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ASTM A453 GR.660 Class A/B/C/D Fasteners Manufacturer & Exporter

ASTM A453 GR.660 Class A/B/C/D Fasteners

SS ASTM A453 Gr.660 Class A/B/C/D Threaded Stud, SS ASTM A453 Gr.660 Class A/B/C/D Structural Bolts, Stainless Steel ASTM A453 Gr.660 Class A Plain Washer Stockholder, Stainless Steel ASTM A453 Gr.660 Class B Hexagon Nut Suppliers in India.

Ranfit Metal & Alloys is a renowned manufacturer and exporter of ASTM A453 GRADE 660 Class A / B / C / D Stainless Steel Fasteners, which is offered in different specifications as per the application requirements of the clients. To meet the stiff competition that is prevailing in the industry, we are into offering ASTM A453 GR 660 Class A Fasteners that we offer are sturdily constructed with the use of modern technology.

Available in varied sizes and dimensions, our range of ASTM A453 GR 660 Class B Fasteners is used in process instrumentation and general engineering. The offered ASTM A453 GR 660 Class C Fasteners have longer service life as these are made by utilizing quality testing raw materials. In order to cement our reputation in the market, we are engaged in catering an excellent range of ASTM A453 GR 660 Class D Fasteners with the aid of sophisticated technology. In addition, we offer these ASTM A453 GR 660 Class A Nuts in different specifications that can be customized as per the demands of customers. Due to its anti-oxidation qualities, ASTM A453 GR 660 Class A Bolts is often a popular solution. ASTM A453 GR 660 Class B Stud Bolts has smooth bore situations with grinded internal weld, which is available to suffice the clients’ piping requirements.

Stainless Steel ASTM A453 GR.660 Class A Hex Head Nut, ASTM A453 GR.660 Class B Hex Cap Screws, ASTM A453 GR.660 Class C Bolts and Screws, Stainless Steel ASTM A453 GR.660 Class D Threaded Stud Supplier & Exporter in India.


ASTM A453 GR.660 Class A/B/C/D Fasteners Specification

Grade Stainless Steel ASTM A453 GR.660 Class A/B/C/D
Specifications ASTM A453, DIN 933, DIN 931, ANSI, JIS standards and all International Standards
Size M 02 to M 160, Custom Sizes
Length 3mm to 200mm
Standards DIN, ASTM, BS and all International Standards
Types of ASTM A453 GR.660 Class A/B/C/D Nut Hex Head Nut, Eye Nut, Dome Nut, Wing Nut, T Nut, Panel Nut, Lock Nut, Coupling Nut, Square Nut, Acorn Nut etc.
Types of ASTM A453 GR.660 Class A/B/C/D Screw Hex Head Cap Screws, Socket Set Screws, Anchor Screws, Blind Rivet, Socket Head Screws, Concrete Screws, Shoulder Screws, Panel Screws, Threaded Screws, Machine Screws etc.
Types of ASTM A453 GR.660 Class A/B/C/D Washer Machine Washers, Flat Washer, Star Washers, Sealing Washer, Lock Washer, Split Washer etc.
Type Washers | Nuts | Screws | Bolts | Stud Bolts

ASTM A453 Grade 660 Class A/B/C/D Fasteners Useful Info

Grade 660 Class A Class B Class C Class D
Grade 651 Class A Class B
Grade 662 Class A Class B
Grade 665 Class A Class B
Grade 668 Class A Class B

ASTM A453 GR.660 Class A/B/C/D Equivalent Grades & Designation

AISI UNS BS Wr No. En Name DIN EN JIS AMS ASTM other names Additional Requirements
660 S 66286 HR 51 1.4944 X6NiCrTiMoV26-15  10269 SUS 660 5726 A286 Grade 600A incoloy a286 NACE MR-0175
HR 650 1.4980 2399 5731 A286 Grade 600B alloy a286 Cameron MS-003030
5732 A286 Grade 600C nickel alloy a286 Fairchild MS 301
5734 A286 Grade 600D a286 stainless steel 314 Elliott Turbine MS 618
5735 ASTM A286 GRADE 660A nas 660 Weatherford WS-881
5736 ASTM A286 GRADE 660B ati a286
5737 ASTM A286 GRADE 660C
5853 ASTM A286 GRADE 660D
5895 ASTM A638 TYPE1 —- —-
5525 ASTM A638 TYPE2
5858 ASTM A891 TYPE1
ASTM A891 TYPE2

Chemical Composition of ASTM A453 GR.660 Class A/B/C/D Fasteners

Element C Mn P S Si Ni Cr Mo Ti Al V B
Grade 660 0.08 max 2.00 max 0.040 max 0.030 max 1.00 max 24.0-27.0 13.5-16.0 1.00-1.50 1.9-2.35 0.35 max 0.10-0.50 0.001-0.010

Mechanical Properties of ASTM A453 GR.660 Class A/B/C/D Fasteners

ASTM A453 Class Tensile, Mpa Yield, Mpa Elong. %, min RA %, min
Grade 660 A, B , C & D 895 min 585 min 15 18
Tensile Class Tensile Strength, min Yield strength, 0.2% offset, min Elongation in 4D min, % Reduction of Area, min, %
ksi MPa ksi MPa
A, B and C 130 895 85 585 15 18
D 130 895 105 725 15 18

Physical Properties of ASTM A453 GR.660 Class A/B/C/D Fasteners

Tensile Class Brinell Hardness Number Approximate Rockwell Hardness B & C
min max
A, B and C 248 – 341 24 HRC 27 HRC
D 248 – 321 24 HRC 35 HRC

Physical Properties of ASTM A453 GR.660 Heat Treatment Requirements

Grade Class Solutiona Treatment Hardening Treatment
660 A 1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool
B 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool
C 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and oil quench 1425 +/- 25 °F [775 +/- 14 °C] hold 16h, air cool followed by 1200 +/- 25 °F [650 +/- 14 °C], hold 16h, air cool
D 1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench OR

1325 +/- 25 °F [720 +/- 14 °C] hold 16h, air cool followed by 1200 +/- 25 °F [650 +/- 14 °C], hold 16h, air cool

if neccessary to achieve properties, second age : 1200 +/- 25 °F [650 +/- 14 °C] hold 16h, air cool

1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench

Types of ASTM A453 GR.660 Class A/B/C/D Fasteners

SS ASTM A453 GR.660 Class A/B/C/D Hex Bolts

SS ASTM A453 GR.660 Class A/B/C/D Anchor Bolts

SS ASTM A453 GR.660 Class A/B/C/D Self Drilling Screws

SS ASTM A453 GR.660 Class A/B/C/D Hex Nuts

SS ASTM A453 GR.660 Class A/B/C/D Star Washers

SS ASTM A453 GR.660 Class A/B/C/D T Nuts

SS ASTM A453 GR.660 Class A/B/C/D Shoulder Bolts

SS ASTM A453 GR.660 Class A/B/C/D Dome/Accorn Nut

SS ASTM A453 GR.660 Class A/B/C/D Stud Bolts

SS ASTM A453 GR.660 Class A/B/C/D Allen Cap Screw

SS ASTM A453 GR.660 Class A/B/C/D Flanged Bolts

SS ASTM A453 GR.660 Class A/B/C/D Eye Bolts

SS ASTM A453 GR.660 Class A/B/C/D Square U-Bolts

SS ASTM A453 GR.660 Class A/B/C/D Square Nuts

SS ASTM A453 GR.660 Class A/B/C/D Socket Set Screw

SS ASTM A453 GR.660 Class A/B/C/D Panel Nuts

SS ASTM A453 GR.660 Class A/B/C/D U Bolt

SS ASTM A453 GR.660 Class A/B/C/D Square Nuts


SS ASTM A453 GR.660 Class A/B/C/D Fasteners Forms & Availability

Products Size
ASTM A453 GR.660 Class A/B/C/D Stud Bolt ASTM A453 GR.660 Class A/B/C/D® Alloy Bolts Sizes M02 - M160
ASTM A453 GR.660 Class A/B/C/D Punched Washer ASTM A453 GR.660 Class A/B/C/D Pan Head Screw
ASTM A453 GR.660 Class A/B/C/D Square Nut ASTM A453 GR.660 Class A/B/C/D Insert Nuts
ASTM A453 GR.660 Class A/B/C/D Welding Studs ASTM A453 GR.660 Class A/B/C/D Pan Head Screw
ASTM A453 GR.660 Class A/B/C/D Cap Screw ASTM A453 GR.660 Class A/B/C/D Foundation Bolts
ASTM A453 GR.660 Class A/B/C/D Threaded Rod ASTM A453 GR.660 Class A/B/C/D Hex Head Bolts
ASTM A453 GR.660 Class A/B/C/D Nuts ASTM A453 GR.660 Class A/B/C/D Washers
ASTM A453 GR.660 Class A/B/C/D Fender Washer ASTM A453 GR.660 Class A/B/C/D® Alloy Lock Nut
ASTM A453 GR.660 Class A/B/C/D Countersunk Slotted Screw ASTM A453 GR.660 Class A/B/C/D Double Ended Stud

ASTM A453 GR.660 Class A/B/C/D Hex Nuts Dimension Metric

D D s s max s min e max e min m m max m min
1/4" 0.2500 1/2" 0.5000 0.4880 0.5770 0.5560 15/64" 0.2500 0.2180
5/16" 0.3125 9/16" 0.5620 0.5460 0.6500 0.6220 19/64" 0.3140 0.2800
3/8" 0.3750 11/16" 0.6880 0.6690 0.7940 0.7630 23/64" 0.3770 0.3410
7/16" 0.4375 3/4" 0.7500 0.7280 0.8660 0.8300 27/64" 0.4410 0.4030
1/2" 0.5000 7/8" 0.8750 0.8500 1.0100 0.9690 31/64" 0.5040 0.4640
9/16" 0.5625 15/16" 0.9380 0.9090 1.0830 1.0370 35/64" 0.5680 0.5260
5/8" 0.6250 1.1/16" 1.0620 1.0310 1.2270 1.1750 39/64" 0.6310 0.5870
3/4" 0.7500 1.1/4" 1.2500 1.2120 1.4430 1.3820 47/64" 0.7580 0.7100
7/8" 0.8750 1.7/16" 1.4380 1.3940 1.6600 1.5890 55/64" 0.8850 0.8330
1" 1.0000 1.5/8" 1.6250 1.5750 1.8760 1.7960 63/64" 1.0120 0.9560
1.1/8" 1.1250 1.13/16" 1.8120 1.7560 2.0930 2.0020 1.7/64" 1.1390 1.0790
1.1/4" 1.2500 2" 2.0000 1.9380 2.3090 2.2090 1.7/32" 1.2510 1.1870
1.3/8" 1.3750 2.3/16" 2.1880 2.1190 2.5260 2.4160 1.11/32" 1.3780 1.3100
1.1/2" 1.5000 2.3/8" 2.3750 2.3000 2.7420 2.6220 1.15/32" 1.5050 1.4330
1.5/8" 1.6250 2.9/16" 2.5620 2.4810 2.9590 2.8280 1.19/32" 1.6320 1.5560
1.3/4" 1.7500 2.3/4" 2.7500 2.6620 3.1750 3.0350 1.23/32" 1.7590 1.6790
1.7/8" 1.8750 2.15/16" 2.9380 2.8440 3.3920 3.2420 1.27/32" 1.8860 1.8020
2" 2.0000 3.1/8" 3.1250 3.0250 3.6080 3.4490 1.31/32" 2.0130 1.9250
2.1/4" 2.2500 3.1/2" 3.5000 3.3880 4.0410 3.8620 2.13/64" 2.2510 2.1550
2.1/2" 2.5000 3.7/8" 3.8750 3.7500 4.4740 4.2750 2.29/64" 2.5050 2.4010
2.3/4" 2.7500 4.1/4" 4.2500 4.1120 4.9070 4.6880 2.45/64" 2.7590 2.6470
3" 3.0000 4.5/8" 4.6250 4.4750 5.3400 5.1020 2.61/64" 3.0130 2.8930
3.1/4" 3.2500 5" 5.0000 4.8380 5.7740 5.5150 3.3/16" 3.2520 3.1240
3.1/5" 3.5000 5.3/8" 5.3750 5.2000 6.2070 5.9280 3.7/16" 3.5060 3.3700
3.3/4" 3.7500 5.3/4" 5.7500 5.5620 6.6400 6.3410 3.11/16" 3.7600 3.6160
4" 4.0000 6.1/8" 6.1250 5.9250 7.0730 6.7550 3.15/16" 4.0140 3.8620

SS ASTM A453 GR.660 Class A/B/C/D Fasteners Standard

Hexagon Bolt / Set Screws Stud Bolt Hexagon Nuts Socket Cap screws
DIN 931 BS4882 DIN 934 DIN 912
DIN 933 DIN 976 BS 1768 DIN 6912
BS 1768 BS 1769 DIN 7984
UNI 5731 BS 1083 ANSI B18.3
UNI 5739 BS 3692 ISO 4762
ISO 4014 ISO 4032 UNI 5931
ISO 4017 ISO 4033 BS 2470
BS 1769 ANSI B18.2.2 BS 4168
BS 3692
ANSI B18.2.1
Socket & Slotted Set Screws Socket & Slotted Countersunk Screws Studs Washers
DIN 913 DIN 963 DIN 938 DIN 125
DIN 914 DIN 7991 DIN 939 DIN 9021
DIN 915 BS 4168 DIN 2510 BS 4320
DIN 916 BS 1981 BS 4439 BS 3410
DIN 551 BS 483 BS 2693
DIN 553 BS 2470 Spring Washers
DIN 438 DIN 127
BS 4168 BS 4464
BS 1802

SS ASTM A453 GR.660 Class A/B/C/D Washers Size Chart

Size USS SAE
Inside Diameter
(A)
Outside Diameter
(B)
Thickness
(C)
Inside Diameter
(A)
Outside Diameter
(B)
Thickness
(C)
#2 3/32″ 1/4″ 0.020″
#4 1/8″ 5/16″ 0.032″
#6 5/32″ 3/8″ 0.049″
#8 3/16″ 7/16″ 0.049″
#10 7/32″ 1/2″ 0.049″
#12 1/4″ 9/16″ 0.065″
1/4″ 5/16″ 0.734″ 0.065″ 9/32″ 5/8″ 0.065″
5/16″ 3/8″ 7/8″ 0.083″ 11/32″ 11/16″ 0.065″
3/8″ 7/16″ 1″ 0.083″ 13/32″ 13/16″ 0.065″
7/16″ 1/2″ 1-1/4″ 0.083″ 15/32″ 15/16″ 0.065″
1/2″ 9/16″ 1-3/8″ 0.109″ 17/32″ 1-1/16″ 0.095″
9/16″ 5/8″ 1-15/32″ 0.109″ 19/32″ 1-5/32″ 0.095″
5/8″ 11/16″ 1-3/4″ 0.134″ 21/32″ 1-5/16″ 0.095″
3/4″ 13/16″ 2″ 0.148″ 13/16″ 1-15/32″ 0.134″
7/8″ 15/16″ 2-1/4″ 0.165″ 15/16″ 1-3/4″ 0.134″
1″ 1-1/16″ 2-1/2″ 0.165″ 1-1/16″ 2″ 0.134″
1-1/8″ 1-1/4″ 2-3/4″ 0.165″
1-1/4″ 1-3/8″ 3″ 0.165″
1-3/8″ 1-1/2″ 3-1/4″ 0.180″
1-1/2″ 1-5/8″ 3-1/2″ 0.180″
1-5/8″ 1-3/4″ 3-3/4″ 0.180″
1-3/4″ 1-7/8″ 4″ 0.180″
2″ 2-1/8″ 4-1/2″ 0.213″

ASTM A453 GR.660 Class A/B/C/D Heavy Hex Hex Bolt Dimension

Grade 660 Bolts Diameter (D) Body Diameter (D) Across the Flats (F) Across the Corners © Head Height (H) Thread Lengths (T)
MAX MIN MAX MIN MAX MIN MAX MIN < 6” > 6”
1/2 0.515 0.482 0.875 0.85 1.01 0.969 0.364 0.302 1.25 1.5
5/8 0.642 0.605 1.062 1.031 1.227 1.175 0.444 0.378 1.5 1.75
3/4 0.768 0.729 1.25 1.212 1.443 1.383 0.524 0.455 1.75 2
7/8 0.895 0.852 1.438 1.394 1.66 1.589 0.604 0.531 2 2.25
1 1.022 0.976 1.625 1.575 1.876 1.796 0.7 0.591 2.25 2.5
1 1/8 1.149 1.098 1.812 1.756 2.093 2.002 0.78 0.658 2.5 2.75
1 1/4 1.277 1.223 2 1.938 2.309 2.209 0.876 0.749 2.75 3
1 3/8 1.404 1.345 2.188 2.119 2.526 2.416 0.94 0.81 3 3.25
1 1/2 1.531 1.47 2.375 2.3 2.742 2.622 1.036 0.902 3.25 3.5
1 3/4 1.785 1.716 2.75 2.662 3.175 3.035 1.196 1.054 3.75 4
2 2.039 1.964 3.125 3.025 3.608 3.449 1.388 1.175 4.25 4.5
2 1/4 2.305 2.214 3.5 3.388 4.041 3.862 1.548 1.327 4.75 5
2 1/2 2.559 2.461 3.875 3.75 4.474 4.275 1.708 1.479 5.25 5.5
2 3/4 2.827 2.711 4.25 4.112 4.907 4.688 1.869 1.632 5.75 6
3 3.081 2.961 4.625 4.475 5.34 5.102 2.06 1.815 6.25 6.

ASTM A453 GR.660 Class A/B/C/D Hex Bolt Dimensions Table

Grade 660 Bolts NOMINAL SIZE (D) BODY DIAMETER HEAD THICKNEASTM A193 ACROASTM A193 THE FLATS ACROASTM A193 CORNERS
D (MAX) D (MIN) H (MAX) H (MIN) F (MAX) F (MIN) C (MAX) C (MIN)
m10 10.00 9.78 6.63 6.17 17.00 15.73 18.48 17.77
m12 12.00 11.73 7.76 4.24 19.00 17.73 20.78 20.03
m14 14.00 13.73 9.09 8.51 22.00 20.67 24.25 23.35
m16 16.00 15.73 10.32 9.68 24.00 23.67 27.71 26.75
m20 20.00 19.67 12.88 12.12 30.00 29.16 34.64 32.95
m24 24.00 23.67 15.44 14.56 36.00 35.00 41.57 39.55
m30 30.00 29.67 19.48 17.92 46.00 45.00 53.12 50.85
m36 36.00 35.61 23.38 21.63 55.00 53.80 63.51 60.79
m42 42.00 41.38 26.97 25.03 65.00 62.90 75.06 71.71
m48 48.00 47.38 31.07 28.93 75.00 72.60 86.60 82.76
m56 56.00 55.26 36.2 33.80 85.00 82.20 98.15 93.71
m64 64.00 63.26 41.32 38.68 95.00 91.80 109.70 104.65
m72 72.00 71.26 46.45 43.55 105.00 101.40 121.24 115.60
m80 80.00 79.26 51.58 48.42 115.00 111.00 132.72 126.54
m90 90.00 89.13 57.74 54.26 130.00 125.50 150.11 143.07
m100 90.00 99.13 63.9 60.10 145.00 140.00 167.43 159.60

SS ASTM A453 GR.660 Class A/B/C/D Wood Screws Dimensions

Screw Number Max. Head Diameter Shank Diameter Root Diameter Threads
Per Inch
Basic Decimal Size Nearest
Fractional
Equivelant
Average
Decimal
Size
Nearest
Fractional
Equivelant
0 .119 .060 1/16 .040 3/64 32.00
1
.146 .073 5/64 .046 3/64 28.00
2 .172 .086 3/32 .054 1/16 26.00
3 .199 .099 7/64 .065 1/16 24.00
4 .225 .112 7/64 .075 5/64 22.00
5 .252 .125 1/8 .085 5/64 20.00
6 .279 .138 9/64 .094 3/32 18.00
7 .305 .151 5/32 .102 7/64 16.00
8 .332 .164 5/32 .112 7/64 15.00
9 .358 .177 11/64 .122 1/8

14.00

10 .385 .190 3/16 .130 1/8 13.00
11 .411 .203 13/64 .139 9/64 12.00
12 .438 .216 7/32 .148 9/64 11.00
14 .491 .242 1/4 .165 5/32 10.00
16 .544 .268 17/64 .184 3/16 9.00
18 .597 .294 19/64 .204 13/64 8.00
20 .650 .320 5/16 .233 7/32 8.00
24 .756 .372 3/8 .260 1/4 7.00

ASTM A453 GR.660 Class A/B/C/D Flat Washer Dimensions Chart

Bolt Size USS SAE
OD (in.) ID (in.) Thickness OD (in.) ID (in.) Thickness
1/8 (#6)       0.375 0.156 .036/.065
5/32 (#8)       0.438 0.188 .036/.065
3/16 (#10) 0.560 0.250 .036/.065 0.500 0.220 .036/.065
7/32 (#12)       0.562 0.250 .051/.080
1/4 (#14) 0.734 0.312 .051/.080 0.625 0.281 .051/.080
5/16 0.875 0.375 .064/.104 0.688 0.344 .051/.080
3/8 1.000 0.438 .064/.104 0.812 0.406 .051/.080
7/16 1.250 0.500 .064/.104 0.922 0.469 .051/.080
1/2 1.375 0.562 .086/.132 1.062 0.531 .074/.121
9/16 1.469 0.625 .086/.132 1.156 0.594 .074/.121
5/8 1.750 0.688 .108/.160 1.312 0.656 .074/.121
3/4 2.000 0.812 .122/.177 1.469 0.812 .108/.160
7/8 2.250 0.938 .136/.192 1.750 0.938 .108/.160
1 2.500 1.062 .136/.192 2.000 1.062 .108/.160
1 1/8 2.750 1.250 .136/.192 2.250 1.250 .108/.160
1 1/4 3.000 1.375 .136/.192 2.500 1.375 .136/.192
1 3/8 3.250 1.500 .153/.213 2.750 1.500 .136/.213
1 1/2 3.500 1.625 .153/.213 3.000 1.625 .153/.213
1 5/8 3.750 1.750 .153/.213      
1 3/4 4.000 1.875 .153/.213      
1 7/8 4.250 2.000 .153/.213      
2 4.500 2.125 .153/.213      
2 1/4 4.750 2.375 .320/.248      
2 1/2 5.000 2.625 .210/.280      
2 3/4 5.250 2.875 .228/.410S      
3 5.500 3.125 .249/.327

ASTM A453 GR.660 Class A/B/C/D Socket Head Cap Screw Dimensions Schedule

Nominal Thread. Hex Socket Size Body diameter and Head height Head Dia Soc. length
Size Pitch Max Min Max Min
J D /H A K
M3 0.5 2.50 3.00 2.86 5.50 5.20 1.3
M4 0.70 3.00 4.00 3.82 7.00 6.64 2.00
M5 0.8 4.00 5.00 4.82 8.50 8.14 2.70
M6 1.0 5.00 6.00 5.82 10.00 9.64 3.30
M8 1.25 6.00 8.00 7.78 13.00 12.57 4.3
M10 1.5 8.00 10.00 9.78 16.00 15.57 5.50
M12 1.75 10.00 12.00 11.73 18.00 17.57 6.60
M16 2.0 14.00 16.00 15.73 24.00 23.48 8.80
M20 2.5 17.00 20.00 19.67 30.00 29.48 10.70
M24 3.0 19.00 24.00 23.67 36.00 35.38 12.90

Other Types of ASTM A453 GR.660 Class A/B/C/D Fasteners

Stainless Steel A453 Grade 660 Cap Screw ASTM A453 Grade 660 Anchor Bolts
ASTM A453 660 CL D Stud Bolts Stainless Steel 453 660 CL D Coupler Nuts
A453 Gr 660 CL ABCD Pan Head Screw ASTM A453 Grade 660 Locking Nuts
ASTM A453 Gr 660 Class D Square Bolts A453 660 CL ABCD Fender Washer
A453 660 CL B Mushroom Head Square Neck Bolts ASTM A453 Grade 660 Class C Stud Bolts
ASTM A453 GR 660 CL DWashers A453 Gr 660 Class B T-Head Bolts
SS A453 Grade 660 Class A Hex Bolts ASTM A453 Grade 660 Class B Bolts
A453 660 Cl A Lock Nut SS A453 660 CL C Head Screw Exporter
Stainless Steel A453 660 CL ABCD Eye Bolts A453 660 Cl A Tapping Screw Supplier
A453 660 CL C Double Ended Stud SS A453 Grade 660 Class A Fasteners

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