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Fasteners Any device used to hold 2 or more pieces of material together or in place Shank – long stem part of a nail/screw.

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Presentation on theme: "Fasteners Any device used to hold 2 or more pieces of material together or in place Shank – long stem part of a nail/screw."— Presentation transcript:

1 Fasteners Any device used to hold 2 or more pieces of material together or in place Shank – long stem part of a nail/screw

2 Laminate –Means to fasten 2 or more flat pieces together with an adhesive Adhesive - Sticky substance such as glue used to connect material together

3 Nails Fastener which is driven into material it holds ITEMS TO KNOW: Use of nail Desired length Desired diameter

4 Nail Lengths Penny – unit of measure used to designate the length of nails *Symbol – d - The number of English pennies needed to purchase 100 nails of a given size

5 Size Range Common nail – 2d to 60d Box nail – 2d to 40d Finishing nail – 2d to 20d Cut nail – 2d to 20d Spike – 16d to 12 inches (aka 1 foot)

6 –Common nail - general construction –Cut nail - used for nailing tongue & groove –Box nail – light household work Diameter – distance across the center of a circle

7 Types of Nails Finishing Nail – interior finished work Shingle Nail – nailing shingles Roofing Nail – used for rolled roofing Plaster Nail – attach plaster to studs

8 More Nails… Hinge Nail – fasten hinges (duh) Duplex Nail – electrical work & concrete Wire Staple – wire fence construction Lead Head Nail – nailing galvanized steel

9 Nail Resistance Factors 1. Shank Diameter 2. Shank Type 3. Wood Type/Hardness of Wood 4. Moisture Content – Drier is Better! 5. Angle of Nail to Grain of Wood 6. Location of Nail in Wood – End, Middle

10 Coated with zinc

11 Phillips – phillips head (X) Allen – 6 sided hole in head Gauge – diameter of shank –(2 - 24) –(6 – = common) Toggle Bolt – collapsible winged nut which opens when inserted in a hollow wall

12 Machine Bolt – square head with threads on just the last 1 of the shank Cap Screw Carriage Bolt – round head Stove Bolt – round headed bolt

13 Bolt Pitch Bolt Pitch – the number of threads per inch –Determined by: Measuring an inch on a bolt and then counting the threads within that inch Using a thread gauge

14 American National Standards Institute (ANSI) Thread Classification System Threading standards for bolts & nuts are controlled by ANSI

15 Example: Bolt size (Major Diameter) Pitch (Threads Per Inch) Unified Thread Standard Type of Thread (C = Coarse; F = Fine) Class of Fit (A = External; B = Internal) 1= Loose & Sloppy, 2 = Normal & Strong, 3 = Close, Tight, & Very Strong Bolt Length

16 Thread Classification ½ - 20 UN C/F – 1/2/3 – A/B/C x 3

17 Screws Fastener which has threads that bite into the material it fastens Threads – grooves of even shape & taper that wrap around the shank

18 Classifications of Screws Wood Cap Screws Sheet Metal Lag Screws –Could be classified by head shape

19 Square head – four equal sides Hex head – six sides Slotted – standard Plow bolt – square tapered head

20 Nuts Device with a thread hole Washer – flat device w/ a hole in the center & used as part of a fastener TYPES OF NUTS: Hex-square-castle-wing-lock

21 Types of Washers Flat External Lock Internal Lock Split Lock

22 Hardware – term describing material used in ag mechanics Hinge Object that pivots & permits a door to swing

23 TYPES OF HINGES Strap T Butt Hasp Butterfly Screw Hook

24 Gussets – used to reinforce joints Flush Plate – used to strengthen corners


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