Stainless Steel DIN 913 Flat End Set Screw

Wanluo’s China Stainless Steel DIN 913 Flat End Set Screw are manufactured strictly in accordance with German industrial standards, belonging to high-precision headless hex socket fasteners. Different from all conventional exposed head screws, this set screw features a fully headless design with flat end face and internal hex drive, dedicated to hidden positioning, anti-loosening locking and fixed limit assembly.

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Product Description

Steel DIN 913 Flat End Set Screw by Wanluo supplier can be completely screwed into the threaded hole without protruding parts, thoroughly solving the problems of structural interference, component collision and position offset caused by exposed screw heads. The flat end provides uniform surface pressure, realizing precise positioning without damaging the contact workpiece surface, making it an essential precision fastener for mechanical transmission parts, shaft fixing and mold fine-tuning.

Key Structural Attributes & Industrial Grade Manufacturing Workflow

DIN 913 Flat End Set Screw adopt integrated high-precision cold forging and thread rolling process with full-size standard tolerance control. The integral headless structure ensures zero protrusion after full screwing, realizing completely hidden installation. The standard internal hex socket is deeply formed with smooth inner wall, matching precision allen tools perfectly, supporting high-torque locking and fine adjustment without tool slipping or socket deformation. The flat cutting end face is precisely polished with flat and burr-free surface, which can fit the workpiece contact plane tightly, evenly dispersing fastening pressure and avoiding local indentation or surface damage. The full-section uniform thread features accurate tooth pitch and smooth screwing performance, enabling flexible tightening and loosening for repeated positioning adjustment. Made of high-quality stainless steel and high-strength alloy steel, the screw body has high hardness, strong pressure resistance and excellent corrosion resistance, maintaining stable positioning accuracy under long-term vibration and alternating load conditions.

Product Parameter

Parameter Item	Detailed Specification
Product Name	DIN 913 Flat End Set Screw, Headless Hex Socket Grub Screw
Executive Standard	DIN 913, ISO 4026, GB Standard, Custom Non-standard Sizes
Available Material	304, 316L Stainless Steel, 12.9 Grade Alloy Steel, Carbon Steel
Size Range	M2-M16 full standard metric sizes, custom ultra-short/ultra-long length
Structure Type	Headless design, flat end face, internal hex socket drive
Drive Type	Standard internal hex socket, compatible with precision allen keys
Thread Feature	Full uniform metric thread, high tolerance precision, smooth screwing
Surface Treatment	Pickling & passivation / Black oxide / Zinc-plated, burr-free finish
Mechanical Properties	High hardness, strong pressure resistance, precise positioning, anti-vibration loosening
Packaging Method	Moisture-proof inner bag + export carton, pallet packing for bulk shipment
Supply Service	Spot bulk supply, non-standard customization, one-stop fastener sourcing

Stainless Steel Din 913 Flat End Set Screw

Screw Thread d			M1.4	M1.6	(M1.8)	M2	M2.5	M3	M4	M5	M6
P	Pitch		0.3	0.35	0.35	0.4	0.45	0.5	0.7	0.8	1
d_p	max		0.7	0.8	0.9	1	1.5	2	2.5	3.5	4
d_p	min		0.45	0.55	0.65	0.75	1.25	1.75	2.25	3.2	3.7
e	min		0.803	0.803	0.803	1.003	1.427	1.73	2.3	2.87	3.44
s	Nominal Size		0.7	0.7	0.7	0.9	1.3	1.5	2	2.5	3
	max		0.724	0.724	0.724	0.902	1.295	1.545	2.045	2.56	3.08
	min		0.711	0.711	0.711	0.889	1.27	1.52	2.02	2.52	3.02
t	min	short	0.6	0.7	0.8	0.8	1.2	1.2	1.5	2	2
t	min	long	1.4	1.5	1.6	1.7	2	2	2.5	3	3.5
L₀^①	Nominal Size		2	2.5	2.5	3	3	4	5	6	6

Screw Thread d			M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24
P	Pitch		1.25	1.5	1.75	2	2	2.5	2.5	2.5	3
d_p	max		5.5	7	8.5	10	12	13	15	17	18
d_p	min		5.2	6.64	8.14	9.64	11.57	12.57	14.57	16.57	17.57
e	min		4.58	5.72	6.86	6.86	9.15	11.43	11.43	13.72	13.72
s	Nominal Size		4	5	6	6	8	10	10	12	12
	max		4.095	5.095	6.095	6.095	8.115	10.115	10.115	12.142	12.142
	min		4.02	5.02	6.02	6.02	8.025	10.025	10.025	12.032	12.032
t	min	short	3	4	4.8	5.6	6.4	7.2	8	9	10
t	min	long	5	6	8	9	10	11	12	13.5	15
L₀^①	Nominal Size		6	8	12	14	16	16	16	18	20

Procurement Advantage Analysis & Typical Deployment Environments

1. Headless hidden installation structure achieves zero protrusion after assembly, completely avoiding structural interference and part friction, suitable for mechanical moving parts and compact confined space assembly scenarios.

2. Precision flat end face design forms uniform surface contact with the workpiece, realizing accurate positioning and limit fixing without crushing or scratching the contact surface, protecting the integrity of precision parts.

3. Standard internal hex drive supports precise fine-tuning and high-torque locking, enabling flexible position adjustment and firm fixation, effectively solving position offset and loosening problems caused by equipment long-term operation vibration.

4. High-precision thread rolling process ensures tight thread matching and smooth telescopic adjustment, suitable for repeated disassembly, debugging and maintenance of precision equipment, with stable and durable fastening performance.

5. Multiple material and grade options meet diverse working demands. High-strength alloy steel is for heavy-load positioning, while stainless steel is for anti-corrosion and outdoor environments, covering mold, automation and instrumentation industries.

Stainless Steel Din 913 Flat End Set Screw

FAQ

Q1: What is DIN 913 Flat End Set Screw mainly used for?

A1: DIN 913 is a headless flat end grub screw, mainly used for precise positioning, anti-loosening locking and limit fixing of shafts, molds and mechanical parts. It is widely applied in scenarios requiring hidden installation and no damage to contact surface.

Q2: What is the difference between DIN 913 and other set screws?

A2: DIN 913 features flat end for surface fitting and non-damage positioning; compared with cone end or cup end set screws, it will not leave indentations on the workpiece, more suitable for precision parts and smooth surface fixing.

Q3: Will headless set screws loose easily?

A3: No. With high-precision full thread and high-torque hex locking structure, it fits the threaded hole tightly. Equipped with thread glue or auxiliary locking measures, it can maintain excellent anti-loosening performance in long-term vibration environments.

Q4: Can DIN 913 screws be used for fine position adjustment?

A4: Yes. The uniform standard thread enables micro-distance telescopic adjustment, which is very suitable for fine debugging of mold gaps, equipment horizontal position and mechanical assembly accuracy.

Q5: Do you provide high-strength grade set screws?

A5: Sure. We supply conventional stainless steel versions and 12.9 grade high-strength alloy steel versions, which can meet heavy-load positioning and high-precision equipment assembly requirements.

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