Spaenaur

SCREWS & BOLTS (General Data)
Données générales sur les VIS et les BOULONS
Inch
Pouces
B
SIZES
Items with SPAENAUR part numbers listed on the following pages are considered to be off-the-shelf
sizes. Other special sizes and materials are available, usually in production quantities. Let us know your
requirements, and we will gladly quote.
MATERIALS
Headings on each page indicate the materials we stock—steel, brass, stainless steel, nylon, etc. Other
materials, i.e., special stainless, bronze, plastics, etc., are available on special order. Please ensure that
the correct material is being ordered for your requirement.
FINISHES
Standard stocked finishes applying to each are indicated in the headings or footnotes on each page.
Other finishes can be supplied special to order at additional cost. Due to environmental reasons and high
costs, cadmium electroplate is being phased out by the fastener industry.
PACKING
All items can be supplied in standard unit packages or in bulk. Unit package quantities are shown in price
list - usually 100, 50, or 25 pieces. When ordering very large quantities for manufacturing purposes, it
will pay to specify bulk packing.
METRIC and INCH
Inch products are indicated in BLACK print. Metric products are indicated in BLUE print.
DIAMETER UNC COARSE UNF FINE
OF BOLT THREAD THREAD
(INCHES) SERIES SERIES
No. 0 - 80
No. 1 64 72
No. 2 56 64
No. 3 48 56
No. 4 40 48
No. 5 40 44
No. 6 32 40
No. 8 32 36
No. 10 24 32
No. 12 24 28
THREADS - MACHINE SCREW AND BOLT SIZES
NUMBER OF THREADS PER INCH - UNIFIED STANDARD
DIAMETER UNC COARSE UNF FINE
OF BOLT THREAD THREAD
(INCHES) SERIES SERIES
1/4 20 28
5/16 18 24
3/8 16 24
7/16 14 20
1/2 13 20
9/16 12 18
5/8 11 18
3/4 10 16
7/8 9 14
1 8 14 (12)*
Coarse Thread Series, Class 2A Fit, recommended for general bolt use.
HOW TO MEASURE
DIAMETER UNC COARSE UNF FINE
OF BOLT THREAD THREAD
(INCHES) SERIES SERIES
1-1/8 7 12
1-1/4 7 12
1-3/8 6 12
1-1/2 6 12
1-3/4 5 -
2 4-1/2 -
2-1/4 4-1/2 -
2-1/2 4 -
2-3/4 4 -
3 4 -
*Indicates number of threads per inch for Unified Fine (1"-12 thread is U.N.F. standard. However 1"-14 thread is popular demand and generally stocked in
place of 1"-12.)
LENGTH
LENGTH
CATALOG 13
OVAL ROUND FLAT BINDING FILLISTER TRUSS HEXAGON HEX. SLOT CARRIAGE
The length of screws and bolts is measured from the largest
diameter of the bearing surface to the extreme point.
CORROSION GUIDE - see Section R.
B2