-6
Condition: New
SKU: 39402

1/4-28 x 0.313 Grip Airframe Bolt, 0.78 UHL, Drill Hd+Shank

1 to 9: $2.49 10 to 99: $2.22 100 & up: $1.95

In Stock

AN4H-6A
Condition: New
SKU: 39403

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

1 to 11: $0.59 12 to 149: $0.52 150 & up: $0.45

In Stock

AN4H-7
Condition: New
SKU: 39404

1/4-28 x 0.438 Grip Airframe Bolt, 0.91 UHL, Drill Hd+Shank

1 to 11: $0.99 12 to 149: $0.88 150 & up: $0.76

In Stock

AN4H-7A
Condition: New
SKU: 39405

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

1 to 11: $0.69 12 to 149: $0.62 150 & up: $0.55

In Stock

AN4H-10
Condition: New
SKU: 39406

1/4-28 x 0.563 Grip Airframe Bolt, 1.03 UHL, Drill Hd+Shank

1 to 11: $0.99 12 to 149: $0.88 150 & up: $0.76

In Stock

AN4H-10A
Condition: New
SKU: 39407

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

1 to 9: $1.29 10 to 99: $1.15 100 to 999: $1.00 1000 & up: call

In Stock

AN4H-11
Condition: New
SKU: 39408

1/4-28 x 0.688 Grip Airframe Bolt, 1.16 UHL, Drill Hd+Shank

1 to 7: $4.49 8 to 59: $4.03 60 & up: $3.57

In Stock

AN4H-11A
Condition: New
SKU: 39409

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

1 to 11: $0.59 12 to 149: $0.52 150 & up: $0.45

In Stock

AN4H-12
Condition: New
SKU: 39410

1/4-28 x 0.813 Grip Airframe Bolt, 1.28 UHL, Drill Hd+Shank

1 to 9: $1.29 10 to 99: $1.15 100 & up: $1.01

In Stock

AN4H-12A
Condition: New
SKU: 39411

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

1 to 9: $1.19 10 & up: $1.06

In Stock

Call for Quote

AN4H-13
Condition: New
SKU: 77452

1/4-28 x 0.938 Grip Airframe Bolt, 1.41 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-13A
Condition: New
SKU: 39413

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

1 to 11: $0.79 12 to 149: $0.70 150 & up: $0.60

In Stock

AN4H-14
Condition: New
SKU: 39414

1/4-28 x 1.063 Grip Airframe Bolt, 1.53 UHL, Drill Hd+Shank

1 to 9: $1.93 10 to 99: $1.75 100 & up: $1.57

In Stock

AN4H-14A
Condition: New
SKU: 39415

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

1 to 11: $0.79 12 to 149: $0.70 150 & up: $0.60

In Stock

AN4H-15
Condition: New
SKU: 39416

1/4-28 x 1.188 Grip Airframe Bolt, 1.66 UHL, Drill Hd+Shank

1 to 9: $1.19 10 & up: $1.06

In Stock

AN4H-15A
Condition: New
SKU: 39417

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

1 to 11: $0.89 12 to 149: $0.79 150 & up: $0.68

In Stock

AN4H-16
Condition: New
SKU: 39418

1/4-28 x 1.313 Grip Airframe Bolt, 1.78 UHL, Drill Hd+Shank

1 to 9: $1.00 10 & up: $0.91

In Stock

AN4H-16A
Condition: New
SKU: 39419

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

1 to 11: $0.89 12 to 149: $0.79 150 & up: $0.68

In Stock

AN4H-17
Condition: New
SKU: 39420

1/4-28 x 1.438 Grip Airframe Bolt, 1.91 UHL, Drill Hd+Shank

1 to 9: $2.87 10 to 99: $2.61 100 & up: $2.34

In Stock

AN4H-17A
Condition: New
SKU: 39421

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

1 to 9: $1.29 10 to 99: $1.17 100 & up: $1.04

In Stock

AN4H-20
Condition: New
SKU: 39422

1/4-28 x 1.563 Grip Airframe Bolt, 2.03 UHL, Drill Hd+Shank

1 to 9: $2.93 10 to 99: $2.66 100 & up: $2.39

In Stock

AN4H-20A
Condition: New
SKU: 39423

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

1 to 11: $0.99 12 to 149: $0.88 150 & up: $0.76

In Stock

Call for Quote

AN4H-21
Condition: New
SKU: 39424

1/4-28 x 1.688 Grip Airframe Bolt, 2.16 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-21A
Condition: New
SKU: 39425

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

1 to 9: $1.29 10 & up: $1.15

In Stock

AN4H-22
Condition: New
SKU: 39426

1/4-28 x 1.813 Grip Airframe Bolt, 2.28 UHL, Drill Hd+Shank

1 to 7: $4.69 8 to 59: $4.55 60 & up: $4.41

In Stock

AN4H-22A
Condition: New
SKU: 39427

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

1 to 11: $0.99 12 to 149: $0.88 150 & up: $0.76

In Stock

Call for Quote

AN4H-23
Condition: New
SKU: 39428

1/4-28 x 1.938 Grip Airframe Bolt, 2.41 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-23A
Condition: New
SKU: 39429

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

1 to 9: $1.09 10 to 99: $0.97 100 & up: $0.84

In Stock

Call for Quote

AN4H-24
Condition: New
SKU: 39430

1/4-28 x 2.063 Grip Airframe Bolt, 2.53 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-24A
Condition: New
SKU: 39431

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

1 to 9: $1.09 10 & up: $0.97

In Stock

Call for Quote

AN4H-25
Condition: New
SKU: 39432

1/4-28 x 2.188 Grip Airframe Bolt, 2.66 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-25A
Condition: New
SKU: 39433

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

1 to 9: $1.09 10 to 99: $0.97 100 & up: $0.84

In Stock

AN4H-26
Condition: New
SKU: 39434

1/4-28 x 2.313 Grip Airframe Bolt, 2.78 UHL, Drill Hd+Shank

1 to 5: $11.99 6 & up: $10.86

Not In Stock
notify me when available

AN4H-26A
Condition: New
SKU: 39435

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

1 to 9: $1.35 10 to 99: $1.20 100 & up: $1.04

In Stock

Call for Quote

AN4H-27
Condition: New
SKU: 39436

1/4-28 x 2.438 Grip Airframe Bolt, 2.91 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-27A
Condition: New
SKU: 39437

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

1 to 9: $1.35 10 to 99: $1.20 100 & up: $1.04

In Stock

Call for Quote

AN4H-30
Condition: New
SKU: 39438

1/4-28 x 2.563 Grip Airframe Bolt, 3.03 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-30A
Condition: New
SKU: 39439

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

1 to 9: $1.45 10 to 99: $1.29 100 & up: $1.12

In Stock

Call for Quote

AN4H-31
Condition: New
SKU: 39440

1/4-28 x 2.688 Grip Airframe Bolt, 3.16 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-31A
Condition: New
SKU: 39441

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

1 to 9: $1.45 10 to 99: $1.29 100 & up: $1.12

In Stock

Call for Quote

AN4H-32
Condition: New
SKU: 39442

1/4-28 x 2.813 Grip Airframe Bolt, 3.28 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-32A
Condition: New
SKU: 39443

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

1 to 9: $1.45 10 to 99: $1.29 100 & up: $1.12

In Stock

AN4H-33
Condition: New
SKU: 39444

1/4-28 x 2.938 Grip Airframe Bolt, 3.41 UHL, Drill Hd+Shank

1 to 7: $3.54 8 to 59: $3.21 60 to 499: $2.88 500 & up: call

In Stock

AN4H-33A
Condition: New
SKU: 39445

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

1 to 9: $2.67 10 & up: $2.42

In Stock

Call for Quote

AN4H-34
Condition: New
SKU: 39446

1/4-28 x 3.063 Grip Airframe Bolt, 3.53 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-34A
Condition: New
SKU: 39447

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

1 to 9: $1.79 10 to 99: $1.59 100 & up: $1.39

In Stock

Call for Quote

AN4H-35
Condition: New
SKU: 39448

1/4-28 x 3.188 Grip Airframe Bolt, 3.66 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-35A
Condition: New
SKU: 39449

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

1 to 9: $1.59 10 to 99: $1.41 100 & up: $1.23

In Stock

Call for Quote

AN4H-36
Condition: New
SKU: 39450

1/4-28 x 3.313 Grip Airframe Bolt, 3.78 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-36A
Condition: New
SKU: 39451

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

1 to 7: $7.19 8 to 59: $6.48 60 & up: $5.77

In Stock

Call for Quote

AN4H-37
Condition: New
SKU: 39452

1/4-28 x 3.438 Grip Airframe Bolt, 3.91 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-37A
Condition: New
SKU: 39453

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

1 to 9: $1.99 10 & up: $1.77

In Stock

AN4H-40
Condition: New
SKU: 39454

1/4-28 x 3.563 Grip Airframe Bolt, 4.03 UHL, Drill Hd+Shank

1 to 5: $23.79 6 & up: $21.79

Not In Stock
notify me when available

AN4H-40A
Condition: New
SKU: 39455

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

1 to 5: $18.99 6 & up: $17.27

In Stock

AN4H-41
Condition: New
SKU: 39456

1/4-28 x 3.688 Grip Airframe Bolt, 4.16 UHL, Drill Hd+Shank

1 to 5: $12.99 6 to 35: $11.78 36 & up: $10.56

In Stock

AN4H-41A
Condition: New
SKU: 39457

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

1 to 7: $6.89 8 to 59: $6.26 60 & up: $5.62

In Stock

Call for Quote

AN4H-42
Condition: New
SKU: 39458

1/4-28 x 3.813 Grip Airframe Bolt, 4.28 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-42A
Condition: New
SKU: 39459

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

1 to 7: $5.99 8 to 59: $5.42 60 & up: $4.85

In Stock

Call for Quote

AN4H-43
Condition: New
SKU: 39460

1/4-28 x 3.938 Grip Airframe Bolt, 4.41 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

Call for Quote

AN4H-43A
Condition: New
SKU: 39461

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

Call for Quote

Not In Stock
notify me when available

Call for Quote

AN4H-44
Condition: New
SKU: 39462

1/4-28 x 4.063 Grip Airframe Bolt, 4.53 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-44A
Condition: New
SKU: 39463

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

1 to 9: $2.85 10 & up: $2.55

In Stock

Call for Quote

AN4H-45
Condition: New
SKU: 77453

1/4-28 x 4.188 Grip Airframe Bolt, 4.66 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

Call for Quote

AN4H-45A
Condition: New
SKU: 39465

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

Call for Quote

Not In Stock
notify me when available

Call for Quote

AN4H-46
Condition: New
SKU: 39466

1/4-28 x 4.313 Grip Airframe Bolt, 4.78 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

AN4H-46A
Condition: New
SKU: 39467

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

1 to 5: $20.19 6 & up: $18.45

Not In Stock
notify me when available

Call for Quote

AN4H-47
Condition: New
SKU: 39468

1/4-28 x 4.438 Grip Airframe Bolt, 4.91 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

Call for Quote

AN4H-47A
Condition: New
SKU: 39469

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

Call for Quote

Not In Stock
notify me when available

Call for Quote

AN4H-50
Condition: New
SKU: 77454

1/4-28 x 4.563 Grip Airframe Bolt, 5.03 UHL, Drill Hd+Shank

Call for Quote

Not In Stock
notify me when available

Call for Quote

AN4H-50A
Condition: New
SKU: 39471

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

Call for Quote

Not In Stock
notify me when available

Customers who purchased this item also purchased
AN5 Airframe Bolt - Drilled Head, 5/16-24 Thread	AN960 Flat Washer (100 pack)	MS21042 Style B Jetnut, All Metal Locknut	AN3 Airframe Bolt - Drilled Head, 10-32 Thread	AN4 Airframe Bolt, 1/4-28 Thread

AN4 Airframe Bolt - Drilled Head, 1/4-28 Thread

Order Qty

Part No.

Desc.

Price

Status

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