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).

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	A ±.004	L ±.004	Hole H +.003 -.000	Min. Boss
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	M5.0 x 0.8	M50 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	M6.0 x 1.0	M60 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	M8.0 x 1.25	M80 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	A ±.004	B ±.004	L ±.004	Hole H +.003 -.000	Min. Boss
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
10-24	H1024 x 328P	M5.0 x 0.8	HM50 x 328P	.313	.040	.328	.244	.488
10-32	H1032 x 207P			.313	.043	.207	.244	.488
10-32	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	M6.0 x 1.0	HM60 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	M8.0 x 1.25	HM80 x 364P†	.433	.050	.364	.368	.736

† Non-Stocking Item – Minimum Order May Apply

Tri-Star Industries, Inc.
101 Massirio Dr., Berlin, CT 06037 :: Tel 860-828-7570 :: Fax 860-828-7475 :: sales@tristar-inserts.com