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Bolt 1/4" x 1 3/4" 26TPI
BSC/CEI/BSF

Bolt 1/4" x 3" 26TPI
BSC/CEI/BSF

Bolt 1/4" x 2 1/2" 26TPI
BSC/CEI/BSF Thread

Bolt 5/16" x 1/2" 26TPI
BSC/CEI Thread

Bolt 5/16" x 1 1/4" 26TPI
BSC/CEI Thread

Bolt 5/16" x  length under head 1 3/8" 26TPI cinc plated
BSC/CEI Thread

Bolt 5/16" x 1 1/2" 26TPI
BSC/CEI Thread

AJS/Matchless Inlet. Exhaust Valve 500cc
AJS 500 cc1949-51 Mod. 18. 18S. 18C. 1952-53 Mod. 18. 18S. 18C. 18CS.1956-59  Mod. 18. 18S. 18C. 18CS.1956-59  Mod. 18 18S1956 Mod. 18CSMatchless 500 cc1949-51  Only inlet G80. G80S. G80C1952-53 Mod. G80. G80S. G80C. G80CS1954-55 Mod. G80. G80S. G80C. G80CS1956-59 Mod. G80S1956 B80CS 
Length 103.3mm = 4.060"
Head. 43mm = 1.690"
Shaft: 9.5mm = 0.373Please note: inlet and exhaust are the same size, these can be numbered with 01-3988 or 01-3989Suitable Valve Collets 00-0686

Bolt 5/16" x 2 1/2" 26TPI
BS/CEI

Bolt 5/16" x 2" 26TPI
BSC/CEI Thread

Bolt 3/8" x 3/4" 26TPI
BSC/CEI Thread

Bolt 3/8" x 1/2" 26TPI
BSC/CEI Thread
Oil level Plug BSA 250,350,500cc Single Cylinder Metal Primary Chain Case

Bolt 3/8" x 1" 26TPI
BSC/CEI Thread

Bolt 1.1/4" x 3/8" x 26TPI
BSC/CEI Thread

Bolt 3/8" x 1 3/4" 26TPI
BSC/CEI Thread

Bolt 3/8" x 3" 26TPI
BSC/CEI Thread

Bolt 1/4" x 1/2"
UNF Thread

Bolt 1/4" x 3/4"
UNF Thread

Bolt 1/4" x 1" 
UNF Thread

Bolt 1/4" x 1 1/2"
UNF Thread

Bolt 1/4" x 2 1/2"
UNF Thread

Bolt 1/4" x 3"
UNF Thread

Bolt 1/4" x 2" UNF Thread

Bolt 5/16" x 1/2"
UNF Thread. 24Tpi.

Bolt 5/16" x 3/4"
UNF Thread