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Minimum engagement length of the full thread is generally 2.5 times the basic screw diameter.

Recommended engagement length does not include lead threads (2 pitch ref.)

Typical hole engagement, 65-70%.

For shorter lengths, contact the Engineering Services department for assistance.

SEMBLEX CORPORATION MAG-FORM® HOLE SIZE DATA
Screw Size(1)	Cored Hole						Drilled Hole
	Hole Diameter				Boss Diameter	Core Hole Depth	Diameter	Distance to Edge₍₂₎	Through Hole Depth
	A		B		C	D	X	Y	Z
	Max.	Min.	Max.	Min.	Min.	Min.	Nominal	Min.	Min.
	mm in	mm in	mm in	mm in	mm in	mm in	mm in	mm in	mm in
MG3-1.0	2.85	2.77	2.72	2.64	6.75	10.50	2.75	2.00	7.50
	0.112	0.109	0.107	0.104	0.266	0.413	0.108	0.079	0.295
MG3.5-1.2	3.28	3.20	3.13	3.05	7.83	12.35	3.17	2.33	8.75
	0.129	0.126	0.123	0.120	0.308	0.486	0.125	0.092	0.344
MG4-1.4	3.70	3.62	3.52	3.44	8.90	14.20	3.57	2.67	10.00
	0.146	0.143	0.139	0.135	0.350	0.559	0.141	0.105	0.394
MG4.5-1.5	4.13	4.05	3.94	3.86	10.00	15.75	4.00	3.00	11.25
	0.163	0.159	0.155	0.152	0.394	0.620	0.157	0.118	0.443
MG5-1.6	4.58	4.50	4.36	4.28	11.10	17.30	4.43	3.33	12.50
	0.180	0.177	0.172	0.169	0.437	0.681	0.174	0.131	0.492
MG6-2.0	5.46	5.38	5.20	5.12	13.29	21.00	5.29	4.00	15.00
	0.215	0.212	0.205	0.202	0.523	0.827	0.208	0.157	0.591
MG7-2.0	6.49	6.41	6.18	6.10	15.63	23.50	6.29	4.67	17.50
	0.256	0.252	0.243	0.240	0.615	0.925	0.248	0.184	0.689
MG8-2.5	7.33	7.25	6.98	6.90	17.78	27.50	7.12	5.33	20.00
	0.289	0.285	0.275	0.272	0.700	1.083	0.280	0.210	0.787
MG10-3.0	9.20	9.12	8.76	8.68	22.27	34.00	8.94	6.67	25.00
	0.362	0.359	0.345	0.342	0.877	1.339	0.352	0.263	0.984
MG12-3.5	11.06	10.98	10.54	10.46	26.76	40.50	10.76	8.00	30.00
	0.435	0.432	0.415	0.412	1.054	1.594	0.424	0.315	1.181

Footnotes:
1. Additional sizes available upon request.
2. Minimum distance to edge without measurable distortion.

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Semblex®, Rolok®, Polyfast®, Plastilok® Plasto-Driv® TriForm®, CaptiForm® and Semblex Square Dome® are registered trademarks of Semblex Corporation. Tapmate™ is a trademark of Semblex Corporation. Torx Plus®, Autosert®, Torx®, Mag-Form®, Strux® are registered trademarks of Acument Intellectual Properties, LLC. CTP™, is a trademark of Acument Intellectual Properties, LLC. PT®, ALtracs®, Delta PT®, Duro-PT® and PT® Type DG® are registered trademarks of EJOT Verbindungstechnik GmbH & Co. KG. Quadrex® and Quadrex® Plus are registered trademarks of Quadrex Consulting, Inc. ACR® Phillips II®, Phillips Square Driv®, Pozidriv®, ACR® Tri-Wing®, and Mortorq®, are registered trademarks of Phillips Screw Co. MAThread® and MATPoint® are a registered trademark of MAThread Inc. Square Cone® is a registered trademark of ITW. Crest Cup ™ is a trademark of Crest Products.