10b21 Steel Tensile Strength
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10b21 Steel Tensile Strength

Rolok semblex
Loss or repair of assemblies due to undersize

or oversize tapped threads Loss or repair of assemblies due to tap breakage or malfunction Moving, storage and scheduling of parts to and from the Tapping Dept.The elimination of tapping avoids these problems: Cross threading of machine screws into pretapped holes Installing machine screws into tapped holes clogged with paint or other foreign material Threading directly into untapped, less expensive,

tubular rivets and inserts Use of less expensive, plain, unthreaded weld bushings Use of punch-extruded holes - eliminates staked, weld and clinch nuts Rolok screws roll-form smooth, high strength mating, no chip' threads, with lower uniform driving torque.This provides an expanded Strip-to-Drive Ratio.Save on all of these avoidable costs common to use of self tapping screws: Eliminates cleaning of chips and burrs Eliminates chips or burrs that cause short circuits in electrical equipment

Minimizes downtime on production line by providing uniform, trouble-free performance Rolok screws form threads and fasten quickly and easily.This provides users with the highest performance characteristics and the lowest

In-place cost.Benefit from all of these savings areas which are unobtainable with other types
of screws.Eliminates drilling - holes can be cored or punched

Eliminates lockwashers and locking devices

Fastening is stronger, thus providing higher quality
Smaller diameter screws or fewer screws provides equivalent holding power Minimizes production line downtime by providing trouble-free driving Speeds production with lower driving torque and minimal operator fatigue Reduces inventory and purchasing costs by permitting extensive standardization - one Rolok screw can replace many other different types of screws TOMORROW'S TECHNOLOGY IS WITHIN TODAY As you can see, the future of fastener technology is here.Unparalleled conveniences, unrivaled holding powers and strip-to-drive ratios, phenomenal cost savings and complete custom capabilities make the Rolok design the obvious choice for all your future fastener needs.Catch the future wave of fastener engineering today with the

fastener.TAPTITE is registered trademark of: REMINC, Research Engineering & Manufacturing, Inc.

DIMENSION STANDARDS

SIZE (C) CIRCUMSCRIBING DIAMETER

MAX.

MIN.

POINT DIAMETER

(REF.) MINIMUM TORSIONAL STRENGTH (IN-LB) 2-56 .0875 .0835 .065 6 3-48 .1010 .0970 .076 10 4-40 .1145 .1105 .085 14 5-40 .1275 .1235 .096 22 6-32 .1410 .1350 .103 24 8-32 .1670 .1610 .129 48 10-24 .1940 .1880 .144 65 10-32 .1930 .1870 .154 81 12-24 .2200 .2140 .170 105 1/4-20 .2550 .2490 .180 160 5/16-18 .3180 .3120 .253 340 3/8-16 .3810 .3750 .300 620 7/16-14 .4450 .4370 .356 950 1/2-13 .5080 .4990 .419 1450 Length tolerances: Up to 3/4" -+.000/-.030"

Over 3/4" to 1 1/2" -+.000/-.050"

Over 1 1/2" & up -+.000/-
10b21 steel tensile strength
Thread Rolling Engineering Standards - Semblex …
C-10B21 steel which is case hardened to a minimum of 135,000 PSI straight tensile strength. This rating is twice that of a standard (isibang.ac.in)
Iron And Steel Co. Ltd.
IRON AND STEEL CO. LTD. ... Good control over mechanical properties such as tensile strength and reduction area ... Boron Grades 10B21 - 21C10BT - 15B25 - 26C10BT - (semblex.com)
Quintain Steel Co.,ltd Product Specification Manual Of Steel …
3 10B21 0.18~0.23 0.10 max 0.70~1.00 0.030 max 0.035 max - ... Steel Bending test Grade Yield strength (Y.S) N/mm2 Tensile ... Tensile strength / Yield strength NO. d (sunflagsteel.com)
.060" Heat Treatment: Case Hardened - Core 28 to 38 Rc

Surface 45 Rc (Min.)
(C) CIRCUMSCRIBING DIAMETER MAX.

MIN.POINT DIAMETER (REF.MINIMUM TORSIONAL STRENGTH M2-0.4 2.06 1.98 1.52 0.6 M2.5-0.45 2.57 2.46 2.01 1.2 M3-0.50 3.07 2.97 2.41 2.2 M3.5-0.6 3.58 3.43 2.79 3.5 M4-0.7 4.09 3.93 3.18 5.2 M4.5-0.75 4.60 4.44 3.56 7.5 M5-0.8 5.09 4.93 3.94 10.5 M6-1.0 6.10 5.94 4.62 17.7 M7-1.0 7.13 6.97 5.84

31 M8-1.25 8.13 7.98 6.48

43 Ml0-1.5 10.15 9.99 8.13

87 M12-1.75 12.18 11.95 9.93
152 Length tolerances: Up to 20 mm - +0.0/-0.8 mm

Over 20 mm to 40 mm -+0.0/-1.2 mm

40 mm & over -+0.0/-1.5 mm Heat Treatment: Case Hardened - Core 28 to 38 Rc

Surface 45 Rc (Min.)

THREAD ROLLING ENGINEERING STANDARDS TORQUE VALUES INCH TORQUE REQUIREMENTS FOR STEEL (RB 75-90) SCREW OPTIMUM HOLE SIZE OPTIMUM METAL THICKNESS FAILING TORQUE TIGHTENING TORQUE LOOSENING TORQUE 2-56 .079 3/32
1-2
11-14

5 4-5 3-48 .090 1 /8
3-6
15-16 7 5-7 4-40 .102 1 /8
3-5
20-25 10
7-10 5-40 .115 1 /8
5-8
24-31 16
8-11 6-32 .125 1 /8
7-10
26-33 20

10-13 8-32 .150 3/16
8-11
75-85 36

18-22 10-24 .173 3/16

15-18

100-120 51 25-32 10-32 .177 3/16

14-18

105-120 59 30-37 12-24 .200 1 /4

24-30

155-175 81 40-52 1/4-20 .229 1 /4

29-35

210-250 123 63-78 5/16 - 18 .290 5/16 110-130

450-600 253 150-185 3/8 - 16 .350 3/8

95-125

950-1150 450 230-320 7/16 - 14 .408 7/16 230-280

1500-1800 736 340-390

- 13 .469 1 /2 270-360

1950-2250 1000 500-570 All torque values are in IN-LBS.

The above values are only approximations to be used as guidelines.Actual assembly conditions may vary.Optimumthread engagement and joint integrity is achieved at four full threads, or approximately one screw diameter.Valuesfor sizes not listed can be made available upon request.METRIC TORQUE REQUIREMENTS FOR STEEL (RB 75-90) SCREW OPTIMUM HOLE SIZE OPTIMUM METAL THICKNESS DRIVING TORQUE FAILING TORQUE TIGHTENING TORQUE LOOSENING TORQUE M3-0.5 2.79 3

.40-.75

2.3-3.7 1.6

0.8-1.4 M4-0.7 3.70 4

1.0-1.5

6.8-10.2 3.7 1.7-2.3 M5-0.8 4.66 5

1.9-3.1

10.2-14.7 7.6

4.0-5.1 M6-1.0 5.58 6

3.3-4.5

17.5-24.3 12.7

6.8-8.5 M8-1.25 7.47 8 5.6-10.7

54.2-65.5 31.7 17.5-21.5 M10-1.5 9.37 62.6 31.6-39.5 M12-1.75 11.26 12

27.1-36.2 172.9-202.2 110.9 55.4-63.3 All torque values are in N-m.The above values are only approximations to be used as guidelines.

Actual assembly conditions may vary.Optimum thread engagement and joint integrity is achieved at four full threads, or approximately one screw diameter.Values for sizes not listed can be made available upon request.

THREAD ROLLING ENGINEERING STANDARDS

HOLE DIAMETER (INCHES) FOR THREAD ENGAGEMENTS BY PERCENT 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 45% 40% 35% 2-56 .0744 .0750 .0756 .0761 .0767 .0773
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