UNI 5931 NF E 25-125 AS 1420 Class8.8 10.9 12.9 Hexagon Socket Head Cap Screws Full Thread Knurl Screws

1. • 

   • Thread Size d				M1.4	M1.6	M2	M2.5	M3	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20
     P		Pitch	Coarse thread	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
     			Fine thread pitch-1	-	-	-	-	-	-	-	-	1	1.25	1.25	1.5	1.5	1.5	1.5
     			Fine thread pitch-2	-	-	-	-	-	-	-	-	-	1	1.5	-	-	2	2
     dk		plain head	max	2.6	3	3.8	4.5	5.5	7	8.5	10	13	16	18	21	24	27	30
     		knurled heads	max	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
     		min		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		max		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		max		1.4	1.6	2	2.5	3	4	5	6	8	10	12	14	16	18	20
     		min		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		min		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		max		1.4	1.6	2	2.5	3	4	5	6	8	10	12	14	16	18	20
     		min		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		Nominal Size		1.3	1.5	1.5	2	2.5	3	4	5	6	8	10	12	14	14	17
     		min		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
     		max		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		min		0.6	0.7	1	1.1	1.3	2	2.5	3	4	5	6	7	8	9	10
     w		min		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
     Weight of per 1000 steel products(≈kg)				-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
     Length of Thread b				-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

   • Thread Size d				(M22)	M24	(M27)	M30	(M33)	M36	M42	M48	M56	M64	M72	M80	M90	M100
     P		Pitch	Coarse thread	2.5	3	3	3.5	3.5	4	4.5	5	5.5	6	6	6	6	6
     			Fine thread pitch-1	1.5	2	2	2	2	3	3	3	4	4	4	4	4	4
     			Fine thread pitch-2	2	-	-	-	-	-	-	-	-	-	-	-	-	-
     dk		plain head	max	33	36	40	45	50	54	63	72	84	96	108	120	135	150
     		knurled heads	max	33.39	36.39	40.39	45.39	50.39	54.46	63.46	72.46	84.54	96.54	108.54	120.54	135.63	150.63
     		min		32.61	35.61	39.61	44.61	49.61	53.54	62.54	71.54	83.46	95.46	107.46	119.46	134.37	149.37
     da		max		24.4	26.4	30.4	33.4	36.4	39.4	45.5	52.6	63	71	79	87	97	107
     ds		max		22	24	27	30	33	36	42	48	56	64	72	80	90	100
     		min		21.67	23.67	26.67	29.67	32.61	35.61	41.61	47.61	55.54	63.54	71.54	79.54	89.46	99.46
     e		min		19.44	21.73	21.73	25.15	27.43	30.85	36.57	41.13	46.83	52.53	62.81	74.21	85.61	97.04
     k		max		22	24	27	30	33	36	42	48	56	64	72	80	90	100
     		min		21.48	23.48	26.48	29.48	32.38	35.38	41.38	47.38	55.26	63.26	71.26	79.26	89.13	99.13
     s		Nominal Size		17	19	19	22	24	27	32	36	41	46	55	65	75	85
     		min		17.05	19.065	19.065	22.065	24.065	27.065	32.08	36.08	41.08	46.08	55.1	65.1	75.1	85.12
     		max		17.23	19.275	19.275	22.275	24.275	27.275	32.33	36.33	41.33	46.33	55.4	65.4	75.4	85.47
     t		min		11	12	13.5	15.5	18	19	24	28	34	38	43	48	54	60
     w		min		9.4	10.4	11.9	13.1	13.5	15.3	16.3	17.5	19	22	25	27	32	34
     Weight of per 1000 steel products(≈kg)				-	-	-	-	-	-	-	-	-	-	-	-	-	-
     Length of Thread b				-	-	-	-	-	-	-	-	-	-	-	-	-	-

Features:

1. Standards and Specifications:
   • The hexagon socket head cap screws follow the standard design of DIN912 and comply with international standards. Their diameters range from M1.4 to M36, with the pitch varying according to the diameter to ensure optimal fastening performance. The lengths vary accordingly to accommodate different installation depths.
2. Diverse Material Options:
   • To meet different hardness requirements, a variety of materials are used for manufacturing, such as carbon steel, alloy steel, stainless steel, etc. Corresponding to different working environments and corrosion resistance requirements, there are also various surface treatments, such as black oxide coating, zinc plating, Dacromet, etc.
3. Design Aspects:
   • The screw head employs a standard hexagon socket design, facilitating installation and removal with a standard hex key of corresponding size. The head is typically cylindrical, offering excellent embeddability and fastening properties.

Advantages:

1. Ease of Use:
   • The hexagon socket design allows easy manipulation of the screw even in confined spaces.
   • Quick installation and removal using a hex key.
2. Strong Fastening:
   • A variety of diameters and pitches ensure robust fastening strength and stability.
   • The cylindrical head design better conforms to the mating surface, improving the fastening effect.
3. Corrosion Resistance:
   • Made from high-quality materials like stainless steel, ensuring excellent corrosion resistance.
   • Multiple surface treatment options further enhance the screw's durability.
4. Wide Applicability:
   • The range of specifications and material choices make this screw suitable for various applications.

Applications:

1. Machinery Industry:
   • Widely used in the assembly and fastening of various machinery and equipment.
   • Ideal for high-strength fastening and precise connections.
2. Automobile Manufacturing and Repair:
   • Used in fastening various components in automobile manufacturing.
   • Useful in replacing damaged screws or performing other fastening operations in vehicle maintenance.
3. Construction and Building:
   • Utilized in the connection and fastening of building structures.
   • Suitable for situations requiring the screw to bear heavy loads.
4. Electronic Equipment and Instruments:
   • Employed in the fastening of small components in the manufacture of electronic equipment and instruments.
   • Appropriate for situations demanding high precision.