What is the semi tubular rivet?

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A “semi-tubular rivet” has a manufactured head on one end and tubular shank hole-depth of less than 112% of the shank diameter of the rivet. A “tubular rivet” has shank hole-depth equal to or greater than 112% of the shank diameter. Semi tubular rivets can be classified as oval head semi tubular rivets, truss head semi tubular rivet, flat head semi tubular rivets, countersunk head semi tubular rivet in accordance with the head shape of rivets. The common materials used are steel, stainless steel, aluminum, brass, and copper. Rivet plating and coating options are selected by end user dependent on the application.

Semi-tubular rivets (also known as tubular rivets) are similar to solid rivets, except they have a partial hole (opposite the head) at the tip. The purpose of this hole is to reduce the amount of force needed for application by rolling the tubular portion outward. The force needed to apply a semitubular rivet is about 1/4 of the amount needed to apply a solid rivet. Tubular rivets can also be used as pivot points (a joint where movement is preferred) since the swelling of the rivet is only at the tail.

semi tubular rivet

semi tubular rivets dimension

Why Choose Semi Tubular Rivets?

• High speed assembly. Rivets feed automatically in impact Rivet machines that cycle in approximately 3/10th of a second. Spin/orbital methods of clinching cycle in approximately 5-8 seconds
• Can be clinched in impact rivet machines or in spin/orbital/radial style rivet machines. Air, hydraulic or mechanical presses and hand clinch tools can also be used
• Clinch force required to fasten is typically less than 40% of solid rivets so a less expensive assembly machine is required
• Permanent fastener with good joint strength
• Ease of joint inspection
• Rivet clinches can be roll-clinched, segmented (star set), spun, flared or press clinched
• Can be used to fasten similar or different materials of multiple work-pieces. Can be applied to tightly fasten joints together or used in hinged assemblies
• Tubular-hole rivets often used to pierce and clinch materials (leather-corrugated-plastic-rubber-fabric) without a pre-drilled or punched work-piece hole
• Rivets can also be used with a rivet cap to improve appearance of clinched end
• Long length rivets can be applied without buckling or bending the rivet shank
• Inexpensive alternative to threaded fasteners
• Virtually no scrap is produced during the manufacturing process
• Easily adapted for automation

Oval or truss head semi tubular rivets are the most common ones, the dimension of oval semi tubular rivet please refer to the following chart.

STANDARD OVAL HEAD SEMI-TUBULAR RIVET DIMENSIONS
Shank Diameter		Head Diameter		Head Thickness		Approx Head Radius	Hole Diameter		Hole Depth	Max. Fillet Radius head to shank
Max	Min	Max	Min	Max	Min	Ref	Max	Min	Nom	Max. Fillet Radius head to shank
0.061	0.058	0.114	0.104	0.019	0.015	0.16	0.044	0.039	0.046	0.008
0.089	0.085	0.152	0.142	0.026	0.02	0.22	0.068	0.062	0.064	0.012
0.099	0.095	0.192	0.182	0.032	0.026	0.27	0.076	0.07	0.077	0.012
0.123	0.118	0.223	0.213	0.038	0.03	0.31	0.09	0.084	0.094	0.016
0.146	0.141	0.239	0.229	0.045	0.035	0.27	0.107	0.1	0.126	0.02
0.188	0.182	0.318	0.306	0.065	0.055	0.25	0.141	0.134	0.155	0.025
0.217	0.21	0.444	0.43	0.075	0.061	0.63	0.163	0.155	0.189	0.025
0.252	0.244	0.507	0.493	0.085	0.071	0.72	0.184	0.176	0.219	0.03
0.31	0.302	0.57	0.554	0.1	0.086	0.69	0.219	0.211	0.243	0.03

semi tubular rivet picture

LML is specialized in manufacturing hardware metal parts, metal rivets are our superior products, we can manufacture different types of rivets in avariety of sizes and thicknesses in accordance with our customers' unique demand. We can produce aluminum semi tubular rivets, stainless steel semi tubular rivets, brass semi tubular rivets and copper semi tubular rivets. The picture below shows parts of our semi tubular rivets.

semi tubular rivets

We can do not only different kinds of semi tubular rivets, but all different kinds of metal rivets including solid rivets, hollow rivets, shoulder rivets, split rivets and mate rivets.