Slotted Spring Pins

ISO 8752, ISO 13337, DIN 1481, DIN 7346, BS 7060

Slotted spring pins consist of a single coil of spring steel or stainless steel with an open slot sufficiently wide to enable the pin to reduce in diameter as it is driven into a hole of appropriate size.
The ends of the pin have a bevelled chamfer. They are designed for plain drilled holes but a countersink makes assembly easier, especially for the ISO 8752 type.
Slotted pins are normally supplied in the heavy duty form to ISO 8752, but a light duty version can be supplied to ISO 13337.

Slotted Spring Pins Standards

ISO 8752 ISO 13337 DIN 1481 DIN 7346 BS 7060

Increasing Shear Strength Of Spring Pins

It is possible to increase the shear strength of slotted pins by inserting a small diameter pin inside a large one. This should always be done by inserting the larger pin first, then inserting the smaller one, taking care that the slot is between 90° and 180° away from the slot in the larger pin.
Suitable combinations for pins to ISO 8752 standard are:

Outer Pin	Inner Pin
3.5mm	2.0mm
5.00mm	3.00mm
6.0mm	3.5mm
8.0mm	5.0mm
10.0mm	6.0mm
12.0mm	7.0mm

Lengths-from 4mm up to 180, depending on diameter. Ask for more information
Nominal Diameter, ISO 8752, mm		1.5	2	2.5	3	3.5	4	5	6	8
Expanded Diameter	Min	1.7	2.3	2.8	3.3	3.8	4.4	5.4	6.4	8.5
Expanded Diameter	Min	1.8	2.4	2.9	3.5	4	4.6	5.6	6.7	8.8
Recommended	Min	1.5	2	2.5	3	3.5	4	5	6	8
Hole Size (H12)	Max	1.6	2.1	2.6	3.1	3.62	4.12	5.12	6.12	8.15
Material Thickness		0.3	0.4	0.5	0.6	0.7	0.8	1	1.2	1.5
Minimum Double Shear Strengths-Tested to ISO 8749, kN
Spring Steel		1.58	2.82	4.38	6.32	9.06	11.24	17.54	26.04	42.76
Austenitic Stainless Steel		0.98	1.81	2.84	4.07	5.8	7.25	10.75	16.17	26.46
Standard diameters are shown above, but we are also able to quote, as specials in other diameters; 1, 4.5, 7, 11, 13, 15, 18, 22, 24, 25, 26, 28, 30, 32, 34, 36, 38, 40mm

Slotted Spring Pin Materials

Spring Steel
Austenitic Stainless Steel

Forging Specifications

ASTM A105 ASTM A1099 ASTM A181 ASTM A182 ASTM A266 ASTM A336 ASTM A350 ASTM A522 ASTM A541 ASTM A582 ASTM A592 ASTM A638 ASTM A694 ASTM A705 ASTM A707 ASTM A727 ASTM A836 ASTM A965 ASTM B124 ASTM B381 ASTM B462 ASTM B493 ASTM B564 ASTM B637 ASTM B865

Bar Stock Specifications

ASTM A108 ASTM A276 ASTM A29 ASTM A36 ASTM A479 ASTM A529 ASTM A564 ASTM A572 ASTM A576 ASTM B103 ASTM B121 ASTM B122 ASTM B134 ASTM B139 ASTM B150 ASTM B151 ASTM B16 ASTM B160 ASTM B164 ASTM B166 ASTM B169 ASTM B335 ASTM B348 ASTM B36 ASTM B365 ASTM B387 ASTM B408 ASTM B425 ASTM B446 ASTM B473 ASTM B550 ASTM B572 ASTM B574 ASTM B805 ASTM B927 ASTM B98 ASTM B99

Material

Material Grades

Carbon Steel 1018, 1020, 1040, 1045
Alloy Steel 4130, 4140, 4142, 4340, 6150, 8620
Chrome Moly Steel 25CRMO4, 21CRMOV5-7, 42CRMO4, 42CRMOV4-6
Austenitic Stainless Steel 301, 302, 303, 304, 316, 317, 321, 310, 309, 329, 347 & 348
Martensitic / Ferritic Stainless Steel 403, 405, 409, 410, 414, 416, 418, 420 & 430F
Super Austenitic Stainless Steel 904l, 254-Smo, 253Ma, Alloy 20, Sanicro Alloy 28, Al-6xn, 310Moln, Alloy 230, Alloy 330 , Alloy 333
Precipitation Hardening Stainless Steel Alloy A-286, A453 GRADE 660, 17-4 PH, 15-5 Ph , 15-7 Ph, 17-7 Ph

Nitronic 50 , 60 ( xm-19), 30, 32, 33, 40
Duplex 32205 (F60), 31803 (F51);Super Duplex 32750 ( F53) , 32760 (Zeron 100), (F55), 329, Ferralium 255, 255FG46
Inconel 600, 601, 602, 603, 617, 625, 686, 702, 713, 718, 725, 738, 740, 783, X-750, 701, 901, 939
Incoloy 800, 800H, 800HT, 825, 925, 926, 945
Hastelloy C276, C22,C-2000,C4,B, B2, B3, G30, X, N
Monel Alloy 400, K-500, R405
Nimonic Alloy 80A, 90, 105, 115, 263
Titanium Grade1, 2, 3, 4, 5, 6, 7,8, 9, 11, 12, 19,23
Nickel 200, 201
Copper Nickel 70/30, 90/10

Silicon Bronze C651, C655, C656
Cobalt Alloys Invar 36 / 42, Waspalloy, MP35N / 159, Stellite 3/6/12/21, Rene 41, L605
Molybdenum Grade 361/363/364/365
Durehete 900/950/1055, JETHETE X19/M152, Hiduron 130/190, Tantalum, Zircoloy, Aluminium Alloy 2024, 6061, 7075