Flat Head Round Body Rivet Nut
Rivet Nuts (Insert Nuts)

Flat Head Round Body Rivet Nut, Open & Closed End

Flat head, round knurled body, open or closed end. M3 to M16, carbon steel, zinc plated.

Section
Rivet nuts
Type
Steel rivet nuts
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Overview

A rivet nut (insert nut) gives a strong, reusable thread in sheet metal, tube or plastic that is too thin to tap. It is fitted from one side with a hand or pneumatic tool. The wide flat head spreads the load and covers slightly oversized holes. The plain round body is the simplest type to fit in a drilled round hole. Also made with a closed end: the closed end seals the thread against water, dust and paint, and protects parts behind the panel. Pick the end in the size list.

Available in M3, M4, M5, M6, M8, M10, M10(12H), M12, M12(16H), M16 with grip ranges from 0.5 mm to 6.5 mm. Each part number covers a set range of sheet thickness and has its own overall length (L), shown in the table. Dimensions follow the supplier catalogue (YLB 2025).

Specifications

BrandSGPFS
Part no. seriesSGFR01OE… (open end), SGFR01CE… (closed end)
ThreadsM3, M4, M5, M6, M8, M10, M10(12H), M12, M12(16H), M16
Grip range0.5 mm to 6.5 mm
Length (L)10 mm to 33 mm (open end); 15 mm to 44 mm (closed end, L1)
HeadFlat head
BodyPlain round body
EndOpen end, or closed end (blind, sealed)
MaterialCarbon steel, zinc plated (stainless steel and aluminium on request)

Sizes & part numbers

All dimensions in mm. One row per grip range. The 2D drawing shows where each letter is measured.

Open end

Part no.ThreadMaterialGrip range
min–max		Hole size
+0.1 / 0		Body D
+0.07 / −0.10		Head BHead KLength L
±0.30
SGFR01OEM3100515M3C0.5–1.55.04.98.00.810.0
SGFR01OEM3111525C1.5–2.55.04.98.00.811.0
SGFR01OEM4110520M4C0.5–2.06.05.99.00.811.0
SGFR01OEM4132035C2.0–3.56.05.99.00.813.0
SGFR01OEM5130520M5C0.5–2.07.06.910.01.013.0
SGFR01OEM51652035C2.0–3.57.06.910.01.016.5
SGFR01OEM6150525M6C0.5–2.59.08.912.31.215.0
SGFR01OEM61952545C2.5–4.59.08.912.31.219.5
SGFR01OEM8181035M8C1.0–3.511.010.914.51.518.0
SGFR01OEM8213560C3.5–6.011.010.914.51.521.0
SGFR01OEM10211040M10C1.0–4.013.012.917.01.721.0
SGFR01OEM10244065C4.0–6.513.012.917.01.724.0
SGFR01OEM10H12191040M10 (hole 12)C1.0–4.012.011.916.01.619.0
SGFR01OEM12221040M12C1.0–4.015.014.918.01.822.0
SGFR01OEM12254065C4.0–6.515.014.918.01.825.0
SGFR01OEM12H16251040M12 (hole 16)C1.0–4.016.015.922.02.025.0
SGFR01OEM12H16284065C4.0–6.516.015.922.02.028.0
SGFR01OEM16332050M16C2.0–5.021.020.926.02.533.0

Closed end (blind)

Part no.ThreadMaterialGrip range
min–max		Hole size
+0.1 / 0		Body D
+0.07 / −0.10		Head BHead KLength L1
±0.30
SGFR01CEM3150515M3C0.5–1.55.04.98.00.815.0
SGFR01CEM3161525C1.5–2.55.04.98.00.816.0
SGFR01CEM4160520M4C0.5–2.06.05.99.00.816.0
SGFR01CEM4182035C2.0–3.56.05.99.00.818.0
SGFR01CEM5170520M5C0.5–2.07.06.910.01.017.0
SGFR01CEM5192035C2.0–3.57.06.910.01.019.0
SGFR01CEM61920525M6C0.5–2.59.08.912.31.219.2
SGFR01CEM6212545C2.5–4.59.08.912.31.221.0
SGFR01CEM82151035M8C1.0–3.511.010.914.51.521.5
SGFR01CEM8243560C3.5–6.011.010.914.51.524.0
SGFR01CEM10271040M10C1.0–4.013.012.917.01.727.0
SGFR01CEM10304065C4.0–6.513.012.917.01.730.0
SGFR01CEM10H12251040M10 (hole 12)C1.0–4.012.011.916.01.625.0
SGFR01CEM12381040M12C1.0–4.015.014.918.01.838.0
SGFR01CEM12414065C4.0–6.515.014.918.01.841.0
SGFR01CEM12H16411040M12 (hole 16)C1.0–4.016.015.922.02.041.0
SGFR01CEM12H16444065C4.0–6.516.015.922.02.044.0

Material: C = Carbon steel. Part number = SG + type + grade (01 carbon steel, 02 aluminium, 034 stainless steel SS 304) + end (OE open, CE closed) + thread + length + grip range. Example: SGFK01OEM6150525 = flat head knurled, carbon steel, open end, M6, length 15, grip 0.5–2.5 mm.

How it works

A rivet nut gives a strong, reusable thread in sheet metal, tube or plastic that is too thin to tap, and it is fitted from one side only. Here is how this nut goes in.

1 Make the holeDrill or punch a round hole tothe size in the table. Noaccess to the back is needed.2 Insert the nutPush the nut in until the headsits on the sheet.3 Set itThe tool pulls the thread up:the thin wall behind the sheetfolds into a tight collar andclamps.4 FastenScrew in the bolt to fix thepart. The thread can be usedagain and again.
Installation in four steps (simplified illustration).

Plain round body

A smooth round body for a round hole. It is the simplest type to fit; for higher torque choose a knurled or hex body.

thin sheetthick sheet

Choosing the grip

Each part number sets in a range of sheet thickness (the grip). Pick the part whose grip covers your sheet: too thin and the collar will not clamp, too thick and the nut cannot fold. The hole size is in the table.

Open or closed end

Open end: the thread runs right through, so a longer bolt can pass. Closed end: the end is sealed, keeping water, dust and paint out of the thread and protecting parts behind the panel. Pick the end in the size list above.

Head

Flat head: a wide head that spreads the load and covers the hole edge.

Setting tools

Set with a hand, pneumatic-hydraulic or battery tool fitted with the matching mandrel. See our riveting tools.

Key features

  • Wide flat head spreads the load
  • Plain round body for a round hole
  • Open or closed end

Applications

Electrical panels and enclosuresAutomotiveFurnitureSolar structures
Need a size, grade or finish not listed?We also supply special and non-standard parts to drawing.Send enquiry

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