ISO 7380 Button Head Hex Socket Screw

Wanluo's China ISO 7380 Button Head Hex Socket Screw are manufactured in full compliance with ISO international precision standards, designed for surface assembly, anti-scratch and aesthetic-focused fastening scenarios. Unlike DIN 912 cylindrical cup head screws with sharp vertical edges, the ISO 7380 series features a smooth rounded button head profile with no sharp corners.

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Product Description

This unique curved surface structure eliminates protruding hard edges and scratching risks, while maintaining the advantages of internal hex drive for tool-free narrow-space operation. It perfectly balances safe contact, neat appearance and stable locking performance, becoming the preferred fastener for exposed equipment surfaces, consumer products and aesthetic mechanical assembly.

Load-Bearing Structure Design & Metal Forming Manufacturing Tech

Wanluo ISO 7380 Button Head Hex Socket Screw adopt integrated high-precision cold forging and secondary thread rolling molding. The round head is smoothly polished with uniform radian and no burrs, ensuring a flush and sleek surface after installation. The deepened standard inner hex socket provides precise tool fitting, effectively preventing tool slipping and socket collapse during high-torque tightening. The complete and dense thread profile delivers accurate tolerance and smooth screwing, ensuring consistent locking preload. Made of high-quality stainless steel raw materials, the screw body features excellent tensile strength, structural toughness and corrosion resistance, adapting to repeated disassembly, daily friction and long-term outdoor environmental use without deformation or rust.

Product Parameter

Parameter Item	Detailed Specification
Product Name	ISO 7380 Button Head Hex Socket Screw, Round Head Allen Screw
Executive Standard	ISO 7380, GB Standard, Custom Non-standard Sizes & Thread Pitch
Available Material	304, 316, 316L Stainless Steel; 2205/2507 Duplex Steel Optional
Size Range	M2-M16 full standard metric sizes, custom short/long length available
Head Type	Smooth rounded button head, arc-shaped no sharp corner design
Drive Type	Standard internal hex socket, compatible with universal allen keys
Surface Treatment	Pickling & passivation, mirror smooth finish, burr-free and anti-corrosive
Mechanical Properties	High tensile strength, tough structure, anti-friction and anti-loosening
Packaging Method	Dustproof inner bag + export carton, pallet packing for bulk shipment
Supply Service	Spot inventory, non-standard customization, mixed fastener one-stop supply

Thread Size d		M3	M4	M5	M6	M8	M10	M12	M16
P	Pitch	0.5	0.7	0.8	1	1.25	1.5	1.75	2
a	max	1	1.4	1.6	2	2.5	3	3.5	4
a	min	0.5	0.7	0.8	1	1.25	1.5	1.75	2
d_a	max	3.6	4.7	5.7	6.8	9.2	11.2	14.2	18.2
d_k	max	5.7	7.60	9.50	10.50	14.00	17.50	21.00	28.00
d_k	min	5.4	7.24	9.14	10.07	13.57	17.07	20.48	27.48
e^①	min	2.303	2.873	3.443	4.583	5.723	6.863	9.149	11.429
k	max	1.65	2.20	2.75	3.3	4.4	5.5	6.60	8.80
k	min	1.40	1.95	2.50	3.0	4.1	5.2	6.24	8.44
r	min	0.1	0.2	0.2	0.25	0.4	0.4	0.6	0.6
s^③	Nominal Size	2	2.5	3	4	5	6	8	10
	max	2.080	2.58	3.080	4.095	5.140	6.140	8.175	10.175
	min	2.020	2.52	3.020	4.020	5.020	6.020	8.025	10.025
t	min	1.04	1.3	1.56	2.08	2.6	3.12	4.16	5.2
w	min	0.2	0.3	0.35	0.74	1.05	1.45	1.63	2.25
Minimum tensile load(N)^②	8.8	3220	5620	9080	12900	23400	37100	53900	100000
	10.9	4180	7300	11800	16700	30500	48200	70200	130000
	12.9	4910	8506	13800	19600	35700	56600	82400	154000

Product Reliability Merits & Field Installation Application

1. Rounded button head design removes sharp edges, effectively preventing scratch injuries and surface abrasion during equipment operation and manual contact, ideal for exposed assembly positions.

2. Low-profile arc head occupies less external space than standard cup head screws, ensuring smooth and neat equipment surface without blocking moving parts, improving overall product aesthetics and streamline design.

3. Adopts mature cold forging and thread rolling technology with high structural density. The inner hex socket is not easy to slip under torque, maintaining stable fastening performance after long-term vibration and repeated disassembly.

4. Premium stainless steel material delivers excellent rust and salt spray resistance, suitable for electronic equipment, daily appliances, outdoor facilities and marine mildly corrosive environments.

5. Highly versatile standard thread size, perfectly matched with our full range of nuts, washers and threaded rods, supporting one-stop supporting procurement for industrial assembly lines.

FAQ

Q1: What is the difference between ISO 7380 and DIN 912 socket screws?

A1: DIN 912 is a straight cup head with vertical edges, mostly used for mold and hidden installation. ISO 7380 is a rounded button head with no sharp corners, more suitable for exposed surfaces requiring safety and appearance, with better anti-scratch performance.

Q2: Are button head screws lower in strength than cup head screws?

A2: No. Both adopt identical cold forging process and stainless steel material. The difference is only head shape. The tensile strength and locking stability fully meet standard industrial fastening requirements.

Q3: Can ISO 7380 screws be used for surface decoration assembly?

A3: Absolutely. The smooth arc head and uniform metallic texture provide neat and delicate installation effect, widely used for appearance parts of electronic products, fitness equipment and smart devices.

Q4: Do you provide fine thread and extra-long customized button head screws?

A4: Yes. We support custom head height, screw length, thread pitch and special surface treatment to meet non-standard equipment and personalized assembly needs.

Q5: What are the main application scenarios for ISO 7380 screws?

A5: They are widely applied in electronic equipment, household appliances, automation casings, fitness equipment, medical devices and all exposed positions requiring safe and beautiful fastening.

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