SR( ), Self-locking and non-locking, various materials, finishes.
SR( ) Series = M45932/x-x : SR( )L Series = M45932/x-xL : SR( )L0004 : SR( )L0024 = M45932/x-xC : SR( )L0025 = M45932/x-xDL : SR( )L0036 = M45932/x-xAL : SR( )-0001 : SR( )-0004 : SR( )-0021 : SR( )-0024 = M45932/x-xCL : SR( )-0025 = M45932/x-xD : SR( )-0036 = M45932/x-xA

Short, self locking, 1025°F, silver plated.
SRQ( )L0074 = SAE AS3504-( ) & SBAC AS52760-63

Long self locking, 1025°F, silver plated.
SRQB( )L0074 = SAE AS3505-( ) & SBAC AS52790-93 & Rolls Royce U760329-30.

High strength, oversize.
SRW( ) = M45932/3-x : SRW( )L = M45932/3-xL : SRW( )L0024 = M45932/3-xCL : SRW( )L0025 = M45932/3-xDL : SRW( )L0036 = M45932/3-xAL : SRW( )-0001 : SRW( )-0021 : SRW( )-0024 = M45932/3-xC : SRW( )-0025 = M45932/3-xD : SRW( )-0036 = M45932/3-xA

SRM( )( ), Metric, Non-Locking, 235°C Dry Flim Lube

SRM( )( )L, Metric, Self Locking, 235°C Dry Film Lube

SRMW( ), Metric, Oversize Replacement, Non-locking, Internal Thread Lock, 235°C Dry Film Lube

SRMW( )L( ), Metric, Oversize Replacement, Self-locking, 235°C Dry Film Lube