Fasteners & Bone Screws

Fasteners & Bone Screws

Crist cranial fasteners are the new standard for security and bio-compatibility.

Formerly known as Head Bolts, our Fasteners and Bone Screws are available in a variety of sizes to secure delicate equipment to research models of all sizes. You can be confident that your study will go smoothly with Crist fasteners keeping your data gathering instruments secure—and your subjects healthier and more comfortable.

Crist is also pleased to offer the option of hydroxyapatite coating on stainless steel and titanium fasteners and bone screws. The new standard for 21st century bio-compatibility, this coating minimizes infection by speeding formation of surrounding tissue and creating a strong bio-safe bond with cranial bone. The result is healthier, more comfortable research subjects and dramatically reduced opportunity for infection that can interrupt expensive studies.

Features & Benefits In Brief

  • Cranial Implant Fasteners are available in Stainless Steel, Titanium and CILUX plastic, and several different sizes to meet your exacting needs.
  • They slip securely under the skull and are held in place with a double nut imbedded in dental acrylic.

Choose the material that’s right for your study protocol.
Fasteners are available in:

  • MRI-compatible CILUX – A Crist Instrument Company innovation, it offers strength, durability, and tissue compatibility that can be used in MRI testing and sterilized. CILUX does not absorb water or other fluids readily, so it resists miss-shaping. CILUX is also harder than many other plastics so threads resist slips.
  • Titanium – Very tissue compatible, it is strong, hard, and lightweight. Titanium may be used in the MRI, but casts a shadow, which may reduce the ability to visualize areas located close to the chamber.
  • Stainless Steel – Excellent when strength and durability are essential. This material is an excellent choice for larger subjects for whom the weight of the material will not cause discomfort.

General specifications:

  • Stainless steel and titanium fasteners are available in the following sizes: 6-32 x 1/2” (12.7mm long), 6-32 x 5/8” (15.87mm long), 6-32 x 7/16” (11.1mm long), 8-32 x 5/8” (15.98mm long).
  • CILUX cranial fasteners are available in the following sizes: 8-32 x 9/16” (14.28mm long), 10-32 x 5/8” (15.87mm long), 10-32 x 3/4” (19.05mm long), 10-32 x 9/16” (14.28mm long), 10-32 x .800” (20.32mm long), 1/4-20 x 5/8” (15.87mm long).
  • 6-CRANIAL FASTENERS (HEAD BOLTS) – STAINLESS STEEL packaged in sets of 5
  • 6-YCI-06 Cranial Fasteners, w/nuts & washer, 6-32 x 1/2” (12.7mm long)
  • 6-YCI-06L Cranial Fasteners, w/nuts & washer, 6-32 x 5/8” (15.87mm long)
  • 6-YCI-08 Cranial Fasteners, w/nuts & washer, 8-32 x 5/8” (15.98mm long)
  • 6-CRANIAL FASTENERS (HEAD BOLTS) – TITANIUM packaged in sets of 3 or 5 (for sets of 3 add a -3 to your choice below; for sets of 5 add a “-5” to your choice below.
  • 6-YCX-06 Cranial Fasteners, w/nuts & washer,
  • 6-YCX-06L Cranial Fasteners, w/nuts & washer 6-32 x 5/8” (15.87mm)
  • 6-YCX-08 Cranial Fasteners, w/nuts & washer (Formerly YCX-02)
  • 6-CRANIAL FASTENERS (HEAD BOLDS) – “CILUX” (packaged in sets of 5)
  • 6-YCJ-08 Cranial Fasteners, w/nuts & washer 8-32 x 9/16”
  • 6-YCJ-10 Cranial Fasteners, w/nuts & washer 10-32 x 5/8”
  • 6-YCJ-10L Cranial Fasteners, w/nuts & washer 10-32 x 3/4”
  • 6-YCJ-10S Cranial Fasteners, w/nuts & washer 10-32 x 9/16”
  • 6-YCJ-10P Cranial Fasteners, w/nuts & washer with reinforced head 10-32 x .800”
  • 6-YCJ-14 Cranial Fasteners, w/nuts & washer 1/4-20 x 5/8”

Self-tapping Bone Screws (available in titanium only) thread into the skull and are available in two sizes. These screws have a left-hand taper thread, require a small wrench to tighten, and are available in the following sizes:

  • Larger animals: .105” thread diameter (2.6 mm), .219” (5.5 mm) thread length and an overall length of .320” (8.1 mm long).

When ordering please specify the:

  • Item Number / Quantity
  • Size
  • Type
  • Material

SELF-TAPPING BONE SCREWS – TITANIUM packaged in sets of 3 sets of 5 and sets of 12

  • These Bone Screws have a left hand Taper Thread and require a small wrench to tighten. Screws have a .105” thread diameter (2.6 mm) x .219” (5.5mm long) thread length and an overall length of .320” (8.1 mm).
  • 6-YCX-033 Bone Screws, Allen Head Set of Three
  • 6-YCX-035 Bone Screws, Allen Head Set of Five and 1 AllenWrench
  • 6-YCX-0312 Bone Screws, Allen Head Set Of Twelve and 1 AllenWrench
  • 6-SPAW-3/32 Allen Wrench 3/32
  • NOTE: To avoid drilling too deep, remember to always use a 6-T50 depth gauge with your self-tapping bone screws
  • 6-YCX-04 Used for rats
  • CRANIAL FASTENERS, 00 Self tapping bone screw with a wire solder terminal on the head straight blade. Screws have a .047” thread diameter x .0939” thread length and an overall length of .1419”.

When ordering please specify the:

  • Type desired
  • Material desired
  • Preference for coated or un-coated
  • Number desired

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