Complete specifications of single-drum and double-drum rivets (general industry standard, unit mm)

I. General basic information

1. Standard diameter (single drum/double drum share the main shaft diameter)

Standard series: φ 3.2, φ 4.0, φ 4.8 and φ 6.4 (most commonly used).

Minority customization: φ 2.4, φ 5.0, φ 8.0 (for heavy equipment)

Matching drilling size:

Φ3.2 → 3.3~3.4

Φ4.0 → 4.1~4.2

Φ4.8 → 4.9~5.0

Φ6.4 → 6.5~6.6

2. Standard head type (single drum and double drum)

Round head (flat round head): universal sheet metal, cabinet and frame.

90/120 countersunk head: smooth appearance, decorative panel and interior decoration.

Large brim (wide flange): plastic, glass fiber and thin plate are anti-crushing.

3. Material combination (common for both rivets)

Al-Fe, Fe (galvanized carbon steel), Al-stainless steel, all 304 stainless steel, all 316 stainless steel.

Second, the single-drum rivet standard specification (GB/T12618 structural single-drum rivet)

Single drum: a single bulge at the tail, with narrow riveting range and fewer segments with the same diameter and length.

1. φ 3.2 series (minimum light weight)

Total length l: 6, 7, 8, 9, 10, 12

Thickness of riveted plate: 1.0~3.5mm

Round head cap diameter: 5.85; Countersunk hat diameter: 6.8

2. Φ4.0 series (with the largest consumption)

Total length l: 6, 8, 10, 12, 14, 16

Thickness of riveted plate: 1.0~5.5mm

Round head cap diameter: 7.0; Countersunk hat diameter: 8.2

3. φ 4.8 series (medium load sheet metal)

Total length l: 8, 10, 12, 14, 16, 18, 20

Thickness of riveted plate: 1.5 ~ 9.0 mm.

Round head cap diameter: 9.0; Countersunk cap diameter: 10.5

4. φ 6.4 series (heavy single drum)

Total length l: 12, 16, 20, 25, 30

Thickness of riveted plate: 3.0~12mm

Round head cap diameter: 12.0; Countersunk cap diameter: 14.0

Single drum naming rules (common in the industry)

Rod diameter × total length, for example: 4012 = Φ4.0×12mm；; 4814 = Φ4.8×14mm

Third, the standard specifications of double-drum rivets (double-drum structure, two-stage bulging, larger riveting interval)

Double drum can compensate multi-layer, thickness difference and out-of-tolerance holes, with more optional lengths of the same diameter and wider riveting thickness range.

1. φ 3.2 double drum

Total length: 6, 8, 10, 12 and 14

Riveting thickness range: 1.0~4.5mm (1mm more than single drum)

2. φ 4.0 double drums (mainstream of automobile interior and household appliances)

Total length: 8, 10, 12, 14, 16, 18

Riveted plate thickness: 1.5~6.5mm, suitable for 2~3 laminated plates.

3. φ 4.8 double drum (explosion of chassis and vibration equipment)

Total length: 10, 12, 14, 16, 18, 20, 22

Riveted plate thickness: 2.0~10mm, which can make up for the interlayer gap of 0.5 ~ 1 mm.

4. φ 6.4 double drum (construction machinery, battery pack, heavy load)

Total length: 14, 16, 20, 25, 30, 35

Riveted plate thickness: 4.0~14mm, suitable for thick plate+composite layer.

Key dimension characteristics of double drum

After riveting, the front and rear double drums are formed: the front drum is ≈1.6 times the rod diameter, and the rear drum is ≈2.1 times the rod diameter. The tension and shear resistance are 20%~40% higher than that of a single drum of the same specification.

Selection reference

Single sheet, uniform thickness and low cost: single drum 3.2/4.0.

Multi-layered plate, vibration condition, plastic/glass fiber and poor hole accuracy: double drum 4.0/4.8.

Heavy frame, new energy battery pack and construction machinery: unified double drum φ 6.4.

The appearance is flat and without protrusion: choose countersunk head style; Thin plate anti-sag: enlarged brim type