Quick List of Standard Pem Hardware Installation Sizes

Pem nut installation sizes
Prefix- (S)Steel - (CLS)Stainless Steel

Standard

Metric 
S-256-X 2-56 .166 S-M2-X M2 .166
S-440-X 4-40 .166 S-M2.5-X M2.5 .166
S-632-X 6-32 .187 S-M3-X M3 .166
S-832-X 8-32 .214 S-M3.5-X M3.5 .187
SS-032-X 10-32 .250 S-M4-X M4 .214
SS-024-X 10-24 .250 S-M5-X M5 .250
S-0420-X 1/4-20 .343 S-M6-X M6 .343
S-0428-X 1/4-28 .343 S-M8-X M8 .413
S-0518-X 5/16-18 .413
S-0524-X 5/16-24 .413
S-0616-X 3/8-16 .500
S-0624-X 3/8-24 .500


Pem stud installation sizes

Prefix- (FH)Steel - (FHS)Stainless Steel

Standard

Metric 
FH-256-X 2-56 .085 FH-M2.5-X M2.5 098
FH-440-X 4-40 .113 FH-M3-X M3 .120
FH-632-X 6-32 .139 FH-M3.5-X M3.5 .140
FH-832-X 8-32 .164 FH-M4-X M4 .156
FH-032-X 10-32 .190 FH-M5-X M5 .197
FH-024-X 10-24 .190 FH-M6-X M6 .236
FH-0420-X 1/4-20 .250 FH-M8-X M8 .316
FH-0518-X 5/16-18 .312

Pem standoff installation sizes
Thru hole Prefix- (SO)Steel - (SOS)Stainless Steel
Blind hole Prefix- (BSO)Steel  - (BSOS)Stainless Steel
Standard
  
Metric
SO-440-X 440 .166 SO-M3-X M3 .166
SO-6440-X 6440 .214 SO-3.5M3-X 3.5M3 .214
SO-632-X 632 .214 SO-M4-X M4 .281
SO-8632-X 8632 .281 SO-M5-X M5 .281
SO-832-X 832 .281
SO-032-X 032 .281

 
back to top

Length chart for Standoffs

 
Standard Metric
suffix = length in mm
Suffix(-X) length Suffix(-X) length
10 .312 3 3
12 .375 4 4
14 .437 6 6
16 .500 8 8
18 .562 10 10
20 .625 12 12
22 .687 14 14
24 .750 16 16
26 .812 18 18
28 .875 20 20
30 .937 22 22
32 1.00 25 25
34 1.062

 
back to top

Length chart for Studs

 
Standard Metric
suffix = length in mm
Suffix(-X) length Suffix(-X) length
4 .250 6 6
5 .312 8 8
6 .375 10 10
8 .500 12 12
10 .625 15 15
12 .750 18 18
14 .875 20 20
16 1.00 25 25
20 1.25 30 30
24 1.50 35 35

 
Bend Deductions
Tap Sizes
Material Gauges
Pem Chart
Drill Sizes
Screw Details
   
   
Lehi Sheet Metal, Corp.
info@lehisheetmetal.com
245 Flanders Rd. Westboro, MA 01602 Phone (508) 366-8550 fax(508) 870-1714