Express Express XL
Part Notes Price Cost Qty Subtotal Subtotal Qty Subtotal Subtotal
Assembly Tools - 3mm Hex Driver No plastic bag $5.00 $1.80 1 $5.00 $1.80 1 $5.00 $1.80
Assembly Tools - 8mm Thin Wrench No plastic bag $3.00 $0.10 1 $3.00 $0.10 1 $3.00 $0.10
Eccentric Spacer Rev A --- $2.00 $0.35 5 $10.00 $1.75 5 $10.00 $1.75
M2.5 Screw Pre-assembled in the electronics box. $0.15 $0.010 8 $1.20 $0.08 8 $1.20 $0.08
M3 Flat Head Screw - 16mm 2mm Hex Drive $0.15 $0.014 8 $1.20 $0.11 8 $1.20 $0.11
M3 Flat Head Screw - 30mm 2mm Hex Drive $0.25 2 $0.50 --- 2 $0.50 ---
M3 Locknut Pre-assembled in electronics box $0.10 $0.016 4 $0.40 $0.06 4 $0.40 $0.06
M3 Screw - 12mm --- $0.15 $0.014 16 $2.40 $0.22 16 $2.40 $0.22
M3 Screw - 35mm Pre-assembled in electronics box $0.25 $0.03 4 $1.00 $0.12 4 $1.00 $0.12
M5 Flange Locknut --- $0.20 $0.09 34 $6.80 $3.06 34 $6.80 $3.06
M5 Screw - 10mm --- $0.15 $0.026 56 $8.40 $1.45 72 $10.80 $1.87
M5 Screw - 16mm --- $0.20 $0.033 14 $2.80 $0.46 14 $2.80 $0.46
M5 Screw - 20mm --- $0.23 $0.038 12 $2.76 $0.45 12 $2.76 $0.45
M5 Screw - 25mm --- $0.26 $0.042 2 $0.52 $0.08 2 $0.52 $0.08
M5 Screw - 30mm --- $0.30 $0.056 12 $3.60 $0.67 12 $3.60 $0.67
M5 Screw - 40mm --- $0.40 $0.075 8 $3.20 $0.60 8 $3.20 $0.60
Nut Bar - 20mm Rev A --- $1.50 $0.45 2 $3.00 $0.90 2 $3.00 $0.90
Nut Bar - 40mm Rev A --- $1.75 $0.56 11 $19.25 $6.16 15 $26.25 $8.40
Nut Bar - 60mm Rev B --- $2.00 $0.68 17 $34.00 $11.56 21 $42.00 $14.28
Nut Bar - 140mm Rev A --- $3.00 $1.09 0 --- --- 2 $6.00 $2.18
Spacer - 6mm Rev A --- $0.20 $0.115 5 $1.00 $0.57 5 $1.00 $0.57
Spacer - 14.5mm --- $0.30 4 $1.20 --- 4 $1.20 ---
Standoff Pre-assembled in electronics box $0.50 $0.045 2 $1.00 $0.09 2 $1.00 $0.09
Tee Nut --- $0.45 $0.18 10 $4.50 $1.80 10 $4.50 $1.80
Wood Screw --- $0.05 $0.007 15 $0.75 $0.10 15 $0.75 $0.10
Zip Tie --- $0.10 $0.015 4 $0.40 $0.06 4 $0.40 $0.06
TOTAL 257 $117.88 $32.29 283 $141.28 $39.84

Component tests

Size and shape

Test Description Target Tolerance
Drive size Use the appropriate hex or nut driver to check the drive size of screws and nuts. M3, M5, 5.5mm, 8mm, etc N/A
Screw length Measure the length of screws with digital calipers. See BOM spec. +/- 0.5mm
Threads Measure threads of screws and nuts using a thread guage See BOM spec. N/A
Head diameter Measure the diameter of screw heads with digital calipers. See BOM spec. +/- 0.2mm
Head height Measure the height of screw heads with digital calipers. See BOM spec. +/- 0.2mm
Nut height Measure the height of nuts with digital calipers See BOM spec. +/- 0.2mm
Flange diameter Measure the diameter of locknut flanges with digital calipers. See BOM spec. +/- 0.2mm

Material and appearance

Test Description Target Tolerance
Material Ensure the material is aluminum or stainless steel and will not rust by holding a magnet to the part. Aluminum or stainless steel (no magnetic attraction) Weak attraction to stainless steel is permissible.

Function

Test Description Target Tolerance
Threading Fasten screws and nuts to reference mating component to ensure thread size and quality. Components should thread together smoothly. Test 10 pieces. N/A
Locking Tighten locknuts onto a screw and try to remove by hand. Locknut should resist being removed. Test 3 pieces. N/A