Hexagon Head Screws with Captive Washer

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Hexagon Head Screws with Captive Washer

Strength 10.9 12.9 Clause Existing
Strength Quality BORON steel SCM435 Type A2
Hardness 32 ~ 39 39 ~ 44 Strength Quality STS304
Note Nickel plating
Black oxide 		Nickel plating
Electroless Nickel plating
Black oxide
와셔조립육각소켓렌치볼트

Standard

제품규격및성징  
the title of screw(d) the pitch of a screw(P) s spring washer plain washer
(internal diameter X external diameter X thickness) 		a(Max)
Title
(Reference Dimensions)		 Min Max S+P/W S/W P/W
M3 0.5 2.5 2.52 2.58 ∮2.7 2.8 X 6 X 0.6 3.0 2.4 1.5
M4 0.7 3 3.02 3.08 ∮3.6 3.7 X 8 X 0.8 4.4 3.5 2.3
M5 0.8 4 4.02 4.095 ∮4.6 4.6 X 10 X 10 5.4 4.3 2.7
M6 1 5 5.02 5.14 ∮5.5 5.6 X 12.5 X 1.6 6.9 5.1 3.7
M8 1.25 6 6.02 6.14 ∮7.4 7.4 X 17 X 1.6 8.4 6.7 4.2
M10 1.5 8 8.025 8.175 ∮9.4 9.5 X 21 X 2.0 10.4 8.2 5.2

Mechanical & Physical Property

Clause
Num		 Mechanical and physical properties Strength classification
3.6 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9
d≤16mm d>16mm
5.1 Tensile strength
Rm, nom N/mm² 		300 400 500 600 800 800 900 1000 1200
5.2 Minimum tensile strength
Rm, min N/mm²(kgf/mm²) 		330 400 420 500 520 600 800
(81.6) 		830
(84.6) 		900 1040
(106) 		1220
(124)
5.3 Vickers Scale(Hv) Min 95 120 130 155 160 190 250 255 290 320 385
F≥30 D² Max 220 250 320 335 360 380 435
5.4 Brinell hardness(HB) Min 90 114 124 147 152 181 238 242 276 304 366
F=30 D² Max 209 238 304 318 342 361 414
5.5 Rockwell scale(HRC) Min - - - - - - 22 23 28 32 39
Max - - - - - - 32 34 37 39 44
5.6 Surface hardness HV 0.3 Max - 320 356 380 402 454
5.7 down yield stress title 180 240 320 300 400 480 - - - - -
ReL N/mm² Min 190 240 340 300 420 480 - - - - -
5.8 0.2% proof stress title - 640 640 720 900 1080
Rp0.2 N/mm² Min - 640 660 720 940 1100
5.9 Proof load stress Sp Sp/ReL or
Sp/Rp0.2
N/mm² 		0.94 0.94 0.91 0.93 0.90 0.92 0.91 0.91 0.90 0.88 0.88
180 225 310 280 380 440 580 600 650 830 970
5.10 Breaking torque MB Nm Min - 59.2 61.2 66.3 84.5 98.9
5.11 Fracture Elongation A Min - - - - - - 12 12 10 9 8
5.12 Breaking torque Z % Min - 52 48 48 44
5.13 Wedge tensile test The value of the full-size bolts and screws (not studs) must be greater than or equal to the minimum value for the longest strength (see 5.2).
5.14 impulse strength KU J Min - 25 - 30 30 25 20 15
5.15 Head impact strength It must not be destroyed.
5.16 Minimum height of non-carburized screws, E - ½H1 ⅔H1 ¾H1
Maximum height of completely decarburized area, G mm - 0.015
5.17 Hardness after tempering - The value of the Vickers hardness should not decrease by more than 20.
5.18 urface flaw Satisfy ISO 6157-1 (KSB 0547) or ISO 6157-3 (KSB 0549)

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