DIN 962 Bolt with Cotter Pin Hole

The DIN 962 bolt differs from analogues under DIN 931, 933, 960, 961 by having a special hole. If the marking includes the letter S, the hole is located at the tip of the shank and is intended for installing a cotter pin. The hole for threading a lock wire for sealing is located on the head of the product, whose marking includes the letter combination SK.

DIN 962 bolt characteristics

• material – carbon steel property class 8.8, 1.9, or stainless steel grades A2, A4;
• coating – electroplated zinc;
• design – threaded working shank, hexagon head for tightening with a wrench, hole for a cotter pin or seal;
• the cotter pin protects the connection from spontaneous loosening;
• application area – mechanical engineering, railway industry, aircraft manufacturing, rocket engineering.

The DIN 962 bolt is used in wheel-to-shaft mounting assemblies, including in the design of a mobile concrete mixer or wheelbarrow.

Installation procedure for a bolt with a cotter pin hole

A channel is drilled in the parts to be joined according to the layout. Then:

• the DIN 962 bolt of the specified size is installed;
• a nut – slotted or ordinary with a special hole – is screwed onto the end of the shank opposite the head;
• the slot or hole in the nut is aligned with the hole in the bolt shank, and a cotter pin is inserted into it;
• the ends of the cotter pin are bent to prevent the nut from turning or loosening, and the bolt from unscrewing.

FLOK supplies DIN 962 bolts in the size range specified by the standard.

Sizes of hexagon head bolts with a cotter pin hole DIN 962:

d	3	4	5	6	7	8	10	12	14	16	18	20	22	24	27	30	33	36
d1	0.8	1	1.2	1.6	1.6	2	2.5	3.2	3.2	4	4	4	5	5	5	6.3	6.3	6.3
le	2	2.2	2.6	3.3	3.3	4	5	6	6.5	7	7.7	7.7	8.7	10	10	11.3	11.3	12.5

Sizes of holes in the bolt head for a seal per DIN 962

d	M3	M4	M5	M6	M7	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36
d₁	-	1.2	1.2	1.6	1.6	2	2	2	2	3	3	3	3	3	3	3	4	4

Sizes of holes in the bolt shank for a cotter pin per DIN 962

d	M3	M4	M5	M6	M7	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36
d₁	0.8	1	1.2	1.6	1.6	2	2.5	3.2	3.2	4	4	4	5	5	5	6.3	6.3	6.3
le	2	2.2	2.6	3.3	3.3	4	5	6	6.5	7	7.7	7.7	8.7	10	10	11.3	11.3	12.5

Designations:

d - nominal thread diameter

d₁ - bolt hole diameter

le - distance from the end of the bolt shank

k - bolt head height