HL Series 3 & 4 Bolt Galvanized Steel Tube Couplings

Stock Level

DESIGNED FOR USE IN INDUSTRIAL VACUUM AND DENSE OR DILUTE CONVEYING SYSTEMS

Product Image

Applications

Our Flagship Compression Coupling, the HL Series galvanized steel couplings are our most versatile coupling and are designed for use in both positive pressure and vacuum dilute or dense phase conveying systems. HL couplings have static pressure ratings ranging from 30 PSI to 160 PSI.

Standard Features

3 and 4 bolt configurations
Sizes: 1.50” up to 8.00” tubing
Galvanized steel construction
Zinc plated grade 8 bolts
Zinc plated grade 8 flange nuts (no washer needed)
White NBR FDA compliant or black SBR rubber gaskets
Available with stainless steel gasket protectors
Advanced “Eyelet” design improves conductivity
Lighter weight for ease of handling
Flanged nuts reduce installation time

Optional Features

Stainless steel gasket protectors
T304 stainless construction by special order
High temp silicon gaskets
Chemical resistant viton gaskets

Literature Downloads

Boss Process Compression Coupling Overview.pdf

Boss Process HL Compression Coupling Data Sheet.pdf

Size & Pricing Chart

* GP = Gasket Protector

Part Number	Size (OD)	Bolts	Gasket	GP	Units/Box	Price
50603-151310	1.50" OD	3	Black	No	Unit	$17.38
50603-151311	1.50" OD	3	Black	Yes	Unit	$20.70
50603-151320	1.50" OD	3	White	No	Unit	$18.96
50603-151321	1.50" OD	3	White	Yes	Unit	$22.27
50603-181310	1.75" OD	3	Black	No	Unit	$17.69
50603-181311	1.75" OD	3	Black	Yes	Unit	$21.00
50603-181320	1.75" OD	3	White	No	Unit	$22.12
50603-181321	1.75" OD	3	White	Yes	Unit	$21.74
50603-201310	2.00" OD	3	Black	No	Unit	$17.85
50603-201311	2.00" OD	3	Black	Yes	Unit	$21.32
50603-201320	2.00" OD	3	White	No	Unit	$19.59
50603-201321	2.00" OD	3	White	Yes	Unit	$23.07
50603-211310	2.125" OD	3	Black	No	Unit	$18.01
50603-211311	2.125" OD	3	Black	Yes	Unit	$21.48
50603-211320	2.125" OD	3	White	No	Unit	$19.75
50603-211321	2.125" OD	3	White	Yes	Unit	$23.22
50603-225310	2.25" OD	3	Black	No	Unit	$18.16
50603-225311	2.25" OD	3	Black	Yes	Unit	$20.73
50603-231310	2.375" OD	3	Black	No	Unit	$18.16
50603-231311	2.375" OD	3	Black	Yes	Unit	$21.64
50603-231320	2.375" OD	3	White	No	Unit	$19.91
50603-231321	2.375" OD	3	White	Yes	Unit	$23.38
50603-251310	2.50" OD	3	Black	No	Unit	$18.33
50603-251311	2.50" OD	3	Black	Yes	Unit	$21.79
50603-251320	2.50" OD	3	White	No	Unit	$20.23
50603-251321	2.50" OD	3	White	Yes	Unit	$23.69
50603-301310	3.00" OD	3	Black	No	Unit	$19.28
50603-301311	3.00" OD	3	Black	Yes	Unit	$22.90
50603-301320	3.00" OD	3	White	No	Unit	$21.79
50603-301321	3.00" OD	3	White	Yes	Unit	$25.44
50603-301410	3.00" OD	4	Black	No	Unit	$28.12
50603-301411	3.00" OD	4	Black	Yes	Unit	$31.75
50603-301420	3.00" OD	4	White	No	Unit	$30.02
50603-301421	3.00" OD	4	White	Yes	Unit	$33.65
50603-351311	3.50" OD	3	Black	Yes	Unit	$24.33
50603-351320	3.50" OD	3	White	No	Unit	$23.69
50603-351321	3.50" OD	3	White	Yes	Unit	$27.48
50603-351410	3.50" OD	4	Black	No	Unit	$30.02
50603-351411	3.50" OD	4	Black	Yes	Unit	$33.81
50603-351420	3.50" OD	4	White	No	Unit	$33.17
50603-351421	3.50" OD	4	White	Yes	Unit	$36.96
50603-401310	4.00" OD	3	Black	No	Unit	$22.12
50603-401311	3.00" OD	4	Black	Yes	Unit	$26.06
50603-401320	3.00" OD	4	White	No	Unit	$25.28
50603-401321	3.00" OD	4	White	Yes	Unit	$29.23
50603-401410	4.00" OD	4	Black	No	Unit	$33.17
50603-401411	4.00" OD	4	Black	Yes	Unit	$37.13
50603-401420	4.00" OD	4	White	No	Unit	$36.33
50603-401421	4.00" OD	4	White	Yes	Unit	$40.28
50603-501310	5.00" OD	3	Black	No	Unit	$28.43
50603-501311	5.00" OD	3	Black	Yes	Unit	$32.55
50603-501320	5.00" OD	3	White	No	Unit	$31.60
50603-501321	5.00" OD	3	White	Yes	Unit	$35.70
50603-501410	5.00" OD	4	Black	No	Unit	$44.23
50603-501411	6.00" OD	4	Black	Yes	Unit	$48.35
50603-501420	5.00" OD	4	White	No	Unit	$47.40
50603-501421	5.00" OD	4	White	Yes	Unit	$51.50
50603-601310	6.00" OD	3	White	No	Unit	$37.91
50603-601311	6.00" OD	3	Black	Yes	Unit	$42.34
50603-601320	6.00" OD	3	White	No	Unit	$41.07
50603-601321	6.00" OD	3	White	Yes	Unit	$45.50
50603-601410	6.00" OD	4	Black	No	Unit	$47.40
50603-601411	6.00" OD	4	Black	Yes	Unit	$51.81
50603-601421	6.00" OD	4	White	Yes	Unit	$54.98
50603-601420	6.00" OD	4	White	Yes	Unit	$50.55
50603-801310	8.00" OD	3	Black	No	Unit	$60.03
50603-801311	8.00" OD	3	Black	Yes	Unit	$64.92
50603-801320	8.00" OD	3	White	No	Unit	$63.18
50603-801321	8.00" OD	3	White	Yes	Unit	$68.09
50603-801410	8.00" OD	4	Black	No	Unit	$69.51
50603-801411	8.00" OD	4	Black	Yes	Unit	$74.40
50603-801420	8.00" OD	4	White	No	Unit	$72.67
50603-801421	8.00" OD	4	White	Yes	Unit	$77.56
50603-225320	2.25" OD	3	White	No	Unit	$19.91
50603-225321	2.25" OD	3	White	Yes	Unit	$22.46
50619-1503BN	1.50" OD	3	Black	No	Box(40 Units)	$621.82
50619-1506BY	1.50" OD	3	Black	Yes	Box(40 Units)	$740.82
50619-1503WN	1.50" OD	3	White	No	Box(40 Units)	$678.49
50619-1503WY	1.50" OD	3	White	Yes	Box(40 Units)	$797.11
50619-1753BN	1.75" OD	3	Black	No	Box(35 Units)	$554.01
50619-1753BY	1.75" OD	3	Black	Yes	Box(35 Units)	$657.81
50619-1753WN	1.75" OD	3	White	No	Box(35 Units)	$692.51
50619-2003BN	2.00" OD	3	Black	No	Box(30 Units)	$479.12
50619-2003BY	2.00" OD	3	Black	Yes	Box(30 Units)	$572.33
50619-2003WN	2.00" OD	3	White	No	Box(30 Units)	$525.87
50619-2003WY	2.00" OD	3	White	Yes	Box(30 Units)	$619.08
50619-21236BN	2.125" OD	3	Black	No	Box(30 Units)	$483.37
50619-2123BY	2.125" OD	3	Black	Yes	Box(30 Units)	$576.58
50619-2123WN	2.125" OD	3	White	No	Box(25 Units)	$530.12
50619-2123WY	2.125" OD	3	White	Yes	Box(25 Units)	$623.33
50619-2253BN	2.25" OD	3	Black	No	Box(25 Units)	$406.35
50619-2253BY	2.25" OD	3	Black	Yes	Box(25 Units)	$463.72
50619-2383BN	2.375" OD	3	Black	No	Box(25 Units)	$406.35
50619-2383BY	2.375" OD	3	Black	Yes	Box(25 Units)	$484.03
50619-2383WN	2.375" OD	3	White	No	Box(25 Units)	$445.31
50619-2383WY	2.375" OD	3	White	Yes	Box(25 Units)	$522.99
50619-2503BN	2.50" OD	3	Black	No	Box(25 Units)	$409.89
50619-2503BY	2.50" OD	3	Black	Yes	Box(25 Units)	$487.57
50619-2503WN	2.50" OD	3	White	No	Box(25 Units)	$452.39
50619-2503WY	2.50" OD	3	White	Yes	Box(25 Units)	$530.07
50619-3003BN	3.00" OD	3	Black	No	Box(20 Units)	$344.91
50619-3003BY	3.00" OD	3	Black	Yes	Box(20 Units)	$409.89
50619-3003WN	3.00" OD	3	White	No	Box(20 Units)	$390.06
50619-3003WY	3.00" OD	3	White	Yes	Box(6 Units)	$455.22
50619-3004BN	3.00" OD	4	Black	No	Box(20 Units)	$503.20
50619-3004BY	3.00" OD	4	Black	Yes	Box(20 Units)	$568.18
50619-3004WN	3.00" OD	4	White	No	Box(20 Units)	$537.20
50619-3004WY	3.00" OD	4	White	Yes	Box(20 Units)	$602.18
50619-3503BY	3.50" OD	3	Black	Yes	Box(15 Units)	$326.54
50619-3503WN	3.50" OD	3	White	No	Box(15 Units)	$318.04
50619-3503WY	3.50" OD	3	White	Yes	Box(15 Units)	$368.90
50619-3504BN	3.50" OD	4	Black	No	Box(15 Units)	$402.90
50619-3504BY	3.50" OD	4	Black	Yes	Box(15 Units)	$453.76
50619-3504WN	3.50" OD	4	White	No	Box(15 Units)	$445.26
50619-3504WY	3.50" OD	4	White	Yes	Box(15 Units)	$496.12
50619-4003BN	4.00" OD	3	Black	No	Box(12 Units)	$237.43
50619-4003BY	3.00" OD	4	Black	Yes	Box(12 Units)	$279.82
50619-4003WN	3.00" OD	4	White	No	Box(12 Units)	$271.43
50619-4003WY	3.00" OD	4	White	Yes	Box(12 Units)	$313.82
50619-4004BN	4.00" OD	4	Black	No	Box(12 Units)	$356.21
50619-4004BY	4.00" OD	4	Black	Yes	Box(12 Units)	$398.59
50619-4004WN	4.00" OD	4	White	No	Box(12 Units)	$390.09
50619-4004WY	4.00" OD	4	White	Yes	Box(12 Units)	$432.48
50619-5003BN	5.00" OD	3	Black	No	Box(8 Units)	$203.55
50619-5003BY	5.00" OD	3	Black	Yes	Box(8 Units)	$232.94
50619-5003WN	5.00" OD	3	White	No	Box(8 Units)	$226.14
50619-5003WY	5.00" OD	3	White	Yes	Box(8 Units)	$255.53
50619-5004BN	5.00" OD	4	Black	No	Box(8 Units)	$316.58
50619-5004BY	6.00" OD	4	Black	Yes	Box(8 Units)	$346.04
50619-5004WN	5.00" OD	4	White	No	Box(8 Units)	$339.24
50619-5004WY	5.00" OD	4	White	Yes	Box(8 Units)	$368.64
50619-6003BN	6.00" OD	3	White	No	Box(6 Units)	$203.55
50619-6003BY	6.00" OD	3	Black	Yes	Box(6 Units)	$227.29
50619-6003WN	6.00" OD	3	White	No	Box(6 Units)	$220.49
50619-6003WY	6.00" OD	3	White	Yes	Box(6 Units)	$244.23
50619-6004BN	6.00" OD	4	Black	No	Box(6 Units)	$254.43
50619-6004BY	6.00" OD	4	Black	Yes	Box(6 Units)	$278.18
50619-6004WY	6.00" OD	4	White	Yes	Box(6 Units)	$295.12
50619-6004WN	6.00" OD	4	White	Yes	Box(6 Units)	$271.38
50619-8003BN	8.00" OD	3	Black	No	Box(3 Units)	$161.13
50619-8003BY	8.00" OD	3	Black	Yes	Box(3 Units)	$174.28
50619-8003WN	8.00" OD	3	White	No	Box(3 Units)	$169.60
50619-8003WY	8.00" OD	3	White	Yes	Box(3 Units)	$182.75
50619-8004BN	8.00" OD	4	Black	No	Box(3 Units)	$186.58
50619-8004BY	8.00" OD	4	Black	Yes	Box(3 Units)	$199.72
50619-8004WN	8.00" OD	4	White	No	Box(3 Units)	$195.05
50619-8004WY	8.00" OD	4	White	Yes	Box(3 Units)	$208.19
50619-2253WN	2.25" OD	3	White	No	Box(25 Units)	$445.31
50619-2253WY	2.25" OD	3	White	Yes	Box(25 Units)	$502.44

ORDER NOW!

Type HL 3 & 4 Bolt Steel Couplings are sold Individually or in boxes of 3-40 units. See our Size and Pricing Chart to the left for individual unit and box pricing, along with box quantities and available options.

HL Series Compression Couplings are available with or without Gasket Protectors factory installed. Both styles are available to ship immediately.