Standard Abrasives™ Surface Conditioning Flap Disc, 821310, 4-1/2 in x 7/8 in VFN, 5/Carton, 50 ea/Case

Suitable for a variety of substrates, the Standard Abrasives™ Surface Conditioning Flap Disc effectively blends, deburrs and finishes in one step. It can also be used for light grinding. The overlapping flaps provide several layers of abrasives for increased durability and enhanced cut rate. The versatility of the Surface Conditioning Flap Disc makes it a handy standby in any workshop.
Special Price $25.38 Regular Price $29.86
UPC 00051115330513
3M ID 7000121835
Packaging Carton
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Durable and Heat-Resistant

Ideal for light deburring and blending applications where final finish is important, the Standard Abrasives™ Surface Conditioning Flap Disc delivers a fast cut and consistent finish in a single step. The non-woven nylon material is both durable and load-resistant, making this an especially long-lasting disc. The heat resistant open web makes this an excellent choice for use on aluminum, stainless steel, and titanium.

Recommended Applications

This non-woven aluminum oxide product offers an excellent solution for deburring, edge breaking, blending, cleaning, finishing, and polishing after traditional grinding is done with a Resin Fiber or Flap Disc. Use it for deburring milled surfaces and edges, preparing for anodizing, blending weld seams, removing flash and parting lines, and removing scratches or weld discoloration.

Engineered for Single-Step Efficiency and Extended Utility

Flap discs are three-dimensional discs with overlapping layers of non-woven, scrim-reinforced flaps that fan out from a central hub. The overlapping layers continually expose fresh abrasive mineral for a fast cut, while the cushioning of the flaps creates a consistent, blended finish. The one-step alternative to coated discs, surface conditioning flap discs deburr and finish in a single step, making them a time and cost-saving solution in many typical applications. And, because their overlapping construction allows more abrasive material to be loaded onto the cutting surface, they far outlast typical discs. Flap discs have the flexibility to easily follow curves and contours while delivering less gouging and enhancing operator comfort.

Using a Flap Disc

Flap discs are used on a right angle grinder. Flap discs with a 7/8? center hole can be secured onto a right angle sander with a compatible disc retainer nut (sold separately). Flap discs with a 5/8-11 internal thread are designed to be mounted directly to tools with 5/8-11 EXT threaded shafts.

The Standard Abrasives™ Surface Conditioning Flap Disc is designed with a Type 29 conical profile. Flaps are angled to provide more aggressive cutting action, making this profile ideal for stock removal and faster results on edge work, flats and contours.


  • Non-woven flaps combine deburring, blending and finishing into one step for greater efficiency
  • Constructed for long life, flexibility, heat-resistance and load-resistance
  • Excellent choice for aluminum, steel and titanium substrates
  • Overlapping flaps increase durability and enhance cut rate
  • Open web responds to surface irregularities and minimizes gouging of the part
  • Phenolic resin plate provides cushion effect for optimal blending and dampens vibration, reducing operator fatigue and tool wear
  • Made with aluminum oxide for fast cut rate and long life
More Information
3M ID 7000121835
Part number 821310
Keywords Standard Abrasive, Metalworking
Global Product Hierarchy Abrasives > Abrasive Discs > Flap Discs
Abrasive Material Aluminum Oxide
Center Hole Diameter (Imperial) 0.875 in
Center Hole Thread Size Non Pertinent
Center Hole Diameter (Metric) 22.225 mm
Disc Type Non Pertinent
Grit Non Pertinent
Product Type simple
Quantity 0
Trademark 1 Standard Abrasives™
Country of Origin Belgium
Sales Unit EA
SAP Shelf Life In Days 3650
Base - Billing Unit EA
Base - Customary Height Dimension 4.488188976
Base - Customary Length Dimension 0.511811024
Base - Customary Width Dimension 4.488188976
Base - Metric Gross Weight 45.4 G
Base - Metric Height Dimension 114.0 MM
Base - Metric Length Dimension 13.0 MM
Base - Metric Width Dimension 114.0 MM
Base - Item Quantity 1
Base - Unit EA
Unit of Use - Billing Unit EA
Unit of Use - Customary Cubic Dimension 10.30983951731683 ci
Unit of Use - Customary Gross Weight 0.10008986703193443 lbs
Unit of Use - Customary Net Weight 0.10008986703193443 lbs
Unit of Use - Customary Height Dimension 4.488188976377953 in
Unit of Use - Customary Length Dimension 0.5118110236220472 in
Unit of Use - Customary Width Dimension 4.488188976377953 in
Unit of Use - Metric Cubic Dimension 168.948 CCM
Unit of Use - Metric Net Weight 45.4 G
Unit of Use - Metric Height Dimension 114.0 MM
Unit of Use - Metric Length Dimension 13.0 MM
Unit of Use - Metric Width Dimension 114.0 MM
Unit of Use - Item Quantity 1
Unit of Use - Total Unit Quantity 1
Unit of Use - Previous Packaging Level Quantity 1
Unit of Use - Item Unit EACH
Unit of Use - Unit EA
Inner - Billing Unit EA
Inner - Customary Cubic Dimension 85.6509744515552 ci
Inner - Customary Gross Weight 0.5004493351596722 lbs
Inner - Customary Net Weight 0.5004493351596722 lbs
Inner - Customary Height Dimension 4.251968503937008 in
Inner - Customary Length Dimension 4.488188976377953 in
Inner - Customary Width Dimension 4.488188976377953 in
Inner - Metric Cubic Dimension 1403.568 CCM
Inner - Metric Net Weight 227.0 G
Inner - Metric Height Dimension 0.108 M
Inner - Metric Length Dimension 0.114 M
Inner - Metric Width Dimension 0.114 M
Inner - Item Quantity 5
Inner - Total Unit Quantity 5
Inner - Previous Packaging Level Quantity 5
Inner - Item Unit EACH
Inner - Previous Packaging Level Unit EACH
Inner - Unit KAR
Shipper - Billing Unit EA
Shipper - Customary Cubic Dimension 1167.2109170989995 ci
Shipper - Customary Gross Weight 5.758474288269002 lbs
Shipper - Customary Net Weight 5.004493351596721 lbs
Shipper - Customary Height Dimension 5.118110236220472 in
Shipper - Customary Length Dimension 23.74015748031496 in
Shipper - Customary Width Dimension 9.606299212598426 in
Shipper - Metric Cubic Dimension 19127.16 CCM
Shipper - Metric Weight 2.612 KG
Shipper - Metric Net Weight 2.27 KG
Shipper - Metric Height Dimension 0.13 M
Shipper - Metric Length Dimension 0.603 M
Shipper - Metric Width Dimension 0.244 M
Shipper - Item Quantity 50
Shipper - Total Unit Quantity 50
Shipper - Previous Packaging Level Quantity 10
Shipper - Previous Packaging Level Unit CTNS
Shipper - Item Unit EACH
Shipper - Unit CS
Pallet - Billing Unit EA
Pallet - Customary Cubic Dimension 93183.2572326562 ci
Pallet - Customary Gross Weight 414.46905290756985 lbs
Pallet - Customary Net Weight 320.2875745021901 lbs
Pallet - Customary Height Dimension 46.06299212598425 in
Pallet - Customary Length Dimension 48.031496062992126 in
Pallet - Customary Width Dimension 42.125984251968504 in
Pallet - Metric Cubic Dimension 1.527 M3
Pallet - Metric Net Weight 145.28 KG
Pallet - Metric Height Dimension 1.17 M
Pallet - Metric Length Dimension 1.22 M
Pallet - Metric Width Dimension 1.07 M
Pallet - Item Quantity 3200
Pallet - Total Unit Quantity 3200
Pallet - Previous Packaging Level Quantity 64
Pallet - Previous Packaging Level Unit BOX
Pallet - Item Unit EACH
Pallet - Unit PAL
Pallet - Pallet Layer Quantity 8
Pallet - Shipping Container Per Layer Quantity 8
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