How often do you have to change the retainer ?

The retainer never needs replacing unless you crack or break it. It is a plastic cap that fits on top of 3M 6000 series cartridges or 5000 series respirators to hold 3M particulate filters 5N11 or 5P71. This allows you to replace your particulate filters without having to replace the entire cartridge.

When this is all combined with the adapter and filters will there be something for the hole? I've seen some pictures where there appears to be plug

The hole is filled by the n95 filter pad that fits tightly within the adapter. The pads can be used for days or even weeks between changes, although care must be taken that the outside surface of the pad is not touched during changes. The hole should only have the outside surface of the pad showing. Make sure that the writing side of the pad is toward the inside.

Son las tapas qué sujetan los filtros de tela que van encima de los cartuchos.

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3M 501 Filter Retainer Lot of 2

Product ID: 42803240

Details

Brand
3M
Color
White
Material
Plastic
Model Name
3M - 501 - 2pk
Size
Pack of 2

♻️Durable reusable plastic

⚙️Precision fit design

🛡️Secure filter hold

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€ 13.70

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
3M
Color
White
Material
Plastic

Description

🛡️ Lock in safety, unlock peace of mind.

DURABLE BUILD - Crafted from sturdy plastic to withstand daily industrial wear and tear.
TRUSTED 3 M QUALITY - Backed by 3M’s industry-leading safety standards and a 4.7-star rating from over 1,100 users.
DUAL PACK CONVENIENCE - Two retainers per pack means you’re always ready with a backup or for multiple masks.
FLAWLESS COMPATIBILITY - Engineered for a perfect fit on all 3M masks, ensuring no filter slips away.
RELIABLE FILTER RETENTION - Keeps your pre-filters and dust filters locked in place for maximum protection.

The 3M 501 Filter Retainer Lot of 2 offers a precision-engineered, durable plastic frame designed to securely hold pre-filters and dust filters on 3M masks. Ideal for professionals demanding reliable respiratory protection, this dual pack ensures consistent performance and trusted 3M quality, making it a must-have accessory for workplace safety.

Specifications

ASIN	B0020G2XOS
Best Sellers Rank	#24,414 in Automotive ( See Top 100 in Automotive ) #361 in Automotive Replacement Air Filters
Brand	3M
Brand Name	3M
Color	White
Customer Reviews	4.7 out of 5 stars 1,175 Reviews
Included Components	3M - 501 - 2pk
Item Dimensions	4 x 1 x 4 inches
Item Nype Name	3M - 501 - 2pk
Item dimensions L x W x H	4 x 1 x 4 inches
Manufacturer	3M
Manufacturer Part Number	3M - 501 - 2pk
Material	Plastic
Material Type	Plastic
Model Name	3M - 501 - 2pk
Model Number	3M - 501 - 2pk
Number of Layers	1
Size	Pack of 2
UPC	689358584730 051138543747
Unit Count	1.0 Count

Reviews

N**R

7.12.2022

J**E

19.07.2021

T**.

12.12.2024

B**R

1.09.2025

M**A

22.11.2020

J**E

28.12.2020

P**R

15.04.2025

A**T

21.02.2022

R**E

29.03.2026

S**1

1.12.2019

D**L

14.01.2015

C**N

2.01.2019

M**I

26.01.2014

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