|
&NT |
With Nut |
|
AN |
Precedes a dimensional specification for aircraft fasteners developed by the Aeronautical Standards Group. |
|
ASTM |
American Society for Testing and Materials. Used preceding a standard number developed by that group. |
|
BR |
Brass |
|
BSF |
British Standard Fine |
|
BSW |
British Standard Whitworth |
|
BT |
Bolt (on drawings) |
|
C |
National Coarse Thread |
|
CL |
Class (Metric Material/Strength Specification) |
|
CR |
Chrome |
|
CSS |
Counter Sunk Screw (flat or oval head) |
|
CT |
Course Thread |
|
DIN |
An abbreviation for Deutsches Institut f¨¹r Normung, the German standards body. In reference to fasteners DIN indicates fasteners that conform to a specific metric standard (will be followed by the standard number). |
|
F |
Fully Threaded |
|
FH |
Flat Head |
|
FIL |
Fillister Head |
|
FIN |
Finishing (Washer) |
|
FNDR |
Fender (Washer) |
|
FT |
Fine Thread, Fully Threaded |
|
G |
Grade |
|
Galv. |
Galvanized |
|
Galvi |
Galvanized |
|
GR |
Grade |
|
GV |
Galvanized |
|
HD |
Head |
|
HHMB |
Hex Head Machine Bolt |
|
HVHX |
Heavy Pattern Hex Bolt |
|
HX |
Hex |
|
JMNT |
Jam Nut |
|
LB |
Lag Bolt, weight in pounds |
| LH |
Left Hand Thread |
|
LW |
Lock Washer |
|
M |
Metric |
|
MB |
Machine Bolt |
|
MS |
Machine Screw |
|
MSNT |
Machine Screw Nut |
|
NC |
National Coarse Thread |
|
NF |
National Fine Thread |
|
NT |
Nut |
|
OH |
Oval Head |
|
OV |
Oval Head |
|
P |
Philips |
|
PH |
Philips Head |
|
Phil. |
Philips Drive |
|
PN |
Pan Head |
|
PT |
Partial Thread |
|
RD |
Round Head |
|
RH |
Round Head, or Right Hand Thread |
| S |
Slotted |
|
S/S |
Stainless Steel |
|
SAE |
SAE Pattern (Washers) These washers have a smaller outside diameter than USS pattern washers, Also used to indicate US Fine Thread |
|
SBR |
Silicon Bronze |
|
SD |
Square Drive |
|
SEMS |
A type of pre-made screw and washer assembly |
|
SKT |
Socket |
|
SL |
Slotted |
|
Slot. |
Slotted Drive |
|
SMS |
Sheet Metal Screw |
|
SQ |
Square |
|
SS |
Stainless Steel, Set Screw |
|
USS |
USS Pattern (washers). These washers have a larger outside diameter than SAE pattern washers, Also used to indicate US Course Thread |
|
WS |
Wood Screw |
|
Z |
Zinc |
| 
