M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) (pack of 100)

Accu Product Code (APC): SFHUL-M4-20-A4-ALK

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M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) (pack of 100)

Accu Product Code (APC): SFHUL-M4-20-A4-ALK

Key Features

Anu-Lok 180 is an adjustable and reusable Nylon patch for medium duty applications.
Mimics Nylock with up to 5 re-uses and effective from -50°C to 120°C.
Free Technical Support From Our Engineers.

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Accu Product Code (APC): SFHUL-M4-20-A4-ALK
Thread Size: M4 (4 mm)
Shoulder Length (L): 20 mm
Shoulder Diameter (SD): 5 mm Tolerance: +0/-0.025 mm
Material: Stainless Steel - Marine (A4)
Finish: Thread Locking - Anu-Lok 180
Head Diameter (D): 8 mm
Head Length (H): 1.3 mm
Manufacturing Standard: Not Standardised
Material Family: Stainless Steel
System of Measurement: Metric
Thread Length (E): 5 mm
Thread Pitch: 0.7 mm
Weight per 100 Units: 455 g

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M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) Description

The M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) has the following features:

Thread Locking - Anu-Lok 180 Finish
Head Diameter (D): 8 mm
Head Length (H): 1.3 mm
Manufacturing Standard: Not Standardised
Stainless Steel - Marine (A4)
Stainless Steel Material Family
Shoulder Diameter (SD): 5 mm
Shoulder Diameter (SD) Tolerance: +0/-0.025 mm
Shoulder Length (L): 20 mm
System of Measurement: Metric
Thread Length (E): 5 mm
Thread Pitch: 0.7 mm
Thread Size: M4 (4 mm)

Discover more about the Metric Ultra Low Head Slotted Shoulder Screws range.

AccuScrews' Metric Ultra Low Head Slotted Shoulder Screws feature a large, unthreaded portion below the head. Ultra Low Head Slotted Shoulder Screws are fitted with a low-profile head for space conservation purposes, and are machined to a highly precise tolerance of +/-0.025mm. The tight tolerance of this component makes it ideal for applications requiring high-precision sliding or rotation.

AccuScrews’ Ultra Low Head Slotted Shoulder Screws are also fitted with a widely-used slotted drive, making them compatible with AccuScrews’ ranges of Slotted Drive Bits and Insulated Slotted Screwdrivers.

Materials

These components can be manufactured from A2 and A4 Stainless Steel.

Improve the longevity and stability of your Ulta Low Head Slotted Shoulder Screws with Accu’s pre-applied thread-locking patches. From the leading reliability of AccuLock Threadlocker to the heavy-duty Anu-Lok 180 and the high-performance Precote 80, your fasteners remain secure. Add a professional touch with AccuBlack chemical blackening, designed to minimise reflections and provide a premium aesthetic.

Metric Ultra Low Head Slotted Shoulder Screws

Metric Ultra Low Slotted Shoulder Screws are produced in thread sizes ranging from M3 to M6, shoulder diameters of 4.00mm to 8.00mm, and are available with shoulder lengths ranging from 4.00mm up to 20.00mm.

Imperial Ultra Low Head Slotted Shoulder Screws

Slotted Ultra Low Head Shoulder Screws are available in imperial thread sizes from No. 2 up to No. 10, with shoulder lengths of between 1/8 inch and 1 inch, and shoulder diameters ranging from 3/32 inch up to 1/4 inch.

Shipping Information

Shipping Destinations:

Worldwide view delivery information

Weight (100 items):

0.455kg

Component History

Product First Available:

Monday, November 18, 2024

Stock Last Updated:

12:05 PMThursday, June 4, 2026

Specification Last Updated:

Thursday, June 4, 2026

Barcodes

APC (Accu Product Code):

SFHUL-M4-20-A4-ALK

EAN13 (International Article No.):

5063648861193

ASIN (Amazon Stock Identification No.):

ASIN not defined.

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Thread Size

Shoulder Length (L)

Shoulder Diameter (SD)

Material

Finish

Head Diameter (D)

Head Length (H)

Manufacturing Standard

Material Family

System of Measurement

Thread Length (E)

Thread Pitch

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M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4).

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M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) (pack of 100)

M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) M4 (5mm) x 20mm Ultra Low Head Slotted Shoulder Screws - Anu-Lok 180 - Marine Stainless Steel (A4) (pack of 100)

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