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OEM Fastening Systems | Special Components & Fastening Systems
H Series tapered threaded inserts for plastics outperform all competitive inserts for ultrasonic and thermal installation into thermoplastic or structural foam. Our customers confirm it.

We've eliminated the outward stress that occurs with other insert designs during the installation process. Our proprietary "knuckle knurl" ensures a more uniform flow of material into the diagonal knurls and undercuts, ensuring a complete fill, reducing installation time and increasing holding strengths. The tapered insert design makes alignment faster and more accurate, reducing installation time.
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Item #

Thread Size

Thread Type

A (Long)

Tolerance for A (Long)

B (Short)

080 x 115H N/A 0-80 N/A Inch N/A N/A ±0.004 in N/A 0.115 in
080 x 188H N/A 0-80 N/A Inch N/A 0.188 in N/A ±0.004 in N/A
256 x 115H N/A 2-56 N/A Inch N/A N/A ±0.004 in N/A 0.115 in
256 x 188H N/A 2-56 N/A Inch N/A 0.188 in N/A ±0.004 in N/A
440 x 135H N/A 4-40 N/A Inch N/A N/A ±0.004 in N/A 0.135 in
440 x 219H N/A 4-40 N/A Inch N/A 0.219 in N/A ±0.004 in N/A
440 x 285H N/A 4-40 N/A Inch N/A 0.285 in N/A ±0.004 in N/A
540 x 150H N/A 5-40 N/A Inch N/A N/A ±0.004 in N/A 0.15 in
540 x 250H N/A 5-40 N/A Inch N/A 0.25 in N/A ±0.004 in N/A
632 x 150H N/A 6-32 N/A Inch N/A N/A ±0.004 in N/A 0.15 in
632 x 250H N/A 6-32 N/A Inch N/A 0.25 in N/A ±0.004 in N/A
832 x 185H N/A 8-32 N/A Inch N/A N/A ±0.004 in N/A 0.185 in
832 x 312H N/A 8-32 N/A Inch N/A 0.312 in N/A ±0.004 in N/A
832 x 375H N/A 8-32 N/A Inch N/A 0.375 in N/A ±0.004 in N/A
1024 x 150H N/A 10-24 N/A Inch N/A N/A ±0.004 in N/A 0.15 in
1024 x 225H N/A 10-24 N/A Inch N/A N/A ±0.004 in N/A 0.225 in
1024 x 375H N/A 10-24 N/A Inch N/A 0.375 in N/A ±0.004 in N/A
1032 x 150H N/A 10-32 N/A Inch N/A N/A ±0.004 in N/A 0.15 in
1032 x 225H N/A 10-32 N/A Inch N/A N/A ±0.004 in N/A 0.225 in
1032 x 375H N/A 10-32 N/A Inch N/A 0.375 in N/A ±0.004 in N/A
2520 x 300H N/A 1/4-20 N/A Inch N/A N/A ±0.004 in N/A 0.3 in
2520 x 500H N/A 1/4-20 N/A Inch N/A 0.5 in N/A ±0.004 in N/A
2528 x 300H N/A 1/4-28 N/A Inch N/A N/A ±0.004 in N/A 0.3 in
2528 x 500H N/A 1/4-28 N/A Inch N/A 0.5 in N/A ±0.004 in N/A
3118 x 335H N/A 5/16-18 N/A Inch N/A N/A ±0.004 in N/A 0.335 in
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