
Introduction
Allen CSK As per Din 7991
Carriage bolt are also known as coach bolt. Carriage bolt are extensively used for security fixings, such as lock and hinges where bolt can be only removable from one side. Carriage bolt are mostly used for wooden frames, ships etc.

Steel Grades: 8.8, SS 304
Finish: Self, Black, Bright Zinc, Hot Dip Galvanized (ROHS)
Dimensions
Allen CSK As per Din 7991 | |||||||||
DIAMETER (d) | 3 x 0.5 P | 4 x 0.7 P | 5 x 0.8 P | 6 x 1 p | 8 x 1.25 P | 10 x 1.5 P | 12 x 1.75 | ||
HEAD DIAMETER (D) | Min | 5.70 | 7.64 | 9.64 | 11.57 | 15.57 | 19.48 | 23.48 | |
Max | 6.00 | 8.00 | 10.00 | 12.00 | 16.00 | 20.00 | 24.00 | ||
SOCKET DEPTH (t) | Min | 0.95 | 1.55 | 2.05 | 2.25 | 3.20 | 4.10 | 4.30 | |
Max | 1.20 | 1.80 | 2.30 | 2.50 | 3.50 | 4.40 | 4.60 | ||
SOCKET ACROSS FLAT (S) | Nom | 2.00 | 2.50 | 3.00 | 4.00 | 5.00 | 6.00 | 8.00 | |
Min | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.03 | ||
Max | 2.10 | 2.60 | 3.10 | 4.12 | 5.14 | 6.14 | 8.18 | ||
SOCKET CORNER FLAT (e) | Min | 2.30 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | |
HEAD THICKNESS (k) | Min | 1.70 | 2.30 | 2.80 | 3.30 | 4.40 | 5.50 | 6.50 | |
Length | Min | Max | |||||||
16 | 15.10 | 16.90 | ACK03016 | ACK04016 | ACK05016 | ACK06016 | ACK08016 | ACK10016 | ACK12016 |
20 | 18.95 | 21.05 | ACK03020 | ACK04020 | ACK05020 | ACK06020 | ACK08020 | ACK10020 | ACK12020 |
25 | 23.95 | 26.05 | ACK03025 | ACK04025 | ACK05025 | ACK06025 | ACK08025 | ACK10025 | ACK12025 |
30 | 28.95 | 31.05 | ACK03030 | ACK04030 | ACK05030 | ACK06030 | ACK08030 | ACK10030 | ACK12030 |
35 | 33.75 | 36.25 | ACK03035 | ACK04045 | ACK05035 | ACK06035 | ACK08035 | ACK10035 | ACK12035 |
40 | 38.75 | 41.25 | ACK03040 | ACK04040 | ACK05040 | ACK06040 | ACK08040 | ACK10040 | ACK12040 |
45 | 43.75 | 46.25 | ACK03045 | ACK04045 | ACK05045 | ACK06045 | ACK08045 | ACK10045 | ACK12045 |
50 | 48.75 | 51.25 | ACK03050 | ACK04050 | ACK05050 | ACK06050 | ACK08050 | ACK10050 | ACK12050 |
55 | 53.50 | 56.50 | ACK03055 | ACK04055 | ACK05055 | ACK06055 | ACK08055 | ACK10055 | ACK12055 |
60 | 58.50 | 61.50 | ACK03060 | ACK04060 | ACK05060 | ACK06060 | ACK08060 | ACK10060 | ACK12060 |
65 | 63.50 | 66.50 | ACK03065 | ACK04065 | ACK05065 | ACK06065 | ACK08065 | ACK10065 | ACK12065 |
70 | 68.50 | 71.50 | ACK03070 | ACK04070 | ACK05070 | ACK06070 | ACK08070 | ACK10070 | ACK12070 |
80 | 78.50 | 81.50 | ACK03080 | ACK04080 | ACK05080 | ACK06080 | ACK08080 | ACK10080 | ACK12080 |
90 | 88.25 | 91.75 | ACK03090 | ACK04090 | ACK05090 | ACK06090 | ACK08090 | ACK10090 | ACK12090 |
100 | 98.25 | 101.75 | ACK03100 | ACK04100 | ACK05100 | ACK06100 | ACK08100 | ACK10100 | ACK12100 |
110 | 108.25 | 111.75 | ACK03110 | ACK04110 | ACK05110 | ACK06110 | ACK08110 | ACK10110 | ACK12110 |
120 | 118.25 | 121.75 | ACK03120 | ACK04120 | ACK05120 | ACK06120 | ACK08120 | ACK10120 | ACK12120 |
130 | 128.00 | 132.00 | ACK03130 | ACK04130 | ACK05130 | ACK06130 | ACK08130 | ACK10130 | ACK12130 |
140 | 138.00 | 142.00 | ACK03140 | ACK04140 | ACK05140 | ACK06140 | ACK08140 | ACK10140 | ACK12140 |
150 | 148.00 | 152.00 | ACK03150 | ACK04150 | ACK05150 | ACK06150 | ACK08150 | ACK10150 | ACK12150 |
160 | 156.00 | 164.00 | ACK03160 | ACK04160 | ACK05160 | ACK06160 | ACK08160 | ACK10160 | ACK12160 |
180 | 176.00 | 184.00 | ACK03180 | ACK04180 | ACK05180 | ACK06180 | ACK08180 | ACK10180 | ACK12180 |
200 | 195.40 | 204.60 | ACK03200 | ACK04200 | ACK05200 | ACK06200 | ACK08200 | ACK10200 | ACK12200 |
Allen CSK As per Din 7991 | ||||||
DIAMETER (d) | 14 x 2 P | 16 x 2 P | 20 x 2.5 P | 24 x 3 P | ||
HEAD DIAMETER (D) | Min | 26.48 | 29.48 | 35.38 | 38.38 | |
Max | 27.00 | 30.00 | 36.00 | 39.00 | ||
SOCKET DEPTH (t) | Min | 4.50 | 5.00 | 5.60 | 9.87 | |
Max | 4.80 | 5.30 | 5.90 | 10.30 | ||
SOCKET ACROSS FLAT (S) | Nom | 10.00 | 10.00 | 12.00 | 14.00 | |
Min | 10.03 | 10.03 | 12.03 | 14.03 | ||
Max | 10.18 | 10.18 | 12.21 | 14.21 | ||
SOCKET CORNER FLAT (e) | Min | 11.43 | 11.43 | 13.72 | 16.00 | |
HEAD THICKNESS (k) | Min | 7.00 | 7.50 | 8.50 | 14.00 | |
Length | Min | Max | ||||
25 | 23.95 | 26.05 | ACK14025 | ACK16025 | ||
30 | 28.95 | 31.05 | ACK14030 | ACK16030 | ||
35 | 33.75 | 36.25 | ACK14035 | ACK16035 | ACK20035 | ACK24035 |
40 | 38.75 | 41.25 | ACK14040 | ACK16040 | ACK20040 | ACK24040 |
45 | 43.75 | 46.25 | ACK14045 | ACK16045 | ACK20045 | ACK24045 |
50 | 48.75 | 51.25 | ACK14050 | ACK16050 | ACK20050 | ACK24050 |
55 | 53.5 | 56.5 | ACK14055 | ACK16055 | ACK20055 | ACK24055 |
60 | 58.5 | 61.5 | ACK14060 | ACK16060 | ACK20060 | ACK24060 |
65 | 63.5 | 66.5 | ACK14065 | ACK16065 | ACK20065 | ACK24065 |
70 | 68.5 | 71.5 | ACK14070 | ACK16070 | ACK20070 | ACK24070 |
80 | 78.5 | 81.5 | ACK14080 | ACK16080 | ACK20080 | ACK24080 |
90 | 88.25 | 91.75 | ACK14090 | ACK16090 | ACK20090 | ACK24090 |
100 | 98.25 | 101.75 | ACK14100 | ACK16100 | ACK20100 | ACK24100 |