Flap Disc

Flap Discs for Blending, Deburring & Surface Finishing

Flap discs are a smart choice when you want controlled removal plus a cleaner finish—often reducing the need to switch between multiple abrasive steps. They’re commonly used for weld blending, edge smoothing, and surface refinement in metalworking and fabrication.

Choose flap discs by grit: coarser for faster blending and cleanup, medium for smoothing, and finer grits for surface improvement and prep.

Best Use Cases

  • Weld blending and cleanup.
  • Edge smoothing and deburring.
  • Surface refinement and finishing steps.

Perfect for use with angle grinders and compatible with steel, stainless steel, aluminum, and more.

Not sure which disc type you need?

Buying for a Business (Recurring Disc Use)?

Need flap discs for ongoing shop work? Contact us for business purchasing support.

FAQS

What are flap discs best used for?

They’re ideal for blending welds, smoothing edges, and refining surfaces while maintaining good control and finish quality.

What grit flap disc should I use for weld blending?

Start with coarser grits for cleanup and blending, then move to medium/finer grits if you need smoother refinement.

Are flap discs good for finishing?

Yes—many users prefer flap discs for controlled finishing steps compared to more aggressive grinding methods.

Flap disc vs grinding wheel: which should I choose?

Use a grinding wheel for heavier removal and tougher cleanup. Use a flap disc when you want controlled blending and better surface finish.

Do you support bulk orders?

Yes—contact us for recurring supply and quantity requests.

Sort by:

  • Flap Disc, Type 27, 4-1/2" dia., 120 Grit
    SKU G6037129
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Fine, Backing Plate Material Plastic, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 1/2 in, Series XB1186, Backing Material Plastic, Backing Weight X, Grit 120, Maximum Operating Speed 13,300 RPM, Features Trimmable

    graingerSKU: 447R70, mscSKU: , zoro_no: G6037129, mongo_id: 65bbea1022d7a989a9993c3c

    $9.44 / each
    Web price
    Qty
    Flap Disc, Type 27, 4-1/2" dia., 120 Grit
    SKU G6037129
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Fine, Backing Plate Material Plastic, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 1/2 in, Series XB1186, Backing Material Plastic, Backing Weight X, Grit 120, Maximum Operating Speed 13,300 RPM, Features Trimmable

    graingerSKU: 447R70, mscSKU: , zoro_no: G6037129, mongo_id: 65bbea1022d7a989a9993c3c

    $9.44 / each
    Web price
    Qty
  • Flap Disc, Type 29, 5" dia., 60 Grit
    SKU G6034301
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Medium, Backing Plate Material Fiberglass, Connector Size 7/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 29, Overall Diameter 5 in, Series XB1186, Backing Material Fiberglass, Backing Weight X, Grit 60, Maximum Operating Speed 12,000 RPM

    graingerSKU: 447R68, mscSKU: , zoro_no: G6034301, mongo_id: 65bbe97a22d7a989a995a5d5

    $5.50 / each
    Web price
    Qty
    Flap Disc, Type 29, 5" dia., 60 Grit
    SKU G6034301
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Medium, Backing Plate Material Fiberglass, Connector Size 7/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 29, Overall Diameter 5 in, Series XB1186, Backing Material Fiberglass, Backing Weight X, Grit 60, Maximum Operating Speed 12,000 RPM

    graingerSKU: 447R68, mscSKU: , zoro_no: G6034301, mongo_id: 65bbe97a22d7a989a995a5d5

    $5.50 / each
    Web price
    Qty
  • Flap Disc, Type 27, 4-1/2" dia., 36 Grit
    SKU G5942513
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Extra Coarse, Backing Plate Material Fiberglass, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 1/2 in, Series XC1176, Backing Material Fiberglass, Backing Weight X, Grit 36, Maximum Operating Speed 13,300 RPM

    graingerSKU: , mscSKU: , zoro_no: G5942513, mongo_id: 65bbe90822d7a989a992f4f8

    $8.05 / each
    Web price
    Qty
    Flap Disc, Type 27, 4-1/2" dia., 36 Grit
    SKU G5942513
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Extra Coarse, Backing Plate Material Fiberglass, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 1/2 in, Series XC1176, Backing Material Fiberglass, Backing Weight X, Grit 36, Maximum Operating Speed 13,300 RPM

    graingerSKU: , mscSKU: , zoro_no: G5942513, mongo_id: 65bbe90822d7a989a992f4f8

    $8.05 / each
    Web price
    Qty
  • Flap Disc, Type 27, 4" dia., 40 Grit
    SKU G5941980
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Coarse, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 40, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R60, mscSKU: , zoro_no: G5941980, mongo_id: 65bbe81a9a749db822775553

    $3.77 / each
    Web price
    Qty
    Flap Disc, Type 27, 4" dia., 40 Grit
    SKU G5941980
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Coarse, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 40, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R60, mscSKU: , zoro_no: G5941980, mongo_id: 65bbe81a9a749db822775553

    $3.77 / each
    Web price
    Qty
  • Flap Disc, Type 27, 4" dia., 120 Grit
    SKU G5937449
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Fine, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 120, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R66, mscSKU: , zoro_no: G5937449, mongo_id: 65bbea1022d7a989a9993c3a

    $3.44 / each
    Web price
    Qty
    Flap Disc, Type 27, 4" dia., 120 Grit
    SKU G5937449
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Fine, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 120, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R66, mscSKU: , zoro_no: G5937449, mongo_id: 65bbea1022d7a989a9993c3a

    $3.44 / each
    Web price
    Qty
  • Flap Disc, Type 27, 4" dia., 36 Grit
    SKU G5922609
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Extra Coarse, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 36, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R67, mscSKU: , zoro_no: G5922609, mongo_id: 65bbe7759a749db82273c034

    $3.21 / each
    Web price
    Qty
    Flap Disc, Type 27, 4" dia., 36 Grit
    SKU G5922609
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Extra Coarse, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 36, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R67, mscSKU: , zoro_no: G5922609, mongo_id: 65bbe7759a749db82273c034

    $3.21 / each
    Web price
    Qty
  • Flap Disc, Type 27, 4" dia., 80 Grit
    SKU G5911549
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Medium, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 80, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R57, mscSKU: , zoro_no: G5911549, mongo_id: 65bbe7759a749db82273c030

    $3.10 / each
    Web price
    Qty
    Flap Disc, Type 27, 4" dia., 80 Grit
    SKU G5911549
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Medium, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 80, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R57, mscSKU: , zoro_no: G5911549, mongo_id: 65bbe7759a749db82273c030

    $3.10 / each
    Web price
    Qty
  • Flap Disc, Type 29, 4" dia., 60 Grit
    SKU G5574961
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Medium, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 29, Overall Diameter 4 in, Series XC1176, Backing Material Fiberglass, Backing Weight X, Grit 60, Maximum Operating Speed 15,300 RPM

    graingerSKU: null, mscSKU: null, zoro_no: G5574961, mongo_id: 65bbe5b83aaddbd5a9fe1265

    $4.71 / each
    Web price
    Qty
    Flap Disc, Type 29, 4" dia., 60 Grit
    SKU G5574961
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Medium, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 29, Overall Diameter 4 in, Series XC1176, Backing Material Fiberglass, Backing Weight X, Grit 60, Maximum Operating Speed 15,300 RPM

    graingerSKU: null, mscSKU: null, zoro_no: G5574961, mongo_id: 65bbe5b83aaddbd5a9fe1265

    $4.71 / each
    Web price
    Qty
  • Flap Disc, Type 27, 4" dia., 60 Grit
    SKU G4570148
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Medium, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 60, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R58, mscSKU: , zoro_no: G4570148, mongo_id: 65bbe7a09a749db82274a48b

    $3.33 / each
    Web price
    Qty
    Flap Disc, Type 27, 4" dia., 60 Grit
    SKU G4570148
    Categories Flap Disc
    Description Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Medium, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 in, Series XC1176, Backing Material Cloth, Backing Weight X, Grit 60, Maximum Operating Speed 15,300 RPM

    graingerSKU: 447R58, mscSKU: , zoro_no: G4570148, mongo_id: 65bbe7a09a749db82274a48b

    $3.33 / each
    Web price
    Qty
  • Flap Disc, T29, 7" x 5/8"-11, 80 Grit, PK5, Disc Type: Type 29A
    SKU G5134059
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 5/8 In.-11,80 Grit,PK5, Package Quantity 5

    graingerSKU: , mscSKU: , zoro_no: G5134059, mongo_id: 65bbe95522d7a989a994c064

    $52.86 / each
    Web price
    Qty
    Flap Disc, T29, 7" x 5/8"-11, 80 Grit, PK5, Disc Type: Type 29A
    SKU G5134059
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 5/8 In.-11,80 Grit,PK5, Package Quantity 5

    graingerSKU: , mscSKU: , zoro_no: G5134059, mongo_id: 65bbe95522d7a989a994c064

    $52.86 / each
    Web price
    Qty
  • Flap Disc, T29, 7" x 7/8", 80 Grit, PK10
    SKU G5133639
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 7/8 In.,80 Grit,PK10, Package Quantity 10

    graingerSKU: null, mscSKU: null, zoro_no: G5133639, mongo_id: 65bbe6aa3aaddbd5a9045b52

    $95.44 / each
    Web price
    Qty
    Flap Disc, T29, 7" x 7/8", 80 Grit, PK10
    SKU G5133639
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 7/8 In.,80 Grit,PK10, Package Quantity 10

    graingerSKU: null, mscSKU: null, zoro_no: G5133639, mongo_id: 65bbe6aa3aaddbd5a9045b52

    $95.44 / each
    Web price
    Qty
  • Flap Disc, T29, 7" x 5/8"-11, 60 Grit, PK5, Disc Type: Type 29A
    SKU G5134022
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 5/8 In.-11,60 Grit,PK5, Package Quantity 5

    graingerSKU: null, mscSKU: null, zoro_no: G5134022, mongo_id: 65bbe5db3aaddbd5a9fef9ec

    $61.19 / each
    Web price
    Qty
    Flap Disc, T29, 7" x 5/8"-11, 60 Grit, PK5, Disc Type: Type 29A
    SKU G5134022
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 5/8 In.-11,60 Grit,PK5, Package Quantity 5

    graingerSKU: null, mscSKU: null, zoro_no: G5134022, mongo_id: 65bbe5db3aaddbd5a9fef9ec

    $61.19 / each
    Web price
    Qty
  • Flap Disc, T29, 7" x 7/8", 60 Grit, PK10
    SKU G5133611
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 7/8 In.,60 Grit,PK10, Package Quantity 10

    graingerSKU: , mscSKU: , zoro_no: G5133611, mongo_id: 65bbe92f22d7a989a993da8b

    $95.49 / each
    Web price
    Qty
    Flap Disc, T29, 7" x 7/8", 60 Grit, PK10
    SKU G5133611
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 7/8 In.,60 Grit,PK10, Package Quantity 10

    graingerSKU: , mscSKU: , zoro_no: G5133611, mongo_id: 65bbe92f22d7a989a993da8b

    $95.49 / each
    Web price
    Qty
  • Flap Disc, T29, 7" x 5/8"-11, 40 Grit, PK5, Abrasive Material: Zirconia Alumina
    SKU G5134040
    Categories Abrasives & Polishers , Flap Disc
    Description Flap Disc,T29,7 In. x 5/8 In.-11,40 Grit,PK5, Package Quantity 5
    $52.86 / each
    Web price
    Qty
    Flap Disc, T29, 7" x 5/8"-11, 40 Grit, PK5, Abrasive Material: Zirconia Alumina
    SKU G5134040
    Categories Abrasives & Polishers , Flap Disc
    Description Flap Disc,T29,7 In. x 5/8 In.-11,40 Grit,PK5, Package Quantity 5
    $52.86 / each
    Web price
    Qty
  • Flap Disc, T29, 7" x 7/8", 40 Grit, PK10
    SKU G5133620
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 7/8 In.,40 Grit,PK10, Package Quantity 10

    graingerSKU: null, mscSKU: null, zoro_no: G5133620, mongo_id: 65bbe5fe3aaddbd5a9ffe23e

    $95.44 / each
    Web price
    Qty
    Flap Disc, T29, 7" x 7/8", 40 Grit, PK10
    SKU G5133620
    Categories Flap Disc
    Description Flap Disc,T29,7 In. x 7/8 In.,40 Grit,PK10, Package Quantity 10

    graingerSKU: null, mscSKU: null, zoro_no: G5133620, mongo_id: 65bbe5fe3aaddbd5a9ffe23e

    $95.44 / each
    Web price
    Qty
  • Flap Disc, T29, 6" x 5/8"-11, 80 Grit, PK5
    SKU G5134180
    Categories Flap Disc
    Description Flap Disc,T29,6 In. x 5/8 In.-11,80 Grit,PK5, Package Quantity 5

    graingerSKU: , mscSKU: , zoro_no: G5134180, mongo_id: 65bbe6863aaddbd5a9037624

    $31.11 / each
    Web price
    Qty
    Flap Disc, T29, 6" x 5/8"-11, 80 Grit, PK5
    SKU G5134180
    Categories Flap Disc
    Description Flap Disc,T29,6 In. x 5/8 In.-11,80 Grit,PK5, Package Quantity 5

    graingerSKU: , mscSKU: , zoro_no: G5134180, mongo_id: 65bbe6863aaddbd5a9037624

    $31.11 / each
    Web price
    Qty