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Tri-Star Industries, Inc. P & HP Series Press-In Inserts

P & HP Series: Press-in Threaded Inserts for Hard Plastics

P & HP Series press-in threaded inserts for plastics provide adequate holding strengths without the use of ultrasonic or heat equipment. These straight-hole threaded inserts are most commonly used in thermoset or other hard plastics. The pilot end provides for fast alignment. The insert is placed in a hole, pressure is applied and the three bands of helical knurls dig down deep and lock the insert in place, providing excellent torque-out resistance.

Recommended Hole Size – See chart below for installation hole size. Additional information can be found in our Design Guidelines.

Click here to download the catalog page for Tri-Star's press-in threaded inserts for hard plastics (100k PDF).

Press-In Threaded Inserts for Hard Plastics

press-in brass inserts
P SERIES PRESS-IN THREADED INSERTS
INCH   METRIC   A
±.004
L
±.004
Hole H
+.003 -.000
Min.
Boss
Thread
Size
Part
Number
Thread
Size
Part
Number
2-56 256 x 157P M2.0 x 0.4 M20 x 157P† .134 .157 .121 .242
4-40 440 x 208P M3.0 x 0.5 M30 x 208P .165 .208 .150 .300
6-32 632 x 247P M3.5 x 0.6 M35 x 247P† .197 .247 .182 .364
8-32 832 x 292P M4.0 x 0.7 M40 x 292P .228 .292 .213 .426
10-24 1024 x 328P M5.0 x 0.8 M50 x 328P† .259 .328 .244 .488
10-32 1032 x 328P .259 .328 .244 .488
1/4-20 2520 x 364P M6.0 x 1.0 M60 x 364P .322 .364 .307 .614
1/4-28 2528 x 364P .322 .364 .307 .614
5/16-18 3118 x 364P M8.0 x 1.25 M80 x 364P .383 .364 .368 .736
5/16-24 3124 x 364P .383 .364 .368 .736

† Non-Stocking Item – Minimum Order May Apply

HP SERIES PRESS-IN THREADED INSERTS
INCH   METRIC   A
±.004
B
±.004
L
±.004
Hole H
+.003 -.000
Min.
Boss
Thread
Size
Part
Number
Thread
Size
Part
Number
2-56 H256 x 157P M2.0 x 0.4 HM20 x 157P .189 .024 .157 .121 .242
4-40 H440 x 208P M3.0 x 0.5 HM30 x 208P .220 .024 .208 .150 .300
6-32 H632 x 247P M3.5 x 0.6 HM35 x 247P .250 .029 .247 .182 .364
8-32 H832 x 292P M4.0 x 0.7 HM40 x 292P .283 .032 .292 .213 .426
10-24 H1024 x 207P M5.0 x 0.8 HM50 x 207P .313 .043 .207 .244 .488
H1024 x 328P HM50 x 328P† .313 .040 .328 .244 .488
10-32 H1032 x 207P     .313 .043 .207 .244 .488
H1032 x 328P .313 .040 .328 .244 .488
1/4-20 H2520 x 364P M6.0 x 1.0 HM60 x 364P .374 .050 .364 .307 .614
1/4-28 H2528 x 364P .374 .050 .364 .307 .614
5/16-18 H3118 x 364P M8.0 x 1.25 HM80 x 364P† .433 .050 .364 .368 .736
5/16-24 H3124 x 364P .433 .050 .364 .368 .736

† Non-Stocking Item – Minimum Order May Apply

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101 Massirio Dr., Berlin, CT 06037 :: Tel 860-828-7570 :: Fax 860-828-7475 ::
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