IMPA: 692401

Brass Dog Bolt with Wing Nut / Butterfly Nut – IMPA 692401

This brass dog bolt with wing nut (also known as butterfly nut) is a versatile threaded fastener designed for marine, shipbuilding, and industrial applications. The integrated wing nut allows for quick hand-tightening without tools, making it ideal for temporary or adjustable fastening on deck, hatches, and machinery. Manufactured from high-quality brass, it offers excellent corrosion resistance in saltwater environments.

Available in both metric coarse thread and Whitworth thread options, this dog bolt comes in a range of diameters and lengths to suit various fastening requirements. Metric sizes from M8 to M24 and imperial sizes from 3/8" to 1" are stocked. Other materials such as steel and stainless steel are available upon request. Order by specifying material, thread diameter and pitch, and length.

Key Features

Technical Specifications

Thread TypeDiameterPitchLengthIMPA Code
Metric CoarseM81.25 mm60 mm692401
Metric CoarseM101.5 mm60 mm
Metric CoarseM121.75 mm80 mm
Metric CoarseM162.0 mm100 mm
Metric CoarseM202.5 mm120 mm
Metric CoarseM222.5 mm140 mm
Metric CoarseM222.5 mm200 mm
Metric CoarseM243.0 mm160 mm
Metric CoarseM243.0 mm200 mm
Whitworth3/8"60 mm
Whitworth3/8"80 mm
Whitworth3/8"100 mm
Whitworth1/2"80 mm
Whitworth1/2"100 mm
Whitworth1/2"120 mm
Whitworth5/8"100 mm
Whitworth5/8"120 mm
Whitworth5/8"150 mm
Whitworth3/4"120 mm
Whitworth3/4"150 mm
Whitworth3/4"180 mm
Whitworth7/8"140 mm
Whitworth7/8"160 mm
Whitworth1"180 mm

Frequently Asked Questions

What materials are available for this dog bolt?

Standard material is brass. Steel and stainless steel are also available upon request. Please specify when ordering.

What thread types are offered?

Both metric coarse thread and Whitworth thread options are available. Metric sizes range from M8 to M24, and imperial sizes from 3/8" to 1".

How do I order the correct size?

Use the format: Dog bolt, MATERIAL, THREAD DIAM x PITCH mm, LENGTH. For example: Dog bolt, Brass, M8 x 1.25 mm, 60 mm.

Is the wing nut removable?

The wing nut is integrated as part of the dog bolt assembly and is not intended to be removed. It allows quick hand-tightening for temporary or adjustable fastening.

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