In stock

AN3-4A

Name: AN3-4A
Brand: Aeronautical Standard
SKU: NAT-AN3-4A
Price: 0.17 USD
Availability: InStock

The AN3-4A aircraft bolt has a nominal length of 17/32 inch, a grip length of 1/8 inch, and a thread length of 0.406 inch.

$0.17

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AN3-4A

$0.17

Product Description

AN3-4A is a hexagonal-head aircraft bolt with a #10-32 UNF right-hand thread and an undrilled shank, used for structural fastening where a cadmium-finished alloy steel fastener with a defined grip length is required.

0 1. Overview

This bolt belongs to the AN3 series of aircraft bolts manufactured from high-strength alloy steel grades 4037 or 8740. The fastener has a hex head and an undrilled shank, with the dash letter A identifying the undrilled configuration for use with stop nuts or applications that do not require a cotter pin. Thread form is UNF with thread size #10-32 and thread class 3A for close-tolerance engagement.

For the AN3-4A size, the nominal length is 17/32 inch and the grip length is 1/8 inch, with a thread length of 0.406 inch. The head diameter is 0.43 inch and head height ranges from 0.109 to 0.141 inch. The material is alloy steel with a cadmium finish, and the thread direction is right-hand. Technical information notes FAA-STD approval and identifies the bolt as suitable for use in helicopter applications. The alloy steel grades are referenced as 4037 and 8740 for the construction of this airframe fastener.

0 2. Key Features

Hex head aircraft bolt in the AN3 series
Undrilled shank configuration identified by the A suffix
#10-32 UNF right-hand thread with class 3A tolerance
Nominal bolt length of 17/32 inch for the -4 dash size
Grip length of 1/8 inch with 0.406 inch thread length
Manufactured from 4037 or 8740 alloy steel with cadmium finish
Head diameter of 0.43 inch and head height range of 0.109 to 0.141 inch
Technical data notes FAA-STD approval and helicopter suitability

0 3. Specifications

Part Number: AN3-4A
Series: AN3
Fastener Type: Hexagonal-head machine bolt, undrilled shank
Material: Alloy steel (grades 4037/8740)
Finish: Cadmium
Diameter: #10
Thread Size: #10-32
Thread Type: UNF
Thread Class: 3A
Thread Direction: Right-hand
Nominal Length: 17/32 in
Grip Length: 1/8 in
Thread Length: 0.406 in
Head Type: Hexagonal
Head Diameter: 0.43 in
Head Height: 0.109 to 0.141 in
Technical Approval: FAA-STD approved
Suitable for Use With: Helicopter applications
Pack Quantity: 100 per pack

FAQs

01. What does the A suffix indicate on the AN3-4A bolt?

The A suffix on the AN3-4A bolt indicates that the shank is undrilled.

02. What are the key dimensions of the AN3-4A aircraft bolt?

The AN3-4A aircraft bolt has a nominal length of 17/32 inch, a grip length of 1/8 inch, and a thread length of 0.406 inch.

03. What thread specification does AN3-4A use?

AN3-4A uses a #10-32 UNF right-hand thread with class 3A tolerance.

04. From what material is the AN3-4A bolt manufactured?

The AN3-4A bolt is manufactured from alloy steel grades 4037 and 8740 with a cadmium finish.

05. What technical approval is referenced for the AN3-4A bolt?

The AN3-4A bolt is identified as FAA-STD approved.