HELICOIL Free Running Helical Inserts

Helicoil free running inserts are used to make threads or repair worn threads inside tapped holes and are suitable for offering reliable threading in metals, composites, wood & similar materials. These inserts are usually larger in diameter than tapped holes and are compressed while being inserted, thereby providing maximum surface contact area.

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Helicoil free running inserts are suitable for repairing stripped-out threads and providing stronger threads in soft materials, such as aluminium, magnesium and fibre-reinforced plastics. These...Read more

HELICOIL -

Free Running Helical Inserts

Style	Model	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Tensile Strength	Rockwell Hardness	Price (ex. VAT)
A	K327-8	ANPT	0.534"	304 Stainless Steel	Right Hand	1.02"	200000 to 250000 PSI	C43-C50	€81.82
A	K327-6	ANPT , Free Running	0.407"	304 Stainless Steel	Right Hand	0.816"	200000 to 250000 PSI	C43-C50	€57.57
A	K327-16	ANPT , Free Running	0.661"	304 Stainless Steel	Right Hand	1.558"	200000 to 250000 PSI	C43-C50	€66.66
A	K327-12	ANPT , Free Running	0.534"	304 Stainless Steel	Right Hand	1.247"	200000 to 250000 PSI	C43-C50	€122.14
B	R327-4	ANPT , Free Running	0.394"	304 Stainless Steel	Right Hand	0.668"	200000 to 250000 PSI	C43-C50	€92.45
B	R327-2	Free Running , NPT	0.273"	304 Stainless Steel	Right Hand	0.499"	200000 to 250000 PSI	C43-C50	€71.07
B	R1185-9	Free Running , UNC	0.844"	304 Stainless Steel	Right Hand	0.682"	200000 to 250000 PSI	C43-C50	€49.24
B	R1185-8	Free Running , UNC	0.75"	304 Stainless Steel	Right Hand	0.61"	200000 to 250000 PSI	C43-C50	€36.66
B	R1185-7	Free Running , UNC	0.656"	304 Stainless Steel	Right Hand	0.539"	200000 to 250000 PSI	C43-C50	€26.50
B	R1185-05	Free Running , UNC	0.188"	304 Stainless Steel	Right Hand	0.166"	200000 to 250000 PSI	C43-C50	€22.19
A	K1185-14	Free Running , UNC	1.312"	304 Stainless Steel	Right Hand	1.037"	200000 to 250000 PSI	C43-C50	€22.01
B	R1185-5	Free Running , UNC	0.469"	304 Stainless Steel	Right Hand	0.39"	200000 to 250000 PSI	C43-C50	€34.91
B	R1185-4	Free Running , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	200000 to 250000 PSI	C43-C50	€22.99
B	R1185-3	Free Running , UNC	0.285"	304 Stainless Steel	Right Hand	0.251"	200000 to 250000 PSI	C43-C50	€25.88
B	R1185-2	Free Running , UNC	0.246"	304 Stainless Steel	Right Hand	0.212"	200000 to 250000 PSI	C43-C50	€25.93
B	R1185-12	Free Running , UNC	1.125"	304 Stainless Steel	Right Hand	0.893"	200000 to 250000 PSI	C43-C50	€63.90
B	R1185-10	Free Running , UNC	0.938"	304 Stainless Steel	Right Hand	0.754"	200000 to 250000 PSI	C43-C50	€72.11
B	R1185-1	Free Running , UNC	0.324"	304 Stainless Steel	Right Hand	0.276"	200000 to 250000 PSI	C43-C50	€25.89
B	R1185-04	Free Running , UNC	0.168"	304 Stainless Steel	Right Hand	0.151"	200000 to 250000 PSI	C43-C50	€22.98
B	R1185-6	Free Running , UNC	0.562"	304 Stainless Steel	Right Hand	0.462"	200000 to 250000 PSI	C43-C50	€48.52
A	K1185-18	Free Running , UNC	1.688"	304 Stainless Steel	Right Hand	1.335"	200000 to 250000 PSI	C43-C50	€43.20
A	K1185-16	Free Running , UNC	1.5"	304 Stainless Steel	Right Hand	1.181"	200000 to 250000 PSI	C43-C50	€30.06
A	K1185-20	Free Running , UNC	1.875"	304 Stainless Steel	Right Hand	1.463"	200000 to 250000 PSI	C43-C50	€54.52
A	K1185-22	Free Running , UNC	2.062"	304 Stainless Steel	Right Hand	1.62"	200000 to 250000 PSI	C43-C50	€59.90
A	K1185-24	Free Running , UNC	2.25"	304 Stainless Steel	Right Hand	1.749"	200000 to 250000 PSI	C43-C50	€72.79

HELICOIL -

Tanged Free Running Inserts, UNC

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	A1185-8CN1000	1/2-13	33/64"	Metric Free Running , UNC	1"	304 Stainless Steel	Right Hand	0.61"	€275.29
A	A1185-8CN750	1/2-13	33/64"	Metric Free Running , UNC	0.75"	304 Stainless Steel	Right Hand	0.61"	€223.12
A	A1185-8CN500	1/2-13	33/64"	Metric Free Running , UNC	0.5"	304 Stainless Steel	Right Hand	0.61"	€165.95
A	A1185-4EN625	1/4-20	H	UNC	0.625"	Nitronic 60	Right Hand	0.32"	€201.25
A	A1185-4CN375	1/4-20	H	Metric Free Running , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€94.87
A	A1185-4CN500	1/4-20	H	Metric Free Running , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€111.02
A	A1185-4CN750	1/4-20	H	Metric Free Running , UNC	0.75"	304 Stainless Steel	Right Hand	0.32"	€134.66
A	A1185-4CNW375	1/4-20	H	Metric Free Running , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€124.99
A	A1185-4CNW500	1/4-20	H	Metric Free Running , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€109.32
A	1185-4CN500S	1/4-20	H	UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€603.68
A	A1185-4EN750	1/4-20	H	Metric Free Running , UNC	0.75"	Nitronic 60	Right Hand	0.32"	€219.47
A	1185-4CN250S	1/4-20	H	UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€1,280.56
A	1185-4CN375S	1/4-20	H	UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€1,252.16
A	A1185-4CN250	1/4-20	H	Metric Free Running , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€95.79
A	1185-02CNW172S	2-56	3/32"	UNC	0.172"	304 Stainless Steel	Right Hand	0.145"	€1,416.85
A	1185-02CN086S	2-56	3/32"	UNC	0.086"	304 Stainless Steel	Right Hand	0.145"	€1,061.59
A	1185-02CN172S	2-56	3/32"	UNC	0.172"	304 Stainless Steel	Right Hand	0.145"	€1,381.57
A	1185-02CNW129S	2-56	3/32"	UNC	0.129"	304 Stainless Steel	Right Hand	0.145"	€1,353.21
A	1185-02CN129S	2-56	3/32"	UNC	0.129"	304 Stainless Steel	Right Hand	0.145"	€1,198.14
A	A1185-02CNW172	2-56	3/32"	Metric Free Running , UNC	0.172"	304 Stainless Steel	Right Hand	0.115"	€94.23
A	A1185-02CNW129	2-56	3/32"	Metric Free Running , UNC	0.129"	304 Stainless Steel	Right Hand	0.115"	€109.77
A	A1185-02CN086	2-56	3/32"	Metric Free Running , UNC	0.086"	304 Stainless Steel	Right Hand	0.115"	€101.20
A	A1185-02CN129	2-56	3/32"	Metric Free Running , UNC	0.129"	304 Stainless Steel	Right Hand	0.115"	€97.55
A	A1185-02CN172	2-56	3/32"	Metric Free Running , UNC	0.172"	304 Stainless Steel	Right Hand	0.115"	€109.95
A	A1185-02CNW086	2-56	3/32"	Metric Free Running , UNC	0.086"	304 Stainless Steel	Right Hand	0.115"	€103.04

HELICOIL -

Tanged Free Running Inserts, UNF

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	A1191-4CN500	1/4-20	G	Metric Free Running , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€108.58
A	A1191-4CN250	1/4-20	6.7mm	Metric Free Running , UNF	0.25"	304 Stainless Steel	Right Hand	0.326"	€90.60
A	A1191-4CN375	1/4-20	G	Metric Free Running , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€108.28
A	A1191-4CNW500	1/4-20	G	Metric Free Running , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€133.24
A	A1191-4CNW375	1/4-20	G	Metric Free Running , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€145.99
A	A1191-4CNW250	1/4-20	G	Metric Free Running , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€87.24
A	1191-4CN250S	1/4-28	G	UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€1,283.20
A	1191-4CN375S	1/4-28	G	UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€964.79
A	1191-4CN500S	1/4-28	G	UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€606.63
A	1191-4CNW250S	1/4-28	G	UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€0.84
A	A1191-5CN625	5/16-18	21/64"	Metric Free Running , UNF	0.625"	304 Stainless Steel	Right Hand	0.39"	€149.62
A	A1191-5CN469	5/16-18	21/64"	Metric Free Running , UNF	0.469"	304 Stainless Steel	Right Hand	0.39"	€121.38
A	A1191-5CN312	5/16-18	21/64"	Metric Free Running , UNF	0.312"	304 Stainless Steel	Right Hand	0.39"	€111.34
A	A1191-5CN250	5/16-18	21/64"	Metric Free Running , UNF	0.25"	304 Stainless Steel	Right Hand	0.39"	€229.28
A	1191-5CN312S	5/16-24	21/64"	UNF	0.312"	304 Stainless Steel	Right Hand	0.39"	€606.63
A	1191-5CN469S	5/16-24	21/64"	UNF	0.469"	304 Stainless Steel	Right Hand	0.39"	€670.24
A	A1191-3EN475	10-24	#7	Metric Free Running , UNF	0.475"	Nitronic 60	Right Hand	0.246"	€201.25
A	A1191-3EN570	10-24	#7	Metric Free Running , UNF	0.57"	Nitronic 60	Right Hand	0.246"	€164.35
A	A1191-3CNW285	10-24	#7	Metric Free Running , UNF	0.285"	304 Stainless Steel	Right Hand	0.246"	€114.99
A	A1191-3EN380	10-24	#7	Metric Free Running , UNF	0.38"	Nitronic 60	Right Hand	0.246"	€185.23
A	A1191-3CNW570	10-24	#7	Metric Free Running , UNF	0.57"	304 Stainless Steel	Right Hand	0.246"	€150.07
A	A1191-3CNW380	10-24	#7	Metric Free Running , UNF	0.38"	304 Stainless Steel	Right Hand	0.246"	€119.30
A	A1191-3CNW190	10-24	#7	Metric Free Running , UNF	0.19"	304 Stainless Steel	Right Hand	0.246"	€86.54
A	A1191-3CN380	10-24	#7	Metric Free Running , UNF	0.38"	304 Stainless Steel	Right Hand	0.246"	€110.61
A	A1191-3CN285	10-24	#7	Metric Free Running , UNF	0.285"	304 Stainless Steel	Right Hand	0.246"	€98.82

HELICOIL -

Tanged Free Running Inserts, Metric Coarse

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	A1084-2CNW020	M2 x 0.4	2.1mm	Metric Coarse , Metric Free Running	2mm	304 Stainless Steel	Right Hand	2.6mm	€169.58
A	A1084-2CN050	M2 x 0.4	2.1mm	Metric Coarse , Metric Free Running	5mm	304 Stainless Steel	Right Hand	2.6mm	€184.85
A	A1084-2CN060	M2 x 0.4	2.1mm	Metric Coarse , Metric Free Running	6mm	304 Stainless Steel	Right Hand	2.6mm	€264.26
A	A1084-2.2CN066	M2.2 x 0.45	2.3mm	Metric Coarse , Metric Free Running	6.6mm	304 Stainless Steel	Right Hand	2.9mm	€130.94
A	A1084-2.2CN044	M2.2 x 0.45	2.3mm	Metric Coarse , Metric Free Running	4.4mm	304 Stainless Steel	Right Hand	2.9mm	€109.55
A	1084-2.5CN025S	M2.5 x 0.45	#37	Metric Coarse	2.5mm	304 Stainless Steel	Right Hand	3.457mm	€3,136.51
A	A1084-2.5CN075	M2.5 x 0.45	2.55mm	Metric Coarse , Metric Free Running	7.5mm	304 Stainless Steel	Right Hand	3.45mm	€126.17
A	A1084-2.5CN063	M2.5 x 0.45	2.55mm	Metric Coarse , Metric Free Running	6.3mm	304 Stainless Steel	Right Hand	3.45mm	€115.71
A	A1084-2.5CN050	M2.5 x 0.45	2.55mm	Metric Coarse , Metric Free Running	5mm	304 Stainless Steel	Right Hand	3.45mm	€87.71
A	A1084-2.5CN038	M2.5 x 0.45	2.55mm	Metric Coarse , Metric Free Running	3.8mm	304 Stainless Steel	Right Hand	3.45mm	€99.68
A	A1084-2.5CN025	M2.5 x 0.45	2.55mm	Metric Coarse , Metric Free Running	2.5mm	304 Stainless Steel	Right Hand	3.45mm	€66.29
A	A1084-2.5CNW050	M2.5 x 0.45	#37	Metric Coarse , Metric Free Running	5mm	304 Stainless Steel	Right Hand	3.45mm	€115.48
A	A1084-2.5EN025	M2.5 x 0.45	2.55mm	Metric Coarse , Metric Free Running	2.5mm	Nitronic 60	Right Hand	3.45mm	€154.89
A	A1084-2.5EN038	M2.5 x 0.45	2.55mm	Metric Coarse , Metric Free Running	3.8mm	Nitronic 60	Right Hand	3.45mm	€164.88
A	A1084-2.5EN050	M2.5 x 0.45	2.55mm	Metric Coarse , Metric Free Running	5mm	Nitronic 60	Right Hand	3.45mm	€175.62
A	A1084-2.5CNW025	M2.5 x 0.45	#37	Metric Coarse , Metric Free Running	2.5mm	304 Stainless Steel	Right Hand	3.45mm	€103.04
A	A1084-2.5CNW038	M2.5 x 0.45	#37	Metric Coarse , Metric Free Running	3.8mm	304 Stainless Steel	Right Hand	3.45mm	€109.55
A	1084-2.5CN038S	M2.5 x 0.45	#37	Metric Coarse	3.8mm	304 Stainless Steel	Right Hand	3.45mm	€1,145.35
A	1084-2.5CNW038S	M2.5 x 0.45	#37	Metric Coarse	3.8mm	304 Stainless Steel	Right Hand	3.45mm	€1,353.21
A	1084-2.5CN050S	M2.5 x 0.45	#37	Metric Coarse	5mm	304 Stainless Steel	Right Hand	3.45mm	€1,283.50
A	A1084-3CN045	M3 x 0.5	3.15mm	Metric Coarse , Metric Free Running	4.5mm	304 Stainless Steel	Right Hand	4.075mm	€118.49
A	A1084-3CN060	M3 x 0.5	3.15mm	Metric Coarse , Metric Free Running	6mm	304 Stainless Steel	Right Hand	4.075mm	€103.85
A	A1084-3CN075	M3 x 0.5	3.15mm	Metric Coarse , Metric Free Running	7.5mm	304 Stainless Steel	Right Hand	4.075mm	€149.85
A	A1084-3CN090	M3 x 0.5	3.15mm	Metric Coarse , Metric Free Running	9mm	304 Stainless Steel	Right Hand	4.075mm	€209.99
A	A1084-3CNW030	M3 x 0.5	3.15mm	Metric Coarse , Metric Free Running	3mm	304 Stainless Steel	Right Hand	4.075mm	€156.20

HELICOIL -

Tangless Free Running Inserts

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	T1185-4C500S	1/4-20	H	UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€759.36
A	AT1185-4C250	1/4-20	H	Metric Free Running , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€85.04
A	T1185-4C375S	1/4-20	H	UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€2,392.97
A	T1185-4C250S	1/4-20	H	UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€2,331.49
A	AT1185-4C500	1/4-20	H	Metric Free Running , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€87.92
A	AT1185-4C375	1/4-20	H	Metric Free Running , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€91.83
A	T1185-02C172S	2-56	3/32"	UNC	0.172"	304 Stainless Steel	Right Hand	0.145"	€767.81
A	T1185-02C129S	2-56	3/32"	UNC	0.129"	304 Stainless Steel	Right Hand	0.145"	€729.60
A	AT1185-02C129	2-56	3/32"	Metric Free Running , UNC	0.129"	304 Stainless Steel	Right Hand	0.115"	€69.59
A	AT1185-02C086	2-56	3/32"	Metric Free Running , UNC	0.086"	304 Stainless Steel	Right Hand	0.115"	€71.08
A	T1185-02C086S	2-56	3/32"	UNC	0.086"	304 Stainless Steel	Right Hand	0.145"	€691.42
A	AT1185-02C172	2-56	3/32"	Metric Free Running , UNC	0.172"	304 Stainless Steel	Right Hand	0.115"	€105.57
A	AT1185-04C224	4-40	#31	Metric Free Running , UNC	0.224"	304 Stainless Steel	Right Hand	0.152"	€84.91
A	AT1185-04C112	4-40	#31	Metric Free Running , UNC	0.112"	304 Stainless Steel	Right Hand	0.152"	€87.02
A	T1185-04C168S	4-40	#31	UNC	0.168"	304 Stainless Steel	Right Hand	0.151"	€774.58
A	T1185-04C112S	4-40	#31	UNC	0.112"	304 Stainless Steel	Right Hand	0.151"	€734.04
A	AT1185-04C168	4-40	#31	Metric Free Running , UNC	0.168"	304 Stainless Steel	Right Hand	0.152"	€81.24
A	T1185-04C224S	4-40	#31	UNC	0.224"	304 Stainless Steel	Right Hand	0.151"	€815.12
A	AT1185-06C138	6-32	#26	Metric Free Running , UNC	0.138"	304 Stainless Steel	Right Hand	0.186"	€73.59
A	T1185-06C276S	6-32	#26	UNC	0.276"	304 Stainless Steel	Right Hand	0.185"	€815.12
A	AT1185-06C276	6-32	#26	Metric Free Running , UNC	0.276"	304 Stainless Steel	Right Hand	0.186"	€88.31
A	AT1185-06C207	6-32	#26	Metric Free Running , UNC	0.207"	304 Stainless Steel	Right Hand	0.186"	€96.20
A	T1185-06C138S	6-32	#26	UNC	0.138"	304 Stainless Steel	Right Hand	0.185"	€691.42
A	T1185-06C207S	6-32	#26	UNC	0.207"	304 Stainless Steel	Right Hand	0.185"	€701.56
A	T1185-2C328S	8-32	#17	UNC	0.328"	304 Stainless Steel	Right Hand	0.212"	€824.14

HELICOIL -

Tangless Free Running Inserts, Fine

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	AT1191-4C375	1/4-28	#7	Metric Free Running , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€101.11
A	T1191-4C375S	1/4-28	G	UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€856.55
A	AT1191-4C250	1/4-28	#7	Metric Free Running , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€99.09
A	AT1191-4C500	1/4-28	#7	Metric Free Running , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€120.78
A	T1191-4C250S	1/4-28	G	UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€922.01
A	T1191-4C500S	1/4-28	G	UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€759.36
A	AT1191-3C380	10-32	#7	Metric Free Running , UNF	0.38"	304 Stainless Steel	Right Hand	0.246"	€100.71
A	T1191-3C190S	10-32	#7	UNF	0.19"	304 Stainless Steel	Right Hand	0.246"	€3,399.78
A	T1191-3C380S	10-32	#7	UNF	0.38"	304 Stainless Steel	Right Hand	0.246"	€2,689.99
A	AT1191-3C190	10-32	#7	Metric Free Running , UNF	0.19"	304 Stainless Steel	Right Hand	0.246"	€86.47
A	AT1191-3C285	10-32	#7	Metric Free Running , UNF	0.285"	304 Stainless Steel	Right Hand	0.246"	€81.26
A	T1191-3C285S	10-32	#7	UNF	0.285"	304 Stainless Steel	Right Hand	0.246"	€2,479.38

Features

Free running inserts maintain a tight seal, making them suitable for gear housing, drills, printing presses and machinery that produces continuous vibration.
They are produced in standard sizes for Metric, UNC & UNF thread forms.
Chrislynn free running inserts include non-locking helical inserts that can be used to repair tapped holes.
They are available in lengths ranging from 1.688 to 4.5 inches.
Thread reinforcement with helical inserts prevents threaded hole wear (even after repeated use), increasing integrity and extending lifespan.
These flexible inserts are designed such that each coil in the helical insert can adjust to the fastener threads independently. Since the load is evenly distributed, there is more surface contact between the coil and the parent materials, resulting in a strong & reliable seal.
These coil inserts reduce stress and fatigue while maximising thread strength.

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Free Running Helical Inserts

Tanged Free Running Inserts, UNC

Tanged Free Running Inserts, UNF

Tanged Free Running Inserts, Metric Coarse

Tangless Free Running Inserts

Tangless Free Running Inserts, Fine

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Free Running Helical Inserts

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Tanged Free Running Inserts, UNF

Tanged Free Running Inserts, Metric Coarse

Tangless Free Running Inserts

Tangless Free Running Inserts, Fine

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