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Brass heat-set inserts M4 x 5 mm pack of 1000

Zoro Select

Zoro Select Heat-Set Insert M4-0.70 5 mm Brass Pack of 1000

SKU CH-678S-786JE

M4 heat-set brass inserts, 5 mm long, tapered shank for thermoplastic, pack of 1000

  • Product typeThreaded Inserts
  • M4 x 0.70 metric thread fits standard hardware
  • 5 mm overall length suits thin thermoplastic walls
  • Single-vane tapered shank increases pull-out resistance
  • Brass construction resists corrosion in finished assemblies
  • Pack of 1000 supports high-volume production runs

M4-0.70 brass heat-set inserts

These Zoro Select inserts provide M4-0.70 metric threads in thermoplastic parts. They install with heat or ultrasonic energy for a permanent bond. The pack contains one thousand pieces for volume production runs. Right-hand threads accept standard M4 fasteners.

Heat installation limits for thermoplastics

A tapered shank and single vane resist pull-out and rotation once cooled. The minimum material thickness is 3 3/8 mm and the maximum hole diameter is 5.9436 mm. Drill the pilot hole with a 0.226 in bit for proper interference. Exceeding these dimensions reduces retention strength.

Brass construction with flush flange

The plain-finish brass body measures 6.4 mm in diameter and 5 mm overall length. A 5.7404 mm tapered end guides insertion into the pilot hole. The flush flange sits level with the surface without a protruding lip. Brass offers corrosion resistance and thermal conductivity for reliable heating cycles.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $61.99
Pricier than about 78% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameZORO SELECT
Product typeThreaded Inserts

Questions about this item

Should I choose the M4-0.70 size or another thread pitch for my thermoplastic parts?

The M4-0.70 thread pitch matches standard metric M4 hardware. Select this size when your design calls for M4 screws and the 5 mm insert length fits your wall thickness.

What does the 5 mm overall length mean once the insert is installed in plastic?

The 5 mm length sits flush with the surface after heat setting. It provides full thread engagement in walls at least 3 3/8 mm thick while keeping the flange level with the part face.

How does the 6.4 mm insert diameter and 0.226 in drill size relate to the hole I need to mould or drill?

Drill or mould a 0.226 in hole; the 6.4 mm insert diameter with its 5.7404 mm tapered end and single vane creates pull-out resistance as the plastic flows into the vane during installation.

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