Description

N.M Enterprises is a leading manufacturer and supplier of high-quality Carriage Bolts, Square Neck Mushroom Head Bolts, and Cup Head Bolts in India. Our industrial fasteners are manufactured as per DIN 603, DIN 607, DIN 605, and DIN 608 standards to ensure superior strength, precision, corrosion resistance, and long-lasting performance.

Metric Series – Carriage Bolt Dimensions

Diameter (d)	M6	M8	M10	M12	M16	M20
Pitch	1	1.25	1.5	1.75	2	2.5
dk max.	16.55	20.65	24.65	30.65	38.8	46.8
f max.	4.6	5.6	6.6	8.75	12.9	15.9
k max.	3.88	4.88	5.38	6.95	8.95	11.05
v max.	6.48	8.58	10.58	12.7	16.7	20.84

Metric Series – Approx Count Per 50kg

Length	M6	M8	M10	M12	M16	M20
20mm	6579	3623	2203	–	–	–
30mm	5208	2941	1805	1094	–	–
50mm	3571	2000	1285	817	420	–
80mm	2427	1359	870	575	303	184
100mm	2000	1116	715	476	254	155
150mm	1429	772	495	333	181	112
200mm	–	–	382	256	140	84

Inch Series – Carriage Bolt Dimensions

Diameter	1/4″	5/16″	3/8″	7/16″	1/2″
dk max	0.594	0.719	0.844	0.969	1.094
k max	0.145	0.176	0.208	0.239	0.27
v max	0.26	0.324	0.388	0.452	0.515
f max	0.156	0.187	0.219	0.25	0.281

Inch Series – Approx Count Per 50kg

Length	1/4″	5/16″	3/8″	7/16″	1/2″
1″	7100	4148	2660	2000	1390
2″	3730	2300	1390	1110	820
3″	2500	1597	1078	825	625
4″	1793	1192	833	562	444
5″	1458	944	640	471	358
6″	1228	800	546	398	308