5/16.18 UNC LEFT HAND Coventry Die Head Chaser sets HSS set 5/16x18 (Suitable for 1/2 Diehead) S20 grade for free cutting steels
UNC HSS Coventry Chasers > i) 5/16.18 UNC LEFT HAND Coventry Die Head Chaser sets HSS set 5/16x18 (Suitable for 1/2 Diehead) S20 grade for free cutting steels
LEFTHAND Thread Chasers die set for 1/2" (12mm) coventry diehead 5/16X18 UNC Note: These chasers also fit Herbert diehead copies such as Rubometric & OSG