M6.5 Fastners Flashcards
What are screw threads measured with?
Thread pitch gague
What are the classes or fit for screws?
1 loose
2 free
3 medium
4 close
5 tight
What is then flank on a thread?
Slope between root and crest
What is the major diameter for male and female?
Male = crest to crest
Female = root to root
What is the minor diameter for male and female?
Male = root to root
Female = crest to crest
What is BSF?
British standard thread
What doe BSW, BSP and BSF stand for?
British standard whitworth, British standard pipe, British standard fine
What angle is the BSF?
55 degrees
What angle is the British association?
47.5 degrees
What is the American national thread angles?
60 degrees
Where are fine threads used?
Vibration prone areas
What direction can square threads go?
Both directions
What direction can buttress threads go?
One direction
What direction can acme threads go?
Both directions
What does X mean in materials identification of bolts?
Steel
What does - mean in material identification of bolts?
Corrosion resistant steel
What does - - mean in material identification of bolts?
Aluminium
What does the triangle mean in material identification of bolts?
Close tolerance
What load do Clovis bolts carry?
Shear
What load do eye bolts carry?
Tension
What does a internal wrenching bolt need under its head?
Washer
Describe low temp self locking nuts
. 121 degrees max
. Nylon cuts
Describe high temp self locking nuts
. 121 degrees minimum
. Friction locked
What are anchor nuts used for?
Panels removed regularly
Where are tinnerman nuts used?
Are with chance of magnetic field
What is a stud?
Shaft threaded at both ends
Describe a standard stud
Same throughout
Describe a waisted stud
Weight saved throw minimised thread
Describe a stepped stud
Anchorage in soft materials, has a step up
Describe shouldered studs
Lateral rigidity, different diameters
What 3 ways are studs removed?
Stud box, stud insertion tool, lock nuts
What is used to repair a thread?
Heli coil
What is a heli coil?
. Replaces thread
. 1/2 pitch below surface
What’s are the 3 screws?
. Machine
. Structural
. Self tapping
What is a dowel?
Alignment tool
What’s a spring washer
Friction locking
Can a tab washer be reused?
No
When can a shakeproof locker be reused?
If springiness is retained
What does a heavy duty dzus faster have?
Grommet
What loads does a taper pin carry
Shear
What materials are split pins
Carbon or cress
What should you ensure with a gib head key
Goes in certain depth only
What does 426 mean?
Countersunk
What does 470 mean?
Universal
What is the diameter and length measured in with rivets?
Diameter 1/32
Length 1/16
What is a 1100 rivet?
Plain head, A
What is a 2117 rivet?
Dimple head, AD
What is a 5056 rivet?
Cross, B
What is a 2024 rivet?
Double lines, DD
What is a 7050 rivet?
Circle, E
What is a 2017 rivet?
Triangle, D
What are CRES rivets used for?
Firewalls
How is Monel identified in rivets?
Two dots
What does special or blind rivets access?
One side
What rivets do huck lock replace?
Solid shank rivets
What’s the difference between cheery lock and max?
Cherry max only requires one tool
What does an Olympic lock require?
Specific tool
What does a hi lock have?
Internal thread