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Hex Socket Cap Screws Din912

Product: Hex socket cap screws , socket head cap screws
Standard: din912 iso 4762 ASTM449
Raw material: Q235,10B21 10B33 35K 45K 40CR,etc.
Surface: Plain,zinc plated,black oxide,H.D.G,etc.
Specification Range: M1.6–M30; INCH: 1/4”–1 ”
Property Class:12.9, 10.9, 8.8

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Product Introduction

Core Info

Product Overview

Hex socket cap screws (also called socket head cap screws) are precision fasteners featuring a cylindrical head and an internal hexagonal drive. Compliant with international standards like DIN 912, ISO 4762, and ASTM A449, they offer high torque transmission and a low-profile design. Widely used in machinery, equipment, and precision assemblies, they excel in confined spaces where external hex bolts are impractical.

Key Specifications

Category Details

Raw Materials Carbon steel (Q235, 35K, 45K), alloy steel (40Cr, 42CrMo), stainless steel (304/A2, 316/A4)

Surface Treatments Plain, zinc plating, black oxide, hot-dip galvanizing (H.D.G), Dacromet, phosphating

Specification Range Metric: M1.6–M30; Imperial: 1/4"–1"

Property Classes Carbon steel: 4.8, 8.8; Alloy steel: 10.9, 12.9; Stainless steel: A2-70, A4-70

Core Characteristics

Precision & High Torque: Internal hex drive enables higher tightening torque, reducing slippage and improving connection reliability.

Low-Profile Design: Cylindrical head sits flush or slightly recessed, avoiding protrusions and interference with surrounding components.

Wide Material Adaptability: From general carbon steel to high-strength alloy steel and corrosion-resistant stainless steel, meeting diverse performance needs.

Space-Saving Installation: Compatible with Allen wrenches, ideal for tight or hard-to-reach areas.

Application Fields

Machinery & Equipment:

Motors, gearboxes, pumps, valves, and precision tooling.

Automotive & Aerospace:

Engine components, chassis parts, and aircraft accessories.

Electronics & Instruments:

Circuit boards, precision instruments, and electronic enclosures.

Industrial Assemblies:

Molds, fixtures, and mechanical structures requiring high precision.

Usage Precautions

Installation:

Use a matching Allen wrench to avoid stripping the internal hex; tighten to specified torque (high-strength grades require controlled preload).

Environment:

Choose stainless steel (316/A4) or Dacromet coating for humid/corrosive environments; alloy steel grades suit high-load scenarios.

Maintenance:

Regularly inspect for loosening or corrosion; replace if threads are damaged or heads show wear.

Taboos:

Do not use mismatched tools (e.g., worn wrenches); avoid over-tightening to prevent thread damage or component deformation.

Sales & Logistics

Markets: North America, Europe, Asia-Pacific, and global industrial hubs.

Packaging: Small bags, cartons, pallets; customized packaging available.

Order Flexibility: Supports bulk and small-batch orders; delivery terms negotiable.

Quality Assurance

Certified to ISO9001:2015; all products undergo dimensional and mechanical performance testing.

Provides long-term quality guarantees and technical after-sales support.

FAQ:Hexagon Socket Head Cap Screws: Uses & Core Differences from Hexagon Head Bolts

Main Uses

Hexagon socket head cap screws are a staple for precision machinery, mold-making, and compact equipment assembly. Their recessed drive design enables secure fastening in tight, limited-clearance spaces where external bolt heads cannot fit.

Core Differences vs. Hexagon Head Bolts

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1. Drive Tool

Requires an Allen key (hex key) for installation, while hexagon head bolts use a standard wrench/socket wrench.

2. Space Suitability

Ideal for confined areas; hexagon head bolts need more operating clearance for external tool access.

3. Application Focus

Used for precision, low-profile fastening; hexagon head bolts are preferred for heavy-duty structural, construction, and industrial applications requiring high torque and easy accessibility.

Established in 2005, our company has evolved over two decades of continuous development into a leading regional enterprise in the fastener industry with fully automated end-to-end production. With an annual output value exceeding RMB 130 million, our product range covers diverse market segments from mid-range to high-end and is distributed worldwide

Our factory & quipment

Mechanical Properties (Typical Grades)

Characteristic	Carbon Steel 8.8	Alloy Steel 12.9	Stainless Steel A2-70
Min. Tensile Strength	≥800 MPa	≥1200 MPa	≥700 MPa
Min. Yield Strength	≥640 MPa	≥1080 MPa	≥450 MPa
Hardness Range	235–302 HB	363–444 HB	-

product-760-384

螺纹尺寸 d			M1.4	M1.6	M2	M2.5	M3	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20
P	螺距	粗牙	0.3	0.35	0.4	0.45	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5
		细牙1	-			-		-		-	1	1.25	1.25	1.5	1.5	1.5	1.5
		细牙2		-		-			-		-	1	1.5			2	2
dk	圆头	最大值	2.6	3	3.8	4.5	5.5	7	8.5	10	13	16	18	21	24	27	30
	滚花头	最大值	2.74	3.14	3.98	4.68	5.68	7.22	8.72	10.22	13.27	16.27	18.27	21.33	24.33	27.33	30.33
	最小值		2.46	2.86	3.62	4.32	5.32	6.78	8.28	9.78	12.73	15.73	17.73	20.67	23.67	26.67	29.67
da	最大值		1.8	2	2.6	3.1	3.6	4.7	5.7	6.8	9.2	11.2	13.7	15.7	17.7	20.2	22.4
ds	最大值		1.4	1.6	2	2.5	3	4	5	6	8	10	12	14	16	18	20
ds	最小值		1.26	1.46	1.86	2.36	2.86	3.82	4.82	5.82	7.78	9.78	11.73	13.73	15.73	17.73	19.67
e	最小值		1.5	1.73	1.73	2.3	2.87	3.44	4.58	5.72	6.86	9.15	11.43	13.72	16	16	19.44
k	最大值		1.4	1.6	2	2.5	3	4	5	6	8	10	12	14	16	18	20
k	最小值		1.26	1.46	1.86	2.36	2.86	3.82	4.82	5.7	7.64	9.64	11.57	13.57	15.57	17.57	19.48
S	公称		1.3	1.5	1.5	2	2.5	3	4	5	6	8	10	12	14	14	17
	最小值		1.32	1.52	1.52	2.02	2.52	3.02	4.02	5.02	6.02	8.025	10.025	12.032	14.032	14.032	17.05
	最大值		1.36	1.56	1.56	2.06	2.58	3.08	4.095	5.14	6.14	8.175	10.175	12.212	14.212	14.212	17.23
t	最小值		0.6	0.7	1	1.1	1.3	2	2.5	3	4	5	6	7	8	9	10
W	最小值		0.5	0.55	0.55	0.85	1.15	1.4	1.9	2.3	3	4	4.8	5.8	6.8	7.8	8.6
千件钢制重≈kg					-				-		-
螺纹长度b					-	-	-	-	-								-