Cross Recessed Hexagon Bolts Indentation

Supplier Xiaoguo® Cross Recessed Hexagon Bolts Indentation – hex + cross drive, center indentation stops head cracks. Hardened threads tap their own holes. Carbon steel (zinc/Dacromet) or SS304/316. Request a quotation.

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Product Description

Manufacturer Xiaoguo® Cross Recessed Hexagon Bolts Indentation integrate dual hex-cross drives, with central depressions to block head breakage. Hardened threads enable self-tapping. Material options include zinc-plated/Dacromet carbon steel and SS304/316 stainless steel.

The head of the Cross Recessed Hexagon Bolts Indentation adopts a composite structure of "hexagonal head + cross slot + center depression", the shank is self-drilling thread, and the tail is conical or cutting type.

Head structure

1.Hexagonal head: Has an external hexagonal shape with standard width on opposite sides. Can be operated with a hexagonal socket or open-end wrench, suitable for high-vibration environments.

2.Phillips recess – The slot is shaped like a cross, with a cone‑shaped bottom. When you stick a Phillips screwdriver in, it lines up quickly. Works well for pre‑tightening or when you’re working in a tight space.

3.Center indentation – It’s a small round dent right in the middle of the cross groove.

Cross Recessed Hexagon Bolts Indentation

The rod part and the thread

1.Thread type: Full-thread self-tapping screw thread

2.Thread hardness: The surface has undergone carburizing treatment, with hardness ranging from 450 to 650 HV, while the core remains resilient.

3.Tail: The standard shape is a conical tip that can be molded by compression.

Key dimensions

Hexagonal head edge-to-edge width	7.0 - 7.4 mm
Cross-slot model	PH2 (or PH3)
Cavity diameter	Approximately 2.0–2.5 mm, depth 0.3–0.5 mm
Head height	3.0 – 3.4 mm
Thread major diameter	4.15 – 4.30 mm

Cross Recessed Hexagon Bolts Indentation

Mon	ST2.9	ST3.5	ST4.2	ST4.8	ST6.3	ST8
P	1.1	1.3	1.4	1.6	1.8	2.1
a max	1.1	1.3	1.4	1.6	1.8	2.1
da max	3.5	4.1	4.9	5.5	7.1	9.2
s max	5	5.5	7	8	10	13
s min	4.82	5.32	6.78	7.78	9.78	12.73
e min	5.4	5.96	7.59	8.71	10.95	14.26
k max	2.3	2.6	3	3.8	4.7	6
k min	2	2.3	2.6	3.3	4.1	5.2
r min	0.1	0.1	0.2	0.2	0.25	0.4
No.	1	2	2	2	3	3
M	2.5	3.5	4	4.4	6.2	7.2
t min	0.95	0.91	1.4	1.8	2.36	3.2
t max	1.32	1.43	1.9	2.33	2.86	3.86
d max	2.9	3.53	4.22	4.8	6.25	8
d min	2.76	3.35	4.04	4.62	6.03	7.78
d1 max	2.18	2.64	3.1	3.58	4.88	6.2
d1 min	2.08	2.51	2.95	3.43	4.7	5.99

The direct functions brought about by structure

Combinatorial drive → Two tools can be used interchangeably, providing high flexibility on-site.

Cavity → Reduces the risk of head fracture and enhances the torque-bearing capacity

Hardened threads → The threads of the self-tapping Cross Recessed Hexagon Bolts Indentation should not be worn out and they can be disassembled and reassembled up to 3-5 times.

Material Introduction

The selection of the material for Cross Recessed Hexagon Bolts Indentation mainly affects strength, rust prevention ability and cost. Common materials are divided into two categories: carbon steel and stainless steel. Carbon steel must be used in combination with surface treatment.

1.Carbon steel

It is made from high-quality carbon steel materials, with a solid and uniform texture.

It’s got good hardness and toughness, so when you’re driving it in, it won’t easily bend or snap. The threads hold steady, and it works fine for everyday fastening and assembly.

2.Different surface finishes – like zinc plating or black oxide – help block moisture and air, which slows down rust. Good for regular indoor, dry conditions.

3.Stainless steel – this one doesn’t rust. Wet or outdoor conditions won’t hurt it. Even after years of use, it stays in good shape. It is applicable in a wider range of scenarios.

4.Strict control over raw materials

All the raw materials entering the factory have undergone quality screening, with low impurities and uniform performance. The materials of large quantities of goods are of the same standard, ensuring the overall quality of the Cross Recessed Hexagon Bolts Indentation.