BOSS COUPLINGS AND CLAMPS

Purpose

The purpose of the Boss Coupling and Clamp System is to supply a convenient threaded fitting needed to connect two lengths of hose, or a single length to a male or female threaded (NPT) outlet on any type of equipment. The spud part of the coupling serves as one half of the connection and is usually fixed permanently to the equipment. The stem and nut attached (clamped) to the hose is the other half. The two halves are connected by rotating the wing nut on the spud, to achieve a mechanical as well as a pressure seal.

Services

The Boss Coupling and Clamp System is designed as an all purpose system, universally recommended for steam connections. They are also widely used with equal efficiency for high or low pressure air, water, liquid petroleum gas, fluid petroleum products, chemicals, potable fluids and almost any other type of fluid or gas. (Consult Columbia Rubber & Gasket for specific media capabilities.) They can be applied to all types of rubber, synthetic, plastic, metallic (with special stems) or semi-metallic hose.

EZ-Boss Ground Joint Seal

EZ-Boss non-metallic polymer seat is not subject to corrosion and offers resistance to chemicals and steam found in manufacturing facilities. A precisely machined recess holds the seat firmly in place, allowing it to absorb harsh punishment. Recommend for steam service up to 450慚; easy to seal; works with existing Boss Ground Joint Stems.

EZ-Boss Female Coupling

-	Coupling with Female Spud	Stem	Wing Nut	Female Spud	Male Spud	Double Spud
Sizes	Part #	Part #	Part #	Part #	Part #	Part #
1/4" *	GF1	GBA	BA2	GBC	-	-
3/8" *	GF3	GCA	CB	GCC	GMC	-
1/2"	GF6	GB1	B2	GB3	GM3	GDB3
3/4"	GF26	GB6	B12	GB8	GM8	GDB13
1"	GF36	GB11	B12	GB13	GM13	GDB13
1-1/4"	GF51	GB16	B17	GB18	GM18	GDB23
1-1/2"	GF61	GB21	B17	GB23	GM23	GDB23
2"	GF81	GB26	B27	GB28	GM28	GDB28
2-1/2"	GF96	GB31	B32	GB33	GM33	GDB33
3"	GF111	GB36	B37	GB38	GM38	GDB38
4"	GF141	GB46	B47	GB48	-	-
6" *	GF201	GB66	B67	GB68	-	-

*Note: 1/4", 3/8" & 6" come only with copper seat spuds. Note: These couplings are also available in red brass and stainless steel.

Boss Washer Seal

-	Coupling with Female Spud	Stem	Wing Nut	Female Spud	Male Spud	Double Spud	Washer*
Sizes	Part #	Part #	Part #	Part #	Part #	Part #	Part #
3/8"	WF3	CA	CB	CC	WMC	-	WBC
1/2"	WF6	B1	B2	B3	WM3	DB3	W2
3/4"	WF26	B6	B12	B8	WM8	DB13	W12
1"	WF36	B11	B12	B13	WM13	DB13	W12
1-1/4"	WF51	B16	B17	B18	WM18	DB23	W17
1-1/2"	WF61	B21	B17	B23	WM23	DB23	W17
2"	WF81	B26	B27	B28	WM28	DB28	W27
2-1/2"	WF96	B31	B32	B33	WM33	DB33	W32
3"	WF111	B36	B37	B38	WM38	DB38	W37
4"	WF141	B46	B47	B48	-	-	W47
6"	WF201	B66	B67	B68	-	-	W67

*Note: Washer is a Klinger Kevlar reinforced, Nitrile bonded material

Boss Male Stem

Steel Bar Stock		Malleable Iron		316 Stainless Steel		Brass
Hose x NPT Size	Part #	Size	Part #	Size	Part #	Size	Part #
1/4" x 1/8"	MS4X2	-	-	1/2"	RMS1	-	-
1/4" x 1/4"	MSA	-	-	3/4"	RMS6	3/4"	BMS6
1/4" x 3/8"	MSB	-	-	1"	RMS11	1"	BMS11
3/8" x 1/4"	MS6X4	1-1/4"	MS16	1-1/4"	RMS16	1-1/4"	BMS16
3/8" x 3/8"	MSC	1-1/2"	MS21	1-1/2"	RMS21	1-1/2"	BMS21
3/8" x 1/2"	MS6X8	2"	MS26	2"	RMS26	2"	BMS26
1/2" x 1/4"	MS8X4	2-1/2"	MS31	2-1/2"	RMS31	-	-
1/2" x 3/8"	MS8X6	3"	MS36	3"	RMS36	3"	BMS36
1/2" x 1/2"	MS1	4"	MS46	-	-	-	-
1/2" x 3/4"	MS8X12	-	-	-	-	-	-
3/4" x 1/2"	MS12X8	-	-	-	-	-	-
3/4" x 3/4"	MS6	-	-	-	-	-	-
3/4" x 1"	MS12X16	-	-	-	-	-	-
1" x 3/4"	MS16X12	-	-	-	-	-	-
1" x 1"	MS11	-	-	-	-	-	-

LP-Boss Male Stem

Non-porous tubular steel for volatile materials

**Boss Male Stem**
Plated, Male NPT End
Size	Part #
1-1/4"	LP16
1-1/2"	LP21
2"	LP26
2-1/2"	LP31
3"	LP36
4"	LP46
6"	LP66
Unplated, Beveled End
2"	LPB26
3"	LPB36

Boss Hose Mender

Collars to engage grip fingers of Boss Clamps

**Boss Hose Mender**
Size	Part #
1/2"	M1
3/4"	M6
1"	M11
1-1/4"	M16
1-1/2"	M21
2"	M26
2-1/2"	M31
3"	M36
4"	M46
6"	M66

Boss Bolt-On Clamps

The bolts used in the Boss interlocking clamps are not standard bolts. They vary from standard bolts in length versus diameter, thread length and material hardness. These bolts can be retorqued, but it is not recommended that they be reused, as they are designed for a single bend only. We recommend using only factory supplied replacement bolts

**2-Bolt Type Boss Clamps**
Hose ID	Hose OD		Plated Malleable Iron	Stainless Steel		Brass
Size	FromE#DH>	To:	Part #	Part #	Torque**	Part #	Torque**
1/4"	9/16"	21/32"	BD	-	6	-	-
3/8"	11/16"	7/8"	CD	-	6	-	-
1/2"	13/16"	15/16"	DD	-	6	-	-
1/2"	15/16"	1-1/16"	B4	RB4	12	BB4	10
1/2"	1-1/16"	1-3/16"	B5	-	12	-	-
3/4"	1-5/32"	1-9/32"	BU9S	-	21	-	-
3/4"	1-3/16"	1-5/16"	BU9	RBU9	21	BBU9	18
3/4"	1-5/16"	1-1/2"	B9	RB9	21	BB9	18
3/4"	1-1/2"	1-11/16"	B10	-	21	-	-

**4-Bolt Type Boss Clamps**
Hose ID	Hose OD		Plated Malleable Iron	Stainless Steel		Brass
Size	From:	To:	Part #	Part #	Torque**	Part #	Torque**
1/2"	29/32"	1-1/32"	968	-	6	-	-
1"	1-13/32"	1-9/16"	156*	-	21	-	-
1"	1-17/32"	1-23/32"	BU14	RBU14	21	BBU14	18
1"	1-11/16"	1-15/16"	B14	RB14	21	BB14	18
1"	1-15/16"	2-1/8"	B15	-	21	-	-
1-1/4"	1-1/2"	1-25/32"	BU18	-	40	-	-
1-1/4"	1-11/16"	1-7/8"	187*	-	21	-	-
1-1/4"	1-25/32"	2-3/32"	BU19	-	40	-	-
1-1/4"	1-7/8"	2-1/16"	206*	-	21	-	-
1-1/4"	2-1/8"	2-3/8"	B19	RB19	40	BB19	28
1-1/2"	1-13/16"	2"	BU22	-	40	-	-
1-1/2"	2"	2-7/32"	B22	-	40	-	-
1-1/2"	2"	2-1/8"	212*	-	21	-	-
1-1/2"	2-1/16"	2-1/4"	225*	-	40	-	-
1-1/2"	2-3/16"	2-3/8"	BU24	RBU24	40	BBU24	28
1-1/2"	2-3/8"	2-9/16"	B24	RB24	40	BB24	28
1-1/2"	2-9/16"	2-3/4"	B25	-	40	-	-
2"	2-1/4"	2-1/2"	250*	-	40	-	-
2"	2-11/32"	2-17/32"	BU28	-	60	-	-
2"	2-1/2"	2-3/4"	275*	-	40	-	-
2"	2-1/2"	2-25/32"	BU29	RBU29	60	BBU29	40
2"	2-3/4"	3-1/16"	B29	RB29	60	BB29	40
2"	2-3/4"	3-1/16"	306*	-	60	-	-
2"	3-3/32"	3-7/16"	B30	-	60	-	-
2-1/2"	3-1/16"	3-1/2"	350*	-	60	-	-
2-1/2"	3-3/32"	3-7/16"	BU34	-	60	-	-
2-1/2"	3-1/2"	3-15/16"	B34	-	150	-	-
3"	3-1/2"	3-3/4"	375*	-	60	-	-
3"	3-1/2"	3-15/16"	BU35	-	150	-	-
3"	3-3/4"	4"	401*	-	150	-	-
3"	3-13/16"	4-1/16"	B35	-	150	-	-
3"	4"	4-3/16"	418*	-	200	-	-
3"	4-1/16"	4-7/16"	B39	-	200	-	-
3"	4-3/16"	4-1/2"	450*	-	200	-	-

*Note: Starred clamps have four gripping fingers; all others have two.

**6-Bolt Type Boss Clamps**
Hose ID	Hose OD		Plated Malleable Iron
Size	From:	To:	Part #	Torque**
3"	4-1/4"	4-13/16"	BS39	150
4"	4-5/8"	5"	B45	150
4"	4-7/8"	5-1/4"	BS49	200
4"	5-1/4"	5-19/32"	BU49	200
4"	5-17/32"	5-15/16"	B49	200
6"	6-7/8"	7-3/8"	750	200
6"	7-1/2"	8"	850	200

**Note: Recommended torque rating in Ft.-Lbs.