Mounting Fixings – Mouser United Kingdom

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Molded-In Inserts

SI (Standard Inserts) Molded-In Inserts are installed during the molding process, and the inserts are located in the mold cavity by core pins. The core pins are withdrawn when the mold is opened, leaving the inserts permanently encapsulated in the plastic section with only the threads exposed. Inserts installed during the molding process avoid the need for additional procedures or installation equipment. The molded-in inserts include blind threaded inserts (IBA/IBB/IBC), self-locking blind threaded inserts (ILBC), through threaded inserts ( ITA/ITB/ITC), and knurled inserts (STKA/STKB/STKC). Typical applications include electronics (wearables, smartphones, and hand-held devices), automotive, aerospace and defense, medical, transportation, industrial, and recreational equipment.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Type	Material	Length	Outside Diameter	Thread Size
Mounting Fixings INTERNAL-THRD SPACR KNRL BRASS STKB-M3-8 SI 1: £0.39 2,800In Stock	Mfr. Part No. STKB-M3-8 Mouser Part No 153-STKB-M3-8	SI	Mounting Fixings INTERNAL-THRD SPACR KNRL BRASS Learn More about SI molded in inserts	Datasheet	2,800In Stock	£0.39 £0.281 £0.224 £0.202 View £0.188 £0.182 £0.172 £0.168 £0.163	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	8 mm	4.74 mm	M3
Mounting Fixings MOLD-IN INSERT, BLIND, BRASS IBB-440-6 SI 1: £0.33 230In Stock	Mfr. Part No. IBB-440-6 Mouser Part No 153-IBB-440-6	SI	Mounting Fixings MOLD-IN INSERT, BLIND, BRASS Learn More about SI molded in inserts	Datasheet	230In Stock	£0.33 £0.238 £0.19 £0.172 View £0.16 £0.155 £0.147 £0.143 £0.138	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	0.281 in	0.188 in	4-40
Mounting Fixings MOLD-IN INSERT, BLIND, BRASS IBB-M4-8 SI 1: £0.436 424In Stock	Mfr. Part No. IBB-M4-8 Mouser Part No 153-IBB-M4-8	SI	Mounting Fixings MOLD-IN INSERT, BLIND, BRASS Learn More about SI molded in inserts	Datasheet	424In Stock	£0.436 £0.31 £0.249 £0.223 View £0.207 £0.202 £0.19 £0.186 £0.18	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	10.31 mm	6.35 mm	M4
Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS IBC-440-6 SI 1: £0.661 477In Stock	Mfr. Part No. IBC-440-6 Mouser Part No 153-IBC-440-6	SI	Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS Learn More about SI molded in inserts	Datasheet	477In Stock	£0.661 £0.473 £0.378 £0.34 View £0.317 £0.308 £0.291 £0.284 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.281 in	0.188 in	4-40
Mounting Fixings MOLD-IN INSERT, BLIND, BRASS IBB-440-4 SI 1: £0.285 710In Stock	Mfr. Part No. IBB-440-4 Mouser Part No 153-IBB-440-4	SI	Mounting Fixings MOLD-IN INSERT, BLIND, BRASS Learn More about SI molded in inserts	Datasheet	710In Stock	£0.285 £0.197 £0.158 £0.149 View £0.126 £0.12 £0.118 £0.114	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	0.205 in	0.188 in	4-40
Mounting Fixings MOLD-IN INSERT, BRASS ITB-632 SI 1: £0.383 197In Stock	Mfr. Part No. ITB-632 Mouser Part No 153-ITB-632	SI	Mounting Fixings MOLD-IN INSERT, BRASS Learn More about SI molded in inserts	Datasheet	197In Stock	£0.383 £0.269 £0.216 £0.203 View £0.172 £0.164 £0.161 £0.155	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	0.219 in	0.219 in	6-32
Mounting Fixings INTERNAL-THRD SPACR KNRL BRASS STKB-M4-8 SI 1: £0.503 783In Stock	Mfr. Part No. STKB-M4-8 Mouser Part No 153-STKB-M4-8	SI	Mounting Fixings INTERNAL-THRD SPACR KNRL BRASS Learn More about SI molded in inserts	Datasheet	783In Stock	£0.503 £0.356 £0.285 £0.268 View £0.228 £0.217 £0.213 £0.206	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	8 mm	6.35 mm	M4
Mounting Fixings SPACER, KNURLED, STAINLESS STKC-440-4 SI 1: £0.615 999In Stock	Mfr. Part No. STKC-440-4 Mouser Part No 153-STKC-440-4	SI	Mounting Fixings SPACER, KNURLED, STAINLESS Learn More about SI molded in inserts	Datasheet	999In Stock	£0.615 £0.437 £0.35 £0.329 View £0.279 £0.267 £0.261 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.125 in	0.188 in	4-40
Mounting Fixings MOLD-IN INSERT, BLIND, BRASS IBB-832-12 SI 1: £0.526 8In Stock	Mfr. Part No. IBB-832-12 Mouser Part No 153-IBB-832-12	SI	Mounting Fixings MOLD-IN INSERT, BLIND, BRASS Learn More about SI molded in inserts	Datasheet	8In Stock	£0.526 £0.371 £0.297 £0.279 View £0.237 £0.227 £0.223 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	0.531 in	0.25 in	8-32
Mounting Fixings MOLD-IN INSERT, BLIND, BRASS IBB-M5-4 SI 1: £0.496 843In Stock	Mfr. Part No. IBB-M5-4 Mouser Part No 153-IBB-M5-4	SI	Mounting Fixings MOLD-IN INSERT, BLIND, BRASS Learn More about SI molded in inserts	Datasheet	843In Stock	£0.496 £0.352 £0.282 £0.265 View £0.225 £0.216 £0.211 £0.203	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	7.13 mm	7.14 mm	M5
Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS IBC-0420-4 SI 1: £0.856 303In Stock	Mfr. Part No. IBC-0420-4 Mouser Part No 153-IBC-0420-4	SI	Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS Learn More about SI molded in inserts	Datasheet	303In Stock	£0.856 £0.642 £0.50 £0.471 View £0.461 £0.445 £0.43 £0.416 £0.409	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.344 in	0.344 in	1/4-20
Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS IBC-M3-4 SI 1: £0.653 1,900In Stock	Mfr. Part No. IBC-M3-4 Mouser Part No 153-IBC-M3-4	SI	Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS Learn More about SI molded in inserts	Datasheet	1,900In Stock	£0.653 £0.461 £0.368 £0.347 View £0.294 £0.282 £0.276 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	5.21 mm	4.78 mm	M3
Mounting Fixings INTERNAL-THRD SPACR KNRL ALUM STKA-M3-3 SI 1: £0.203 719In Stock	Mfr. Part No. STKA-M3-3 Mouser Part No 153-STKA-M3-3	SI	Mounting Fixings INTERNAL-THRD SPACR KNRL ALUM Learn More about SI molded in inserts	Datasheet	719In Stock	£0.203 £0.144 £0.115 £0.109 View £0.092 £0.088 £0.086 £0.083	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	3 mm	4.74 mm	M3
Mounting Fixings INTERNAL-THRD SPACR KNRL BRASS STKB-832-8 SI 1: £0.54 6,606In Stock	Mfr. Part No. STKB-832-8 Mouser Part No 153-STKB-832-8	SI	Mounting Fixings INTERNAL-THRD SPACR KNRL BRASS Learn More about SI molded in inserts	Datasheet	6,606In Stock	£0.54 £0.381 £0.305 £0.275 View £0.255 £0.247 £0.233 £0.228 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	0.25 in	0.25 in	8-32
Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS IBC-632-8 SI 1: £0.668 9,908In Stock	Mfr. Part No. IBC-632-8 Mouser Part No 153-IBC-632-8	SI	Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS Learn More about SI molded in inserts	Datasheet	9,908In Stock	£0.668 £0.495 £0.385 £0.363 View £0.355 £0.343 £0.331 £0.32 £0.314	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.406 in	0.219 in	6-32
Mounting Fixings ASSEMBLY,LOCKING, ONE PIECE IBLC-632-8 SI 1: £2.29 4,378In Stock	Mfr. Part No. IBLC-632-8 Mouser Part No 153-IBLC-632-8	SI	Mounting Fixings ASSEMBLY,LOCKING, ONE PIECE Learn More about SI molded in inserts	Datasheet	4,378In Stock	£2.29 £1.71 £1.34 £1.26 View £1.23 £1.19 £1.14 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.406 in	0.219 in	6-32
Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS IBC-M3-12 SI 1: £0.759 8,820In Stock	Mfr. Part No. IBC-M3-12 Mouser Part No 153-IBC-M3-12	SI	Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS Learn More about SI molded in inserts	Datasheet	8,820In Stock	£0.759 £0.561 £0.437 £0.412 View £0.402 £0.388 £0.375 £0.362 £0.357	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	11.13 mm	4.78 mm	M3
Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS IBC-440-8 SI 1: £0.661 8,512In Stock 610On Order	Mfr. Part No. IBC-440-8 Mouser Part No 153-IBC-440-8	SI	Mounting Fixings MOLD-IN INSERT,BLIND,STAINLESS Learn More about SI molded in inserts	Datasheet	8,512In Stock 610On Order	£0.661 £0.467 £0.374 £0.352 View £0.299 £0.286 £0.28 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.344 in	0.188 in	4-40
Mounting Fixings MOLD-IN INSERT, ALUM ITA-M5 SI 1: £0.33 10,000In Stock	Mfr. Part No. ITA-M5 Mouser Part No 153-ITA-M5	SI	Mounting Fixings MOLD-IN INSERT, ALUM Learn More about SI molded in inserts	Datasheet	10,000In Stock	£0.33 £0.231 £0.185 £0.167 View £0.153 £0.15 £0.141 £0.138 £0.134	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	7.13 mm	7.13 mm	M5
Mounting Fixings INTERNAL-THRD SPACR KBRL BRASS STKB-M3-3 SI 1: £0.465 19,865In Stock	Mfr. Part No. STKB-M3-3 Mouser Part No 153-STKB-M3-3	SI	Mounting Fixings INTERNAL-THRD SPACR KBRL BRASS Learn More about SI molded in inserts	Datasheet	19,865In Stock	£0.465 £0.329 £0.264 £0.237 View £0.22 £0.214 £0.201 £0.196 £0.19	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	3 mm	4.74 mm	M3
Mounting Fixings MOLD-IN INSERT, STAINLESS ITC-M10 SI 1: £1.82 1,011In Stock	Mfr. Part No. ITC-M10 Mouser Part No 153-ITC-M10	SI	Mounting Fixings MOLD-IN INSERT, STAINLESS Learn More about SI molded in inserts	Datasheet	1,011In Stock	£1.82 £1.36 £1.06 £0.995 View £0.969 £0.943 £0.908 £0.871 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	14.27 mm	12.7 mm	M10
Mounting Fixings MOLD-IN INSERT, BLIND, BRASS IBB-0518-8 SI 1: £1.40 998In Stock	Mfr. Part No. IBB-0518-8 Mouser Part No 153-IBB-0518-8	SI	Mounting Fixings MOLD-IN INSERT, BLIND, BRASS Learn More about SI molded in inserts	Datasheet	998In Stock	£1.40 £1.05 £0.818 £0.759 View £0.748 £0.723 £0.698 £0.673 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	0.719 in	0.438 in	5/16-18
Mounting Fixings MOLD-IN INSERT, BLIND, BRASS IBB-440-10 SI 1: £0.428 5,343In Stock	Mfr. Part No. IBB-440-10 Mouser Part No 153-IBB-440-10	SI	Mounting Fixings MOLD-IN INSERT, BLIND, BRASS Learn More about SI molded in inserts	Datasheet	5,343In Stock	£0.428 £0.299 £0.239 £0.216 View £0.20 £0.194 £0.183 £0.179 £0.173	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	0.406 in	0.188 in	4-40
Mounting Fixings MOLD-IN INSERT, STAINLESS ITC-M4 SI 1: £0.653 3In Stock	Mfr. Part No. ITC-M4 Mouser Part No 153-ITC-M4	SI	Mounting Fixings MOLD-IN INSERT, STAINLESS Learn More about SI molded in inserts	Datasheet	3In Stock	£0.653 £0.466 £0.373 £0.336 View £0.313 £0.303 £0.286 £0.28 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	6.35 mm	6.35 mm	M4
Mounting Fixings INTERNAL-THRD SPACR KNRL BRASS STKB-M3-4 SI 1: £0.353 9,800In Stock	Mfr. Part No. STKB-M3-4 Mouser Part No 153-STKB-M3-4	SI	Mounting Fixings INTERNAL-THRD SPACR KNRL BRASS Learn More about SI molded in inserts	Datasheet	9,800In Stock	£0.353 £0.255 £0.203 £0.183 View £0.17 £0.165 £0.156 £0.153 £0.148	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Leaded Brass	4 mm	4.74 mm	M3