It enables these screws to easily handle the pre-load applied to them. If you tighten them to their respective torque levels, they will give you with the best fatigue resistance. Socket head cap screws are typically used in applications that demand an aesthetically pleasing fastener with enough tensile strength to handle heavier loads. They're mostly used in railways, wind turbines, nuclear power, the automotive sector, construction, and the electronics industry.
STANDARD SPECIFICATION
- Stainless Steel Screw standard:- ISO 14583
- DIN Standard:-B.S. DIN 933, DIN 931, DIN 934, DIN 912, DIN 603, DIN 6923, DIN 970, DIN 7981, DIN 7982, DIN916, DIN 913, DIN 7985
- UTS – Unified Thread Standard:- UNC, UNF, UNEF, UNS, NPT, NPTF
- Stainless Steel counter sunk screws standard:- ISO 10642
- Grade:-18-8 Stainless Steel, 4.8, 8.8, A2, A4, A2-70; A4-70; A4-80 Socket Head Cap Screws
- British standards:-BS 57
- Length:- 3 mm to 200 mm
- Stainless Steel Threads:-Metric, Metric Fine, BSW, UNF, UNC, BA, BSF and BSCY (cycle) threads or as required
- Stainless Steel Socket Head Cap Screws Size:-Cold Froging : M2-M24, Hot forging M24-M100, 1-1/2” Dia, up to 1100mm lg, Machining and CNC for Customized connecting element: up to M100 / 4” Dia, up to 1500mm lg Stainless Steel Socket Head Cap Screws M2, M3, (M3.5), M4, M5, M6, M8, M10, M12, (M14), M16, (M18), M20, (M22), M24, (M27), M30, M33, M36, M42, (M45), M48 to M160 and Custom Sizes
- Stainless Steel Threads:-METRIC, BSW, BSF, UNC, UNF or as required
- Standard:-ISO 14585C ~DIN 7981C, DIN 7973C ~ISO 1483, DIN 7983C ~ISO 7051, ISO 4762, ISO 2009, ISO 7050, ISO 14587, ISO 14587, ISO 14584, ISO 14582, ANSI B18.3.1M, ASME B18.6.3, GB/T5782, GB/T5783, GB5783 DIN, ISO, JIS, GB, IS, BS, ASTM and all International Standards ANSI – American National Standards Institute
- Dimensions:-ASME B18.6.3 **Exception: screws 6 inches and shorter are fully threaded.
- Tolerance:-+/-0.01mm to +/-0.05mm
- Head drive:Phillips, Slotted, Phillips/Slot, Six-Lobe, etc
- Type:Pan/ Round/ Oval/ countersunk/ Truss head
- Head:Pan head, flat head, oval head, hex head, phillips head
- Finishing:-Zinc (yellow, white, blue, black), black oxide Geometry, Dacroment, anodizing, nickel plated, plated zinc-nickel, Stainless steel: Passivated Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Stainless Steel, Mechanically Applied coating and some special one like DACROMET
- Finish:-Per ASTM A380/A380M
- Production process:-Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing
- Surface Coating::-Ptfe Coated Socket Head Cap Screws , Hot Dipped Galvanizing Socket Head Cap Screws , Phosphate Socket Head Cap Screws , Teflon Socket Head Cap Screws, Xylon Socket Head Cap Screws , Zinc Phosphate Socket Head Cap Screws, Manganese Phosphate, Zinc Electro Plating (Hexavalent or Trivalent Chrome), ZAC (Zinc Alluminium Flake Coating), Cadmium Socket Head Cap Screws All surface finishes can be supplied, including Zinc, Galvanised, Sherardized, Electroless Nickel, Dacromet, Geomet & PTFE.
- Surface treatment:-Polish, Passivation, Anodizing, Sand blasting, Heat-disposing, Hot dip galvanizedHeat-disposing, Rust preventive oil, Black oxide coating, Ruspert coating screws, Electroplating (color, blue, white, black zinc, Ni, Cr, tin, silver)
- Top Manufacturers:-SPAX® Screws, GKW, Unbrako, Kundan, APL, Sundaram Precision, Infasco, EBY Fastener Etc.
- Stainless Steel Socket Head Cap Screws Packing:-IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request
- Why choose us?:-Best Price in India and compare to China, Professional technical team, High precision threads, Strong production line, Micro Metals will be your reliable partner
- Test Certificate:-Manufacturer Test Certificate as per EN 10204 / 3.1, Tensile testing to ISO 898-1, Nut proof load testing to ISO 898-2, Suitability for preloading to EN 14399-2, Suitability test for calibrated preload to EN 14399-10, Charpy Impact testing in accordance with ISO 148-1, Hardness testing to ISO 6508-1, Tri-Roll Thread Comparators, Calibrated gauges and tools
- Other available material:-Stainless Steel Socket Head Cap Screws: SUS201, SUS304, SUS316, SUS410, Brass Socket Head Cap Screws : C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200CuZn37), C28000(CuZn40), Bronze Socket Head Cap Screw: C51000, C52100, C54400 etc, Aluminum Socket Head Cap Screws: Al6061, Al6063 etc, Aluminum Alloy Socket Head Cap Screws: Al6061, Al6063 etc, Titanium and Titanium Alloy Socket Head Cap Screws: TAD, TA1-TA8, TB2, TC1-TC10, Alloy steel : SCM435, C10B21, C10B33
- Uses & application:-Wind tower, Nuclear power, Railway, Automotive industry, Construction, Electronic industry
- Stainless Steel Socket Head Cap Screw :-AISI 302, 304, 304L,316, 316L, 310, 317, 316S31,317L, 321, 347, 410, 420,904L etc.
- Duplex & Super Duplex Steel Socket Head Cap Screw:-ASTM / ASME A815 UNS No. S31803, UNS No. S 32205, UNS No. S 31254, UNS No. S 31550, UNS No. S 32750, and UNS No. S 32760
- Carbon Steel Socket Head Cap Screw:-ASTM A307, A193
- Alloy Steel Socket Head Cap Screw:-ASTM / ASME A/SA 193 / 194 B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M
- Nickel Alloy Socket Head Cap Screw:-ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 UNS 2200 (NICKEL 200) / UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600) / UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 8020 (ALLOY 20 / 20 CB 3)
|
Tolerance on Length |
Nominal Screw Size
|
Nominal Screw Length
|
|||||
|
Up to 1″
|
Over 1″ – 2-1/2″
|
Over 2-1/2″ – 6″
|
Over 4″ – 6″
|
||||
|
0 thru 3/8
|
-.03
|
-.04
|
-.06
|
-.12
|
|||
|
7/16 thru 3/4
|
-.03
|
-.06
|
-.08
|
-.12
|
|||
|
7/8 thru 1-1/2
|
-.05
|
-.10
|
-.14
|
-.20
|
|||
|
Nominal Size |
Tensile Strength (lbs., min) |
Yield Strength (lbs., min) |
Body Section
|
Tightening Torque (in. – lbs.)
|
||||||||||
|
UNRC
|
UNRF
|
UNRC
|
UNRF
|
Single Shear Strength (lbs., min.)
|
UNRC
|
UNRF
|
||||||||
|
Alloy
|
Stainless
|
Alloy
|
Stainless
|
Alloy
|
Stainless
|
Alloy
|
Stainless
|
Alloy
|
Stainless
|
Alloy
|
Stainless
|
Alloy
|
Stainless
|
|
|
0
|
–
|
–
|
320
|
145
|
–
|
–
|
290
|
72
|
305
|
130
|
–
|
–
|
2.6 |
1.4
|
|
1
|
475
|
–
|
500
|
220
|
425
|
–
|
450
|
111
|
450
|
190
|
4.5
|
–
|
4.8
|
2.3
|
|
2
|
665
|
295
|
710
|
–
|
600
|
185
|
635
|
–
|
625
|
260
|
7.5
|
3.8
|
8.0
|
–
|
|
3
|
875
|
–
|
940
|
–
|
790
|
–
|
845
|
–
|
830
|
–
|
11.0
|
–
|
12.0
|
–
|
|
4
|
1,090
|
480
|
1,190
|
–
|
975
|
240
|
1,070
|
–
|
1,060
|
350
|
16.0
|
6.0
|
18.0
|
–
|
|
5
|
1,430
|
–
|
1,490
|
–
|
1,290
|
–
|
1,345
|
–
|
1,325
|
–
|
24.0
|
–
|
24.0
|
–
|
|
6
|
1,640
|
725
|
1,825
|
–
|
1,470
|
363
|
1,645
|
–
|
1,615
|
375
|
30.0
|
15.0
|
34.0
|
–
|
|
8
|
2,520
|
1,120
|
2,650
|
–
|
2,270
|
560
|
2,385
|
–
|
2,280
|
670
|
55.0
|
28.0
|
58.0
|
–
|
|
10
|
3,150
|
1,400
|
3,600
|
1,600
|
2,835
|
701
|
3,240
|
800
|
3,060
|
950
|
79.0
|
40.0
|
90.0
|
46.0
|
|
1/4
|
5,725
|
2,550
|
6,550
|
2,910
|
5,150
|
1,273
|
5,900
|
1,455
|
5,295
|
2,200
|
200.0
|
95.0
|
230.0
|
109.0
|
|
5/16
|
9,430
|
4,200
|
10,440
|
4,645
|
8,490
|
2,100
|
9,395
|
2,230
|
8,285
|
3,450
|
415.0
|
170.0
|
460.0
|
188.0
|
|
3/8
|
13,950
|
6,100
|
15,805
|
7,025
|
12,555
|
3,100
|
14,225
|
3,510
|
11,910
|
4,970
|
740.0
|
301.0
|
845.0
|
341.0
|
|
7/16
|
19,135
|
–
|
21,365
|
–
|
17,220
|
–
|
19,230
|
–
|
16,200
|
–
|
1,190.0
|
–
|
1,305.0
|
–
|
|
1/2
|
25,540
|
11,350
|
28,780
|
–
|
22,990
|
5,675
|
25,905
|
–
|
21,175
|
8,840
|
1,800.0
|
750.0
|
2,065.0
|
–
|
|
5/8
|
38,400
|
–
|
43,500
|
–
|
34,550
|
–
|
39,150
|
–
|
31,300
|
–
|
3,400.0
|
–
|
3,800.0
|
–
|
|
3/4
|
56,750
|
–
|
63,400
|
–
|
51,100
|
–
|
57,050
|
–
|
45,050
|
–
|
6,000.0
|
–
|
6,750.0
|
–
|
|
7/8
|
78,500
|
–
|
86,500
|
–
|
70,700
|
–
|
77,850
|
–
|
61,350
|
–
|
8,250.0
|
–
|
9,200.0
|
–
|
|
1
|
103,000
|
–
|
112,700
|
–
|
92,700
|
–
|
101,450
|
–
|
80,100
|
–
|
12,500.0
|
–
|
13,000.0
|
–
|
|
1-1/4
|
164,700
|
–
|
182,400
|
–
|
148,250
|
–
|
164,150
|
–
|
125,100
|
–
|
25,000.0
|
–
|
27,750.0
|
–
|
|
1-1/2
|
238,800
|
–
|
268,800
|
–
|
215,950
|
–
|
241,900
|
–
|
180,200
|
–
|
43,500.0
|
–
|
49,000.0
|
–
|
LENGTHS |
#2 |
#3 |
#4 |
#5 |
#6 |
#8 |
#10 |
#12 |
1/4″ |
5/16″ |
3/8″ |
1/8 |
0.40 |
0.55 |
0.70 |
1.1 |
1.4 |
||||||
3/16 |
0.50 |
0.70 |
0.90 |
1.2 |
1.5 |
2.5 |
3.9 |
||||
1/4 |
0.60 |
0.80 |
1.00 |
1.4 |
1.7 |
2.8 |
4.3 |
5.6 |
8.5 |
||
5/16 |
0.60 |
0.90 |
1.20 |
1.5 |
1.9 |
3.1 |
4.6 |
6.1 |
9.1 |
16.7 |
|
3/8 |
0.70 |
0.90 |
1.30 |
1.7 |
2.1 |
3.4 |
5.0 |
6.5 |
9.8 |
17.7 |
29.2 |
7/16 |
0.80 |
1.00 |
1.50 |
1.9 |
2.2 |
3.6 |
5.4 |
6.9 |
10.4 |
18.8 |
30.7 |
1/2 |
0.80 |
1.10 |
1.60 |
2.0 |
2.4 |
3.9 |
5.8 |
7.4 |
11.1 |
19.8 |
32.2 |
9/16 |
0.90 |
1.20 |
1.70 |
2.2 |
2.6 |
4.2 |
6.2 |
7.8 |
11.7 |
20.9 |
33.6 |
5/8 |
1.00 |
1.30 |
1.80 |
2.3 |
2.8 |
4.5 |
6.6 |
8.3 |
12.4 |
21.9 |
35.1 |
3/4 |
1.10 |
1.50 |
2.10 |
2.6 |
3.2 |
5.0 |
7.3 |
9.2 |
13.6 |
24.0 |
38.0 |
7/8 |
1.30 |
1.70 |
2.30 |
3.0 |
3.5 |
5.6 |
8.1 |
10.1 |
14.9 |
26.1 |
41.0 |
1″ |
1.40 |
1.90 |
2.50 |
3.4 |
3.9 |
6.2 |
8.9 |
11.0 |
16.1 |
28.8 |
44.0 |
1-1/8″ |
1.50 |
2.00 |
2.80 |
3.8 |
4.3 |
6.7 |
9.6 |
11.9 |
17.4 |
30.2 |
47.0 |
1-1/4″ |
1.60 |
2.20 |
3.00 |
4.1 |
4.6 |
7.3 |
10.4 |
12.8 |
18.7 |
32.3 |
49.8 |
1-1/2″ |
1.80 |
2.50 |
3.50 |
4.7 |
5.3 |
8.3 |
11.9 |
14.7 |
21.2 |
36.5 |
55.8 |
1-3/4″ |
2.10 |
2.90 |
4.00 |
5.3 |
6.1 |
9.4 |
13.5 |
16.5 |
23.7 |
40.7 |
61.7 |
2″ |
2.40 |
3.30 |
4.50 |
6.0 |
6.8 |
10.6 |
15.0 |
18.3 |
26.2 |
44.8 |
67.6 |
2-1/4″ |
2.60 |
3.60 |
5.00 |
6.7 |
7.6 |
11.8 |
16.6 |
20.1 |
28.8 |
19.0 |
73.5 |
2-1/2″ |
2.80 |
3.90 |
5.50 |
7.3 |
8.3 |
12.9 |
18.1 |
22.0 |
31.3 |
53.2 |
79.5 |
2-3/4″ |
3.10 |
4.30 |
6.00 |
7.9 |
9.1 |
13.9 |
19.7 |
23.8 |
33.9 |
57.3 |
85.3 |
3″ |
3.40 |
4.70 |
6.50 |
8.6 |
9.8 |
15.0 |
21.2 |
25.6 |
36.4 |
61.5 |
91.3 |
* Weights above are approximate and are based on pan head machine screws |
|||||||||||
TYPES OF SOCKET HEAD CAP SCREWS
