. Author manuscript; available in PMC: 2015 Oct 14.

Published in final edited form as: Dev Psychobiol. 2015 Apr 11;57(4):506–517. doi: 10.1002/dev.21305

Table 2.

Materials for Constructing the Head-Fix Device and Associated Costs

Component	Source	Quantity/Price	Cost/Device
18-8 stainless steel washer; ID: 15/16—; OD: 1/2—; thickness: 0.03–0.07—	McMaster Carr	100/$3.89	$0.08
18-8 stainless steel washer; for No. 0 screw size, ID 1/16—; OD: 5/32—	McMaster Carr	100/$1.27	$0.03
420 stainless steel hardened 6— × 6— sheet; thickness: 0.018—	McMaster Carr	1/$48.24	$1.34
18-8 Stainless steel slotted flat machine bolts, 2/56— × 5/16—	McMaster Carr	100/$3.60	$0.08
Plain 18-8 stainless steel nuts	McMaster Carr	100/$2.77	$0.06
Total price per device:			$1.59

These materials are associated with those illustrated in Figure 1.

The dimensions indicated for the large washer are appropriate for use with 6- to 8-day-old rats.