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AN4H Bolts -- Drilled Head Product Group

AN4H Bolts -- Drilled Head

AN4H bolts have a 1/4-28 thread with 0.469 inch thread length (except AN4H-3A, which has 0.406 inch thread length). The head of each AN4H bolt is predrilled for safety wire.

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 a drilled head and an undrilled shank for use with safety wire and a self-locking nut.

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

Image
Part No.
Description
Price
Status
AN4  Airframe Bolt - Drilled Head, 1/4-28 Thread

AN4H-Size 

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

Click to check price Some
In Stock
Pocket AN Bolt Identification Gauge

3319 

Pocket AN Bolt Identification Gauge

$12.99In Stock
(HAO) Torque Seal Inspector's Lacquer, Orange, 1/2 oz. Tube

3329 

(HAO) Torque Seal Inspector's Lacquer, Orange, 1/2 oz. Tube

$2.49In Stock
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