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Prime Line B 512 Concave Edge Spring Tension Roller Assembly
Prime Line B 512 Concave Edge Spring Tension Roller Assembly, 1 in Dia X 1/4 in W, 2 Roller, Plastic
Our Price: $2.99

Consists of 1/4"W center groove wheel, Heat treated, high tension adjustable steel M-spring. Used by several patio door manufacturers.
Prime Line B 638 Concave Edge Spring Tension Roller Assembly
Prime Line B 638 Concave Edge Spring Tension Roller Assembly, 1 in Dia X 1/4 in W, 2 Roller, Plastic
Our Price: $2.99

Used by Metal Industries. Center grooved, 1/4"W, roller. 1-3/4"L, high-tension, heat-treated steel spring. Includes No.8 x 3/8" Phillips sheet metal screw.
Prime Line B 521 Concave Edge Spring Tension Roller Assembly
Prime Line B 521 Concave Edge Spring Tension Roller Assembly, 1 in Dia X 1/4 in W, 2 Roller, Plastic
Our Price: $2.99

1/4"W center groove nylon wheel, high tension 2-1/2"L heat-treated steel spring, and No.8 x 3/8" Phillips pan head sheet metal screw.
Prime Line B629 Flat Edge Sliding Door Roller Assembly
Prime Line B629 Flat Edge Sliding Door Roller Assembly, 3/4 in Dia x 1/4 in W, 2 Roller, Nylon
Our Price: $2.99

Used on Croft and Keller sliding screen doors. 1/4"W x 3/8"Dia flat nylon ball bearing wheel with 3/8" threaded hex hub. Includes 2 rollers and 2 fasteners.
Prime Line B 609 Concave Edge Spring Tension Roller Assembly
Prime Line B 609 Concave Edge Spring Tension Roller Assembly, 1 in Dia X 1/4 in W, 2 Roller, Plastic
Our Price: $2.99

Bent spring design used by Academy Mfg. and others. Center grooved 5/16"W wheel, 2-1/4"L x 5/16"W flat high-tension heat-treated steel spring, and No.8 x 3/8" Phillips sheet metal screw.
Prime Line B551 Bottom Mount Sliding Door Roller Assembly
Prime Line B551 Bottom Mount Concave Edge Sliding Door Roller Assembly, 1 in Dia x 7/32 in W
Our Price: $2.99

Plastic roller with narrow center groove 7/32"W nylon wheel, concave edge. Includes a 8-32 x 3/8" machine screw with binder post nut. Fits on Air Control doors.
Prime Line B515 Sliding Spring Tension Door Roller Assembly
Prime Line B515 Concave Edge Sliding Spring Tension Door Roller Assembly, 1-1/4 in Dia x 1/4 in W
Our Price: $3.79

Used as top and bottom roller by several patio door manufacturers. Consists of 1/4"W center groove nylon wheel, 2"L x 3/8"W steel housing, high-tension heat-treated steel spring.
Prime Line B570 Sliding Spring Tension Door Roller Assembly
Prime Line B570 Concave Edge Sliding Spring Tension Door Roller Assembly, 1 in Dia x 1/4 in W
Our Price: $3.79

Used by several patio door manufacturers. Consists of 1/4"W center groove wheel, high-tension heat-treated steel v-spring (2"L before and 2"L after bend).
Prime Line B 649 Concave Edge Spring Tension Roller Assembly
Prime Line B 649 Concave Edge Spring Tension Roller Assembly, 1 in Dia X 1/4 in W, 2 Roller, Plastic
Our Price: $3.99

Plastic center grooved wheel with steel housing, high-tension steel spring. Fits on Columbia Uni-fit doors. Contents: 2 roller assemblies.
Prime Line B518 Sliding Screen Tension Door Roller Assembly
Prime Line B518 Concave Edge Sliding Screen Tension Door Roller Assembly, 1 in Dia x 1/4 in W
Our Price: $4.29

Used as top and bottom roller. Plastic wheel with center groove. 1-7/8"L housing, heat treated, high tension steel spring, and No.8-32 x 1-1/4" Phillips pan head screw.
   
 
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