SHRI PARVATI INDUSTRIES · TRADEMARK BRAND SPFL®

SPFL® Industrial Bolts

Bolts for B2B industrial requirements. Select the bolt type, nominal diameter, thread, length, material/grade, finish and required standard; share your drawing or specification for confirmation.

SPFL® BOLT RANGE

All Bolt Product Types

Select a bolt type to view its product page and specification details.

No.	Bolt
1	HEX HEAD BOLT
2	SQUARE HEAD BOLT
3	T HEAD BOLT
4	SOCKET HEAD BOLT
5	ALLEN HEAD BOLT
6	STUD BOLT
7	BUTTON HEAD BOLT
8	LAG BOLT
9	WEDGE ANCHOR BOLT
10	PIN ANCHOR BOLT
11	FOUNDATION BOLT
12	COUNTERSUNK BOLT
13	COACH BOLT
14	U BOLT
15	SQUARE U BOLT
16	L BOLT
17	J BOLT
18	HOOK BOLT
19	EYE BOLT
20	DOME BOLT

SPFL® BOLT RANGE

Hex, Fitting & High-Strength Bolts

DIN 558 – Fully threaded machine bolts

Hex bolt product illustration · Open full image

d₁	s	e	k
M6	10	10.89	4
M8	13	14.2	5.3
M10	17	18.72	6.4
M12	19	20.88	7.5
M16	24	26.17	10
M20	30	32.95	12.5

DIN 609 – Hex fitting bolts with long threaded portion

d	k	e	s	b = to 50	b = to 150	b = to 200
M8	5.3	14.38	13	14.5	16.5	21.5
M10	6.4	17.77	16	17.5	19.5	24.5
M12	7.5	19.85	18	20.5	22.5	27.5
M14	8.8	22.78	21	22	24	29
M16	10	26.17	24	25	27	32
M20	12.5	32.95	30	28.5	30.5	35.5
M24	15	39.55	36	–	36.5	41.5
M30	19	50.85	46	–	43	48

DIN 610 – Hex fitting bolts with short threaded portion

d	k	e	s max.	b = to 50	b = to 150	b = to 200
M8	5.3	14.38	13	11.5	13.5	18.5
M10	6.4	17.77	16	13.5	15.5	20.5
M12	7.5	19.85	18	15.5	17.5	22.5
M14	8.8	22.78	21	17	19	24
M16	10	26.17	24	19	21	26
M20	12.5	32.95	30	22.5	24.5	29.5
M24	15	39.55	36	26.5	28.5	33.5
M30	19	50.85	46	–	34	39

DIN 6914 – Hex bolts for high-strength structural bolting

d	s	e	k	b
M12	22	23.91	8	21
M16	27	29.56	10	26
M20	32	35.03	13	31
M22	36	39.55	14	32
M24	41	45.2	15	34
M27	46	50.85	17	37
M30	50	55.37	19	40
M36	60	66.44	23	48

DIN 931 – Hexagon head screws, partially threaded

d₁	b to 125	b to 200	b over 200	k	e	s
M4	14	–	–	2.8	7.66	7
M5	16	–	–	3.5	8.79	8
M6	18	24	–	4	11.05	10
M8	22	28	–	5.3	14.38	13
M10	26	32	45	6.4	18.9	17
M12	30	36	49	7.5	21.1	19
M14	34	40	53	8.8	24.49	22
M16	38	44	57	10	26.75	24
M18	42	48	61	11.5	30.14	27
M20	46	52	65	12.5	33.53	30
M22	50	56	69	14	35.72	32
M24	54	60	73	15	39.98	36
M27	60	66	79	17	45.2	41
M30	66	72	85	18.7	50.85	46
M33	72	78	91	21	55.37	50
M36	78	84	97	22.5	60.79	55
M42	90	96	109	26	71.3	65
M45	96	102	115	28	76.95	70
M48	102	108	121	30	82.60	75

DIN 933 – Hexagon head screws, fully threaded

d₁	k	e	s
M3	2	6.01	5.5
M4	2.8	7.66	7
M5	3.5	8.79	8
M6	4	11.05	10
M8	5.3	14.38	13
M10	6.4	18.9	17
M12	7.5	21.1	19
M14	8.8	24.49	22
M16	10	26.75	24
M18	11.5	30.14	27
M20	12.5	33.53	30
M22	14	35.72	32
M24	15	39.98	36
M27	17	45.2	41
M30	18.7	50.85	46
M33	21	55.37	50
M36	22.5	60.79	55
M42	26	71.3	65
M48	30	82.6	75

DIN 960 – Hex screws, metric fine thread, part thread

d₁	s	e	k	b= to 125	b= to 150	b= to 200
M8 x 1	13	14.38	5.3	22	28
M10 x 1	17	18.9	6.4	26	32
M10 x 1.25	17	18.9	6.4	26	32
M12 x 1.25	19	21.1	7.5	30	36
M12 x 1.5	19	21.1	7.5	30	36
M14 x 1.5	22	24.49	8.8	34		40
M16 x 1.5	24	26.75	10	38		44
M18 x 1.5	27	30.14	11.5	42		48
M20 x 1.5	30	33.53	12.5	46		52
M20 x 2	30	33.53	12.5	46		52
M24 x 2	36	39.98	15	54		60

DIN 961 – Hex screws, metric fine thread, full thread

d₁	s	e	k
M8	13	14.38	5.3
M10	17	18.9	6.4
M12	19	21.1	7.5
M14	22	24.49	8.8
M16	24	26.75	10
M18	27	30.14	11.5
M20	30	33.53	12.5
M22	32	35.72	14
M24	36	39.98	15
M27	41	45.63	17
M30	46	51.28	19
M33	50	55.8	21
M36	55	61.31	23
M39	60	66.96	25
M42	65	72.61	26
M45	70	78.26	28
M48	75	83.91	30
M52	80	89.56	33

SPFL® BOLT RANGE

Tee-Head & U-Bolts

DIN 186 – Tee-head bolts with square head

T-head bolt product illustration · Open full image

d₁	b	k	s
M6	18	4.5	6
M8	22	5.5	8
M10	26	7	10
M12	30	8	12
M16	38	10.5	16
M20	46	13	20

U-bolt standard

U-bolt product illustration · Open full image

Nominal Pipe Size (Imperial)	Nominal Pipe Size (Metric)	A	A1	C	Thread Size
1/2	15	12	48	29	M6
3/4	20	15	53	35	M6
1	25	20	60	42	M6
1 1/4	32	25	70	52	M8
1 1/2	40	30	75	60	M8
2	50	35	85	72	M8
2 1/2	65	40	100	88	M10
3	80	40	115	103	M10
4	100	40	140	130	M12
5	125	40	165	153	M12
6	150	50	195	182	M12
7	175	50	225	209	M12
8	200	50	245	240	M16
9	225	50	275	264	M16
10	250	50	315	293	M16
12	300	50	360	342	M16
14	350	85	395	378	M16
16	400	85	485	428	M16
18	450	85	540	478	M16
20	500	85	595	528	M16

DIN 188 – Tee-head bolts with double nip

d	b	k	m	n
M8	22	5.5	18	8
M10	26	7	21	10
M12	30	8	26	12
M16	38	10.5	30	16
M24	54	15	43	24

SPFL® BOLT RANGE

Allen / Socket-Head Bolts

DIN 7991 dimensional table from the supplied machine-screw technical sheet, shown here under the Bolt category for the requested product grouping.

DIN 7991 – Flat Socket Head Cap Screws Specifications

Allen countersunk bolt product illustration · Open full image

Catalogue reference range: M3 to M24

d1	b	t	s	k max	d2
M3	12	1.2	2	1.7	6
M4	14	1.8	2.5	2.3	8
M5	16	2.3	3	2.8	10
M6	18	2.5	4	3.3	12
M8	22	3.5	5	4.4	16
M10	26	4.4	6	5.5	20
M12	30	4.6	8	6.5	24
M16	38	5.3	10	7.5	30
M20	46	5.9	12	8.5	36
M24	54	10.3	14	14	39

Allen Cap Bolts: DIN 912 · Size range: M2–M36 (3/16″–3/4″).

SPFL® BOLT RANGE

Eye Bolts

DIN 444 – Eye bolts

Eye bolt product illustration · Open full image

d	d₁	d₂	b to 125	b to 200
M5	12	5	16
M6	14	6	18
M8	18	8	22	28
M10	20	10	26	32
M12	25	12	30	36
M16	32	16	38	44
M20	40	18	46	52

DIN 580 – Lifting eye bolts

Lifting eye bolt product illustration · Open full image

d₁	h	b	d₂	d₃	d₄	k
M6	27.5	12	27	19	14	6.5
M8	36	13	36	20	20	8
M10	45	17	45	25	25	10
M12	53	20.5	54	30	30	12
M14	62	27	63	35	35	14
M16	62	27	63	35	35	14
M20	71	30	72	40	40	16
M22	90	36	90	50	50	20
M24	90	36	90	50	50	20
M27	109	45	108	65	60	24
M30	109	45	108	65	60	24
M33	128	54	126	75	70	28
M36	128	54	126	75	70	28
M42	147	63	144	85	80	32
M45	168	68	166	100	90	38
M48	168	68	166	100	90	38
M52	187	78	184	110	100	42
M56	187	78	184	110	100	42
M64	208	90	206	120	110	48
M72	260	100	260	150	140	60
M80	298	112	296	170	160	68

SPFL® BOLT RANGE

Stud Bolts & Weld Studs

DIN 525 – Weld studs with hexagon nuts

Full-thread stud product illustration · Open full image

d₁	l	b
M6	130	35
M8	140	40
M10	150	45
M12	170	55
M14	180	60
M16	190	65
M18	200	70
M20	210	75
M22	220	80
M24	230	85
M27	250	90
M30	270	105
M33	290	115
M36	310	125

DIN 835 – Studs, tap end – 2d

d₁	b	e	x
M6	18	12	2.5
M8	22	16	3.2
M10	26	20	3.8
M12	30	24	4.3
M16	38	32

DIN 939 – Studs, tap end – 1.25d

d₁	b	e
M4	14	5
M5	16	6.5
M6	18	7.5
M7	20	9
M8	22	10
M10	26	12
M12	30	15
M14	34	18
M16	38	20
M18	42	22
M20	46	25
M22	50	28
M24	54	30
M27	60	35
M30	66	38
M33	72	42
M36	78	45
M39	84	50
M42	90	52
M45	96	58
M48	102	60
M52	110	65

DIN 976 – Stud bolt, full thread

d	Pitch	Length
M-4	0.7	10 mm to 3 m
M-5	0.8	10 mm to 3 m
M-6	1.0	12 mm to 3 m
M-8	1.25	12 mm to 3 m
M-10	1.5	15 mm to 6 m
M-12	1.75	20 mm to 6 m
M-14	2.0	30 mm to 6 m
M-16	2.0	35 mm to 6 m
M-18	2.5	50 mm to 6 m
M-20	2.5	50 mm to 6 m
M-22	2.5	50 mm to 6 m
M-24	3.0	60 mm to 6 m
M-27	3.0	100 mm to 6 m
M-30	3.5	100 mm to 6 m
M-33	3.5	100 mm to 6 m
M-36	4.0	150 mm to 6 m
M-39	4.0	200 mm to 6 m
M-42	4.5	200 mm to 5 m
M-45	4.5	250 mm to 5 m
M-48	5.0	300 mm to 5 m
M-52	5.0	350 mm to 5 m
M-56	5.5	350 mm to 5 m
M-60	5.5	350 mm to 5 m

SPFL® BOLT RANGE

Flange, Carriage & Special Bolt Types

Flange Bolts

DIN 6921 · IS 15582

Size range: M4–M12

Carriage Bolts

DIN 603

Size range: M5–M12

Allen Cap Bolts

DIN 912

Size range: M2–M36 · 3/16″–3/4″

L, J & T Bolts

As per drawing

Size range: M5–M24

Dome-Head Bolts

Size range: M4–M24

Anti-Theft Bolts

Size range: M6–M12

SPFL® BOLT RANGE

Bolt Tightening Torque Reference

TECHNICAL REFERENCE

Bolt Tightening Torque Reference

The supplied torque table specifies Stainless Steel 304 / 316 and states 65% yield stress, K factor 0.2 and a clean, burr-free thread with quality MoS₂ lubricant. The source warns that unlubricated or uncoated stainless fasteners can seize and may have a higher K factor. Treat values as reference only; confirm the fastener grade, lubrication and application.

Stainless steel hex bolts

Recommended tightening torque (Nm)

Nominal size	Pitch (mm)	Stress area (mm²)	Class 50 (Nm)	Class 70 (Nm)	Class 80 (Nm)
M3	0.50	5.03	0.4	0.9	1.2
M4	0.70	8.78	1.0	2.1	2.7
M5	0.8	14.20	1.9	4.2	5.5
M6	1.00	20.10	3.3	7.1	9.4
M8	1.25	36.60	8.0	17.1	22.8
M10	1.50	58.00	15.8	33.9	45.2
M12	1.75	84.30	27.6	59.2	78.9
M14	2.00	115.00	44.0	94.2	125.6
M16	2.00	157.00	68.6	147.0	195.9
M18	2.50	192.00	94.3	202.2	269.6
M20	2.50	245.00	133.8	286.7	382.2
M22	2.50	303.00	182.0	390.0	519.9
M24	3.00	353.00	231.3	495.6	660.8
M27	3.00	459.00	338.3	725.0	966.7
M30	3.50	561.00	459.5	984.6	1312.7
M33	3.50	694.00	625.2	1339.8	1786.4
M36	4.00	817.00	802.9	1720.6	2294.1
M39	4.00	976.00	1039.1	2226.7	2969.0

SPFL® BOLT RANGE

L-Bolt Technical Data

TECHNICAL REFERENCE

L-Bolt Technical Data

The supplied drawing provides one example size only (M16 × 2 pitch). A separate published catalogue lists a wider reference diameter range; the actual drawing and availability must be confirmed for each enquiry.

L-bolt reference data

Example dimensional data from supplied sheet

Catalogue reference range: M5 to M24

D	L	C	T	Bend angle (deg)
M16 x 2 pitch	172	67	70	90

Stainless steel mechanical properties (source table)

Grade	Tensile strength MPa (min.)	Yield strength MPa (min.)	Elongation in 50 mm gauge length (%)	Hardness BHN (max.)	Hardness RB (max.)
304	515	205	40	201	92
304L	485	170	40	201	92
316	515	205	40	217	95
316L	485	170	40	217	95
310S	515	205	40	217	95

Stainless steel chemical composition (%)

Grade	C (max.)	Mn (max.)	P (max.)	S (max.)	Si (max.)	Cr	Ni	Mo
304	0.080	2.00	0.045	0.030	0.75	18-20	8-10	—
304L	0.030	2.00	0.045	0.030	0.75	18-20	8-10	—
316	0.080	2.00	0.045	0.030	0.75	16-18	10-14	2.00-3.00
316L	0.030	2.00	0.045	0.030	0.75	16-18	10-14	2.00-3.00
310S	0.080	2.00	0.045	0.030	1.50	24-26	19-22	—

Dimensional tables are transcribed from the supplied BOLTS.pdf and technical sheets. Please share the required drawing or specification for any product-specific details.

Fasteners, Specifications & Related Components

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SPFL® Bolts | Hex, Allen, U, Flange & Stud Bolts

Flange Bolts

Carriage Bolts

Allen Cap Bolts

L, J & T Bolts

Dome-Head Bolts

Anti-Theft Bolts

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d	d₁	d₂	b to 125	b to 200
M5	12	5	16
M6	14	6	18
M8	18	8	22	28
M10	20	10	26	32
M12	25	12	30	36
M16	32	16	38	44
M20	40	18	46	52

d₁	l	b
M6	130	35
M8	140	40
M10	150	45
M12	170	55
M14	180	60
M16	190	65
M18	200	70
M20	210	75
M22	220	80
M24	230	85
M27	250	90
M30	270	105
M33	290	115
M36	310	125

d₁	b	e
M4	14	5
M5	16	6.5
M6	18	7.5
M7	20	9
M8	22	10
M10	26	12
M12	30	15
M14	34	18
M16	38	20
M18	42	22
M20	46	25
M22	50	28
M24	54	30
M27	60	35
M30	66	38
M33	72	42
M36	78	45
M39	84	50
M42	90	52
M45	96	58
M48	102	60
M52	110	65

d	d₁	d₂	b to 125	b to 200
M5	12	5	16
M6	14	6	18
M8	18	8	22	28
M10	20	10	26	32
M12	25	12	30	36
M16	32	16	38	44
M20	40	18	46	52

d₁	l	b
M6	130	35
M8	140	40
M10	150	45
M12	170	55
M14	180	60
M16	190	65
M18	200	70
M20	210	75
M22	220	80
M24	230	85
M27	250	90
M30	270	105
M33	290	115
M36	310	125

d₁	b	e
M4	14	5
M5	16	6.5
M6	18	7.5
M7	20	9
M8	22	10
M10	26	12
M12	30	15
M14	34	18
M16	38	20
M18	42	22
M20	46	25
M22	50	28
M24	54	30
M27	60	35
M30	66	38
M33	72	42
M36	78	45
M39	84	50
M42	90	52
M45	96	58
M48	102	60
M52	110	65

d	d₁	d₂	b to 125	b to 200
M5	12	5	16
M6	14	6	18
M8	18	8	22	28
M10	20	10	26	32
M12	25	12	30	36
M16	32	16	38	44
M20	40	18	46	52

d₁	l	b
M6	130	35
M8	140	40
M10	150	45
M12	170	55
M14	180	60
M16	190	65
M18	200	70
M20	210	75
M22	220	80
M24	230	85
M27	250	90
M30	270	105
M33	290	115
M36	310	125

d₁	b	e
M4	14	5
M5	16	6.5
M6	18	7.5
M7	20	9
M8	22	10
M10	26	12
M12	30	15
M14	34	18
M16	38	20
M18	42	22
M20	46	25
M22	50	28
M24	54	30
M27	60	35
M30	66	38
M33	72	42
M36	78	45
M39	84	50
M42	90	52
M45	96	58
M48	102	60
M52	110	65