Screws
Screws Metric
=3-48Fred's
#3-48 UNC 2A
Socket Cap
Button Cap
Phillips Cap
#3-48 UNC 2A
UNC = Unified National Coarse (type of thread)
48 TPI - UNC / Coarse (Standard) Thread
1/2"/13mm
3/4"/19mm
7/8"/22mm
#3 = the screw diameter. Slightly less than 1/10 of an inch (2.5 mm).
48 = 48 threads per inch
UNC = Unified National Coarse (type of thread)
2 = thread precision (average)
A = external thread (B = internal thread like on a nut)
The length of the mounting screw varies based on the thickness of phono cartridge body.
Typical lengths are 1/2 inch (13mm) to 7/8 inch (22 mm). The cartridge body has
a slot through which the fastening screw passes: the diameter of this slot is typically 1/8".
METRIC 2.5MM
Package included:
2 x M2.5*6mm Stainless Steel Hex Bolts
2 x M2.5*8mm Stainless Steel Hex Bolts
2 x M2.5*10mm Stainless Steel Hex Bolts
2 x M2.5*12mm Stainless Steel Hex Bolts
2 x M2.5*16mm Stainless Steel Hex Bolts
2 x M2.5*20mm Stainless Steel Hex Bolts
12 x M2.5 Stainless Steel Nuts
12 x M2.5 Stainless Steel Washers
2 x M2*10mm Stainless Steel Hex Bolts
2 x M2*16mm Stainless Steel Hex Bolts
4 x M2 Stainless Steel Nuts
4 x M2 Stainless Steel Washers
1 x 2mm Hex Key (for M2.5 hex bolts)
1 x 1.5mm Hex Key (for M2 hex bolts)