Osculati AISI 316 Stainless Steel Domed Hex Cap Nuts DIN 1587 / UNI 5721, M4–M12

ID 1402803

$ 35.66

1-2 weeks delivery time

Diameter, mm:

Item:

5 pcs
10 pcs
25 pcs

Osculati DIN 1587 / UNI 5721 domed hex cap nuts are manufactured from AISI 316 stainless steel and feature a closed, rounded cap above a hexagonal base. Designed for compatible metric threaded connections, they cover the protruding end of a bolt or threaded stud, providing a neat finished appearance and helping reduce contact with exposed threads. The hexagonal section allows installation using a matching wrench or socket, while the AISI 316 construction offers corrosion resistance for suitable marine and outdoor applications. Available in six thread sizes from M4 to M12, with box quantities of 5, 10 or 25 pieces depending on size.

Description
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Osculati AISI 316 Stainless Steel Domed Hex Cap Nuts DIN 1587 / UNI 5721

Osculati domed hex cap nuts are manufactured from AISI 316 stainless steel and conform to DIN 1587 / UNI 5721. They combine a hexagonal threaded base with a closed, dome-shaped cap, providing a finished appearance for compatible marine fittings and mechanical assemblies.

The closed cap covers the end of a bolt or threaded stud, helping protect the exposed threads from direct contact and providing a smooth, rounded exterior. This design is useful for visible fastening points where an ordinary open hex nut would leave the threaded end exposed.

The hexagonal base allows tightening with a correctly sized wrench or socket. The internal metric thread is designed for use with compatible bolts, machine screws and threaded rods. When selecting a cap nut, the available internal depth must accommodate the protruding threaded end.

AISI 316 stainless steel provides corrosion resistance for suitable marine, outdoor and general mechanical applications. These nuts can be used with compatible deck fittings, mounting brackets, equipment components and other threaded connections.

The range includes six nominal metric thread sizes from M4 to M12. Each size is identified by an individual Osculati part number and supplied in a box containing 5, 10 or 25 pieces.

Technical Specifications

Brand	Osculati
Product Type	Domed Hex Cap Nut
Standards	DIN 1587 / UNI 5721
Material	AISI 316 Stainless Steel
Nut Design	Closed Domed Cap with Hexagonal Base
Thread Type	Internal Metric Thread
Available Thread Sizes	M4, M5, M6, M8, M10, M12
Box Quantities	5, 10, 25 pcs
Number of Variants	6

Features and Applications

Manufactured from AISI 316 stainless steel for corrosion resistance.
DIN 1587 / UNI 5721 domed cap nut design.
Closed rounded top covers the end of a compatible threaded fastener.
Smooth exterior provides a neat, finished appearance.
Hexagonal base for installation with a matching wrench or socket.
Internal metric threads for compatible bolts and threaded studs.
Suitable for marine fittings, exposed fastening points and mechanical assemblies.
Available in six thread sizes from M4 to M12.

Available Thread Sizes and Part Numbers

Thread Size	Box Quantity	Osculati Part No.
M4	25 pcs	A4-1587-04
M5	25 pcs	A4-1587-05
M6	10 pcs	A4-1587-06
M8	10 pcs	A4-1587-08
M10	5 pcs	A4-1587-10
M12	5 pcs	A4-1587-12

Size Selection

Select the required metric thread size to match the corresponding bolt, machine screw or threaded stud. Ensure that the protruding threaded end fits within the closed cap and does not prevent the nut from achieving proper clamping.

Each size has a fixed box quantity as indicated above. The internal cap depth, thread pitch and wrench dimensions are not specified in the supplied catalogue information.