HELICOIL Locking Helical Inserts

Helicoil locking helical inserts are installed into printing presses, gear housing & exhaust systems to create an internal screw thread for installing fasteners in automotive manufacturing & maintenance applications. They have a screw locking design to avoid screw loosening upon installation.

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HELICOIL -

Tanged Screw Locking Inserts, Coarse

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	3585-20CN1250	1 1/4-7	1 19/64"	Screw Locking , UNC	1.25"	304 Stainless Steel	Right Hand	1.463"	€33.94
A	3585-18CN1688	1 1/8-7	1 11/64"	Screw Locking , UNC	1.688"	304 Stainless Steel	Right Hand	1.335"	€34.81
A	3585-18CN1125	1 1/8-7	1 11/64"	Screw Locking , UNC	1.125"	304 Stainless Steel	Right Hand	1.335"	€23.53
A	3585-16CN1000	1-8	1 1/32"	Screw Locking , UNC	1"	304 Stainless Steel	Right Hand	1.181"	€18.15
A	3585-16CN1500	1-8	1 1/32"	Screw Locking , UNC	1.5"	304 Stainless Steel	Right Hand	1.181"	€23.30
A	3585-4CN375S	1/4-20	H	Screw Locking , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€1,638.45
A	A3585-4CN250	1/4-20	H	Screw Locking , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€160.41
A	3585-4CNW500S	1/4-20	H	Screw Locking , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€842.97
A	3585-4CN250S	1/4-20	H	Screw Locking , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€1,581.98
A	3585-4CN500S	1/4-20	H	Screw Locking , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€1,043.78
A	A3585-4CN375	1/4-20	H	Screw Locking , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€172.45
A	3585-4CNW250S	1/4-20	H	Screw Locking , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€1,822.10
A	A3585-4CN500	1/4-20	H	Screw Locking , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€199.37
A	A3585-4CNW250	1/4-20	H	Screw Locking , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€180.26
A	A3585-4CNW375	1/4-20	H	Screw Locking , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€165.52
A	A3585-4CNW500	1/4-20	H	Screw Locking , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€210.09
A	A3585-4EN250	1/4-20	H	Screw Locking , UNC	0.25"	Nitronic 60	Right Hand	0.32"	€272.65
A	A3585-4EN375	1/4-20	H	Screw Locking , UNC	0.375"	Nitronic 60	Right Hand	0.32"	€205.89
A	A3585-4EN500	1/4-20	H	Screw Locking , UNC	0.5"	Nitronic 60	Right Hand	0.32"	€301.88
A	A3585-4EN750	1/4-20	H	Screw Locking , UNC	0.75"	Nitronic 60	Right Hand	0.32"	€382.74
A	3585-4CNW375S	1/4-20	H	Screw Locking , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€1,873.88
A	3585-02CN086S	2-56	3/32"	Screw Locking , UNC	0.086"	304 Stainless Steel	Right Hand	0.145"	€1,581.98
A	A3585-02CN086	2-56	3/32"	Screw Locking , UNC	0.086"	304 Stainless Steel	Right Hand	0.115"	€160.41
A	A3585-02CN129	2-56	3/32"	Screw Locking , UNC	0.129"	304 Stainless Steel	Right Hand	0.115"	€170.98
A	A3585-02CN172	2-56	3/32"	Screw Locking , UNC	0.172"	304 Stainless Steel	Right Hand	0.115"	€192.64

HELICOIL -

Tanged Screw Locking Inserts, Fine

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	A3591-24CN2250	1 1/2-12	1 33/64"	Screw Locking , UNF	2.25"	304 Stainless Steel	Right Hand	1.727"	€3,993.41
A	A3591-20CN1875	1 1/4-12	1 17/64"	Screw Locking , UNF	1.875"	304 Stainless Steel	Right Hand	1.454"	€2,953.53
A	A3591-20CN1250	1 1/4-12	1 17/64"	Screw Locking , UNF	1.25"	304 Stainless Steel	Right Hand	1.454"	€2,419.78
A	A3591-18CN1688	1 1/8-12	1 9/64"	Screw Locking , UNF	1.688"	304 Stainless Steel	Right Hand	1.319"	€2,641.18
A	A3591-18CN1125	1 1/8-12	1 9/64"	Screw Locking , UNF	1.125"	304 Stainless Steel	Right Hand	1.319"	€2,696.83
A	3591-161CN1000	1-12	1 1/64"	Screw Locking , UNF	1"	304 Stainless Steel	Right Hand	1.184"	€17.30
A	3591-161CN1500	1-12	1 1/64"	Screw Locking , UNF	1.5"	304 Stainless Steel	Right Hand	1.184"	€22.42
A	3591-16CN1500	1-14	1 1/64"	Screw Locking , UNF	1.5"	304 Stainless Steel	Right Hand	1.171"	€22.73
A	3591-4CNW375S	1/4-28	G	Screw Locking , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€1,873.88
A	A3591-4EN500	1/4-28	G	Screw Locking , UNF	0.5"	Nitronic 60	Right Hand	0.316"	€303.49
A	A3591-4EN375	1/4-28	G	Screw Locking , UNF	0.375"	Nitronic 60	Right Hand	0.316"	€302.91
A	A3591-4CN250	1/4-28	G	Screw Locking , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€172.90
A	A3591-4EN250	1/4-28	G	Screw Locking , UNF	0.25"	Nitronic 60	Right Hand	0.316"	€262.47
A	3591-4CNW500S	1/4-28	G	Screw Locking , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€988.73
A	A3591-4CN313	1/4-28	G	Screw Locking , UNF	0.313"	304 Stainless Steel	Right Hand	0.316"	€382.95
A	3591-4CNW250S	1/4-28	G	Screw Locking , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€1,822.10
A	3591-4CN375S	1/4-28	G	Screw Locking , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€1,739.44
A	3591-4CN250S	1/4-28	G	Screw Locking , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€1,394.56
A	A3591-4CNW500	1/4-28	G	Screw Locking , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€213.53
A	A3591-4CNW375	1/4-28	G	Screw Locking , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€168.98
A	A3591-4CNW250	1/4-28	G	Screw Locking , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€185.99
A	A3591-4CNW187	1/4-28	G	Screw Locking , UNF	0.187"	304 Stainless Steel	Right Hand	0.316"	€399.97
A	A3591-4CN500	1/4-28	G	Screw Locking , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€180.69
A	A3591-4CN375	1/4-28	G	Screw Locking , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€189.01
A	3591-4CN500S	1/4-28	G	Screw Locking , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€885.15

HELICOIL -

Tanged Screw Locking Inserts, Metric Coarse

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	A4184-2.5CN025	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	2.5mm	304 Stainless Steel	Right Hand	3.45mm	€145.85
A	A4184-2.5CN038	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	3.8mm	304 Stainless Steel	Right Hand	3.45mm	€172.33
A	4184-2.5CNW050S	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	5mm	304 Stainless Steel	Right Hand	3.45mm	€1,901.43
A	4184-2.5CNW038S	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	3.8mm	304 Stainless Steel	Right Hand	3.45mm	€1,793.85
A	4184-2.5CNW025S	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	2.5mm	304 Stainless Steel	Right Hand	3.45mm	€1,751.45
A	4184-2.5CN050S	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	5mm	304 Stainless Steel	Right Hand	3.45mm	€1,829.43
A	4184-2.5CN038S	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	3.8mm	304 Stainless Steel	Right Hand	3.45mm	€1,739.44
A	4184-2.5CN025S	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	2.5mm	304 Stainless Steel	Right Hand	3.45mm	€1,679.46
A	A4184-2.5CNW050	M2.5 x 0.45	#37	Metric Coarse , Screw Locking	5mm	304 Stainless Steel	Right Hand	3.45mm	€179.83
A	A4184-2.5CNW038	M2.5 x 0.45	#37	Metric Coarse , Screw Locking	3.8mm	304 Stainless Steel	Right Hand	3.45mm	€177.24
A	A4184-2.5CNW063	M2.5 x 0.45	#37	Metric Coarse , Screw Locking	6.3mm	304 Stainless Steel	Right Hand	3.45mm	€204.16
A	A4184-2.5CN075	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	7.5mm	304 Stainless Steel	Right Hand	3.45mm	€211.76
A	A4184-2.5CN050	M2.5 x 0.45	2.55mm	Metric Coarse , Screw Locking	5mm	304 Stainless Steel	Right Hand	3.45mm	€179.73
A	4184-3CN060S	M3 x 0.5	1/8"	Metric Coarse , Screw Locking	6mm	304 Stainless Steel	Right Hand	4.075mm	€1,829.43
A	4184-3CNW030S	M3 x 0.5	1/8"	Metric Coarse , Screw Locking	3mm	304 Stainless Steel	Right Hand	4.075mm	€1,878.79
A	4184-3CNW045S	M3 x 0.5	1/8"	Metric Coarse , Screw Locking	4.5mm	304 Stainless Steel	Right Hand	4.075mm	€1,793.85
A	A4184-3EN060	M3 x 0.5	3.15mm	Metric Coarse , Screw Locking	6mm	Nitronic 60	Right Hand	4.075mm	€552.30
A	4184-3CN045S	M3 x 0.5	1/8"	Metric Coarse , Screw Locking	4.5mm	304 Stainless Steel	Right Hand	4.075mm	€1,739.44
A	4184-3CNW060S	M3 x 0.5	1/8"	Metric Coarse , Screw Locking	6mm	304 Stainless Steel	Right Hand	4.075mm	€1,873.88
A	A4184-3CN030	M3 x 0.5	3.15mm	Metric Coarse , Screw Locking	3mm	304 Stainless Steel	Right Hand	4.075mm	€164.56
A	A4184-3CN045	M3 x 0.5	3.15mm	Metric Coarse , Screw Locking	4.5mm	304 Stainless Steel	Right Hand	4.075mm	€180.98
A	A4184-3CN060	M3 x 0.5	3.15mm	Metric Coarse , Screw Locking	6mm	304 Stainless Steel	Right Hand	4.075mm	€192.64
A	A4184-3CN075	M3 x 0.5	3.15mm	Metric Coarse , Screw Locking	7.5mm	304 Stainless Steel	Right Hand	4.075mm	€151.12
A	A4184-3CN090	M3 x 0.5	3.15mm	Metric Coarse , Screw Locking	9mm	304 Stainless Steel	Right Hand	4.075mm	€226.98
A	4184-3CN030S	M3 x 0.5	1/8"	Metric Coarse , Screw Locking	3mm	304 Stainless Steel	Right Hand	4.075mm	€1,679.46

HELICOIL -

Tangless Screw Locking Inserts, Coarse

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	T3585-4C500S	1/4-20	G	Screw Locking , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€1,138.16
A	T3585-4C375S	1/4-20	G	Screw Locking , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€1,092.02
A	T3585-4C250S	1/4-20	G	Screw Locking , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€1,040.76
A	AT3585-4CW500	1/4-20	G	Screw Locking , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€170.26
A	AT3585-4CW375	1/4-20	G	Screw Locking , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€173.18
A	AT3585-4CW250	1/4-20	G	Screw Locking , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€158.60
A	AT3585-4C500	1/4-20	G	Screw Locking , UNC	0.5"	304 Stainless Steel	Right Hand	0.32"	€134.27
A	AT3585-4C375	1/4-20	G	Screw Locking , UNC	0.375"	304 Stainless Steel	Right Hand	0.32"	€134.94
A	AT3585-4C250	1/4-20	G	Screw Locking , UNC	0.25"	304 Stainless Steel	Right Hand	0.32"	€122.43
A	AT3585-02C129	2-56	3/32"	Screw Locking , UNC	0.129"	304 Stainless Steel	Right Hand	0.115"	€120.23
A	T3585-02C172S	2-56	3/32"	Screw Locking , UNC	0.172"	304 Stainless Steel	Right Hand	0.145"	€1,040.50
A	T3585-02C129S	2-56	3/32"	Screw Locking , UNC	0.129"	304 Stainless Steel	Right Hand	0.145"	€988.73
A	AT3585-02C086	2-56	3/32"	Screw Locking , UNC	0.086"	304 Stainless Steel	Right Hand	0.115"	€115.61
A	AT3585-02CW129	2-56	3/32"	Screw Locking , UNC	0.129"	304 Stainless Steel	Right Hand	0.115"	€164.94
A	AT3585-02C172	2-56	3/32"	Screw Locking , UNC	0.172"	304 Stainless Steel	Right Hand	0.115"	€127.40
A	AT3585-02CW086	2-56	3/32"	Screw Locking , UNC	0.086"	304 Stainless Steel	Right Hand	0.115"	€171.28
A	AT3585-02CW172	2-56	3/32"	Screw Locking , UNC	0.172"	304 Stainless Steel	Right Hand	0.115"	€168.21
A	AT3585-04C168	4-40	#31	Screw Locking , UNC	0.168"	304 Stainless Steel	Right Hand	0.152"	€121.33
A	AT3585-04CW112	4-40	#31	Screw Locking , UNC	0.112"	304 Stainless Steel	Right Hand	0.152"	€151.62
A	AT3585-04C224	4-40	#31	Screw Locking , UNC	0.224"	304 Stainless Steel	Right Hand	0.152"	€129.71
A	AT3585-04C112	4-40	#31	Screw Locking , UNC	0.112"	304 Stainless Steel	Right Hand	0.152"	€115.61
A	T3585-04C168S	4-40	#31	Screw Locking , UNC	0.168"	304 Stainless Steel	Right Hand	0.151"	€1,308.84
A	T3585-04C112S	4-40	#31	Screw Locking , UNC	0.112"	304 Stainless Steel	Right Hand	0.151"	€1,064.66
A	AT3585-04CW168	4-40	#31	Screw Locking , UNC	0.168"	304 Stainless Steel	Right Hand	0.152"	€137.13
A	T3585-04C224S	4-40	#31	Screw Locking , UNC	0.224"	304 Stainless Steel	Right Hand	0.151"	€1,204.60

HELICOIL -

Tangless Screw Locking Inserts, Fine

Style	Model	Thread Size	Drill Size	Thread Type	Insert Length	Material	Thread Direction	Free Coil Dia.	Price (ex. VAT)
A	T3591-4C500S	1/4-28	G	Screw Locking , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€846.83
A	AT3591-4C500	1/4-28	G	Screw Locking , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€155.41
A	T3591-4C375S	1/4-28	G	Screw Locking , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€1,145.38
A	T3591-4C250S	1/4-28	G	Screw Locking , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€772.16
A	AT3591-4CW500	1/4-28	G	Screw Locking , UNF	0.5"	304 Stainless Steel	Right Hand	0.316"	€167.66
A	AT3591-4CW375	1/4-28	G	Screw Locking , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€156.63
A	AT3591-4CW250	1/4-28	G	Screw Locking , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€150.01
A	AT3591-4C375	1/4-28	G	Screw Locking , UNF	0.375"	304 Stainless Steel	Right Hand	0.316"	€152.60
A	AT3591-4C250	1/4-28	G	Screw Locking , UNF	0.25"	304 Stainless Steel	Right Hand	0.316"	€145.60
A	AT3591-3C380	10-32	#7	Screw Locking , UNF	0.38"	304 Stainless Steel	Right Hand	0.246"	€138.44
A	AT3591-3CW380	10-32	#7	Screw Locking , UNF	0.38"	304 Stainless Steel	Right Hand	0.246"	€159.38
A	T3591-3C190S	10-32	#7	Screw Locking , UNF	0.19"	304 Stainless Steel	Right Hand	0.246"	€1,074.65
A	T3591-3C285S	10-32	#7	Screw Locking , UNF	0.285"	304 Stainless Steel	Right Hand	0.246"	€968.81
A	T3591-3C380S	10-32	#7	Screw Locking , UNF	0.38"	304 Stainless Steel	Right Hand	0.246"	€1,059.37
A	AT3591-3CW285	10-32	#7	Screw Locking , UNF	0.285"	304 Stainless Steel	Right Hand	0.246"	€151.67
A	AT3591-3CW190	10-32	#7	Screw Locking , UNF	0.19"	304 Stainless Steel	Right Hand	0.246"	€154.43
A	AT3591-3C285	10-32	#7	Screw Locking , UNF	0.285"	304 Stainless Steel	Right Hand	0.246"	€133.48

Features

Locking helical inserts positively secure threaded fasteners using resilient internal locking threads.
These internal locking threads use self-locking torque to grip the fastener.
They have a tang / prong at the end of their body for ease of installation.
Precision Series Chrislynn locking inserts have stainless steel construction and generally conform to aerospace or military specifications.
Raptor Supplies also offers Chrislynn Precision Series 8-pitch locking inserts that have a pitch size of 8 threads per inch of insert.
Chrislynn rock solid internal locking inserts are of key locking type (positive mechanical locks) and have solid, one-piece construction with 2 or 4 locking keys for higher holding strength as compared to other inserts.
Heli-Coil locking inserts are mostly of tanged screw-locking variant and have a series of chords on the insert coils.
Their resilient screw-lock allows regular removal & reassembly of the fastener, without any major loss of torque.
Selected Heli-Coil locking inserts are tangless for eliminating the requirement of tang removal.

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Tanged Screw Locking Inserts, Coarse

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Tanged Screw Locking Inserts, Coarse

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