Racing Components Logo  S-Spring Receptacle Picture

To order, add up the thickness of the panels being joined together, as shown here. Next, locate the total thickness on the chart. The part number is shown under the head style (oval or flush).

4639-165 Oval Head or RACEX® Oval Head Fastener
and 4639-19 S-Spring Receptacle

Total Material Thickness (inches) Stud Grip Spring Height Oval Head Stud Picture S-Spring Part Number
Oval Head Stud Part Number RACEX® Oval Head Stud Part Number
.099-.132 .500 .425 4639-165-500 RACEX-A6550-Z3CT 4639-196-425
.124-.157 .400 .300 4639-165-400 RACEX-A6540-Z3CT 4639-196-300
.149-.182 .550 .425 4639-165-550 RACEX-A6555-Z3CT 4639-196-425
.174-.207 .400 .250 4639-165-400 RACEX-A6540-Z3CT 4639-196-250
.199-.232 .400 .225 4639-165-400 RACEX-A6540-Z3CT 4639-196-225
.224-.257 .500 .300 4639-165-500 RACEX-A6550-Z3CT 4639-196-300
.249-.282 .500 .275 4639-165-500 RACEX-A6550-Z3CT 4639-196-275
.274-.307 .550 .300 4639-165-550 RACEX-A6555-Z3CT 4639-196-300
.299-.332 .500 .225 4639-165-500 RACEX-A6550-Z3CT 4639-196-225
.324-.357 .550 .250 4639-165-550 RACEX-A6555-Z3CT 4639-196-250
.349-.382 .550 .225 4639-165-550 RACEX-A6555-Z3CT 4639-196-225

4639-665 Flush Head or RACEX® Flush Head Fastener
and 4639-19 S-Spring Receptacle

Total Material Thickness (inches) Stud Grip Spring Height Flush Head Stud Picture   S-Spring Part Number
Flush Head Stud Part Number RACEX® Flush Head Stud Part Number
.099-.132 .500 .425 4639-665-500 RACEX-F6550-Z3CT 4639-196-425
.124-.157 .400 .300 4639-665-400 RACEX-F6540-Z3CT 4639-196-300
.149-.182 .550 .425 4639-665-550 RACEX-F6555-Z3CT 4639-196-425
.174-.207 .400 .250 4639-665-400 RACEX-F6540-Z3CT 4639-196-250
.199-.232 .400 .225 4639-665-400 RACEX-F6540-Z3CT 4639-196-225
.224-.257 .500 .300 4639-665-500 RACEX-F6550-Z3CT 4639-196-300
.249-.282 .500 .275 4639-665-500 RACEX-F6550-Z3CT 4639-196-275
.274-.307 .550 .300 4639-665-550 RACEX-F6555-Z3CT 4639-196-300
.299-.332 .500 .225 4639-665-500 RACEX-F6550-Z3CT 4639-196-225
.324-.357 .550 .250 4639-665-550 RACEX-F6555-Z3CT 4639-196-250
.349-.382 .550 .225 4639-665-550 RACEX-F6555-Z3CT 4639-196-225