Dimensions LF, ISO Flanges, Fittings and Definition
The ISO large flange standard is known as LF, LFB, MF or sometimes just ISO flange. A larger version of the KF (QF) flanges, the flanges are joined by a centering ring with an elastomeric o-ring seal. ISO stainless steel vacuum fittings are for tube sizes ranging from 2-1/2″ through 24″ diameters. ISO design is ideally suited for applications requiring rapid and frequent assembly and disassembly.
Parts are helium leak tested to 1 x10-10 cc/sec for quality assurance.
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| Image | Name | Product Code | Price | Stock | Buy | hf:categories |
|---|---|---|---|---|---|---|
 | CENTER RING, ISO 63, VITON, ALUM., RETAINER | MKISO63CRAR | $20.30 | In stock | alum-centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
 | CLAMP, DOUBLE CLAW, ISO 63/100, ALUM., M8 X 45 | MKISO63100DCPM | $6.25 | In stock | single-and-double-claw-clamp iso-flanges-and-fittings | |
 | CROSS, EQUAL, 4-WAY, ISO 63, 304 SS | MKISO634X | $287.90 | In stock | 4way-cross iso-flanges-and-fittings | |
 | CROSS, RED., 4-WAY, ISO 80 X ISO 63, 304 SS | MKISO80634X | $350.90 | Available on backorder | 4-way-cross-reducing-2 iso-flanges-and-fittings | |
 | ELBOW, 45D, ISO 63, 304 SS | MKISO63E45 | $171.07 | In stock | 45d-elbow iso-flanges-and-fittings | |
 | ELBOW, 90D, ISO 63, 304 SS | MKISO63E90 | $162.89 | In stock | 90d-elbow-2 iso-flanges-and-fittings | |
 | ELBOW, 90D, ISO 63, MITERED, 304 SS | MKISO63E90M | $155.31 | In stock | 90d-elbow-mitered iso-flanges-and-fittings | |
 | Flange Vacuum, Blank, LF, ISO 63, Aluminum | MKISO63BA | $31.21 | In stock | alum-blank-flange iso-flanges-and-fittings | |
 | FLANGE, BORED, BOLTED, ISO 63, 2.5", 304 SS | MKISO6325BFH | $59.81 | In stock | bored-flange-bolted iso-flanges-and-fittings | |
 | Flange, Vacuum, Blank Bolted, LF, ISO 63, 304 SST | MKISO63BH | $61.97 | In stock | blank-flange-bolted iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 63, 304 SST | MKISO63B | $43.18 | In stock | blank-flange iso-flanges-and-fittings | |
 | ISO 63, SS Center Ring, Viton, Alum Retainer | MKISO63CRR | $33.50 | In stock | centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
 | NIPPLE, FULL, ISO 63, 304 SS | MKISO63FN | $140.16 | In stock | full-nipple iso-flanges-and-fittings | |
 | NIPPLE, HALF, ISO 63, 304 SS | MKISO63HN | $77.04 | In stock | half-nipple iso-flanges-and-fittings | |
 | NIPPLE, HALF, ISO 63, BOLTED, 304 SS | MKISO63HNH | $99.25 | In stock | half-nipple-bolted iso-flanges-and-fittings | |
 | REDUCER, CONICAL, ISO 80 X ISO 63, 304 SS | MKISO8063RC | $174.25 | In stock | conical-reducer-2 iso-flanges-and-fittings | |
 | REDUCER, ST., ISO 80 X ISO 63, 304 SS | MKISO8063R | $162.89 | In stock | straight-reducer iso-flanges-and-fittings | |
 | TEE, EQUAL, ISO 63, 304 SS | MKISO63T | $204.56 | In stock | equal-tee-2 iso-flanges-and-fittings | |
 | TEE, RED., ISO 80 X ISO 63, 304 SS | MKISO8063TR | $235.26 | In stock | reducer-tee iso-flanges-and-fittings | |
| CENTER RING, ISO 80, VITON, ALUM., RETAINER | MKISO80CRAR | $24.24 | In stock | alum-centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| CLAMP, DOUBLE CLAW, ISO 160/250, ALUM., M10 X 45 | MKISO160250DCPM | $5.95 | In stock | single-and-double-claw-clamp iso-flanges-and-fittings | |
| CROSS, EQUAL, 4-WAY, ISO 80, 304 SS | MKISO804X | $422.75 | In stock | 4way-cross iso-flanges-and-fittings | |
| CROSS, RED., 4-WAY, ISO 100 X ISO 63, 304 SS | MKISO100634X | $506.75 | Available on backorder | 4-way-cross-reducing-2 iso-flanges-and-fittings | |
| ELBOW, 45D, ISO 80, 304 SS | MKISO80E45 | $200.77 | In stock | 45d-elbow iso-flanges-and-fittings | |
| ELBOW, 90D, ISO 80, 304 SS | MKISO80E90 | $200.77 | In stock | 90d-elbow-2 iso-flanges-and-fittings | |
| ELBOW, 90D, ISO 80, MITERED, 304 SS | MKISO80E90M | $226.53 | In stock | 90d-elbow-mitered iso-flanges-and-fittings | |
| Flange Vacuum, Blank, LF, ISO 80, Aluminum | MKISO80BA | $40.91 | In stock | alum-blank-flange iso-flanges-and-fittings | |
| FLANGE, BORED, BOLTED, ISO 80, 3.0", 304 SS | MKISO8030BFH | $78.16 | In stock | bored-flange-bolted iso-flanges-and-fittings | |
| Flange, Vacuum, Blank Bolted, LF, ISO 80, 304 SST | MKISO80BH | $83.34 | In stock | blank-flange-bolted iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 63, 316 SST | MKISO63B316 | $79.68 | Available on backorder | 316-ss-iso-blank-flanges blank-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| ISO 80, SS Center Ring, Viton, Alum Retainer | MKISO80CRR | $43.18 | In stock | centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| NIPPLE, FULL, ISO 80, 304 SS | MKISO80FN | $166.68 | In stock | full-nipple iso-flanges-and-fittings | |
| NIPPLE, HALF, ISO 80, 304 SS | MKISO80HN | $84.46 | In stock | half-nipple iso-flanges-and-fittings | |
| NIPPLE, HALF, ISO 80, BOLTED, 304 SS | MKISO80HNH | $123.61 | In stock | half-nipple-bolted iso-flanges-and-fittings | |
| REDUCER, CONICAL, ISO 100 X ISO 63, 304 SS | MKISO10063RC | $185.62 | In stock | conical-reducer-2 iso-flanges-and-fittings | |
| REDUCER, ST., ISO 100 X ISO 63, 304 SS | MKISO10063R | $185.62 | In stock | straight-reducer iso-flanges-and-fittings | |
| TEE, EQUAL, ISO 80, 304 SS | MKISO80T | $306.84 | In stock | equal-tee-2 iso-flanges-and-fittings | |
| TEE, RED., ISO 100 X ISO 63, 304 SS | MKISO10063TR | $252.81 | In stock | reducer-tee iso-flanges-and-fittings | |
| CENTER RING, ISO 100, VITON, ALUM., RETAINER | MKISO100CRAR | $25.76 | In stock | alum-centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| CLAMP, DOUBLE CLAW, ISO 320/500, ALUM., M12 X 55 | MKISO320500DCPM | $12.25 | In stock | single-and-double-claw-clamp iso-flanges-and-fittings | |
| CROSS, EQUAL, 4-WAY, ISO 100, 304 SS | MKISO1004X | $453.44 | In stock | 4way-cross iso-flanges-and-fittings | |
| CROSS, RED., 4-WAY, ISO 100 X ISO 80, 304 SS | MKISO100804X | $463.35 | Available on backorder | 4-way-cross-reducing-2 iso-flanges-and-fittings | |
| ELBOW, 45D, ISO 100, 304 SS | MKISO100E45 | $227.29 | In stock | 45d-elbow iso-flanges-and-fittings | |
| ELBOW, 90D, ISO 100, 304 SS | MKISO100E90 | $212.14 | In stock | 90d-elbow-2 iso-flanges-and-fittings | |
| ELBOW, 90D, ISO 100, MITERED, 304 SS | MKISO100E90M | $208.35 | In stock | 90d-elbow-mitered iso-flanges-and-fittings | |
| Flange Vacuum, Blank, LF, ISO 100, Aluminum | MKISO100BA | $46.97 | In stock | alum-blank-flange iso-flanges-and-fittings | |
| FLANGE, BORED, BOLTED, ISO 100, 4.0", 304 SS | MKISO10040BFH | $108.11 | In stock | bored-flange-bolted iso-flanges-and-fittings | |
 | FLANGE, BORED, ISO 63, 2.5", 304 SS | MKISO6325BF | $43.18 | In stock | bored-flange iso-flanges-and-fittings | |
| Flange, Vacuum, Blank Bolted, LF, ISO 100, 304 SST | MKISO100BH | $99.25 | In stock | blank-flange-bolted iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 80, 304 SST | MKISO80B | $56.82 | In stock | blank-flange iso-flanges-and-fittings | |
| ISO 100, SS Center Ring, Viton, Alum Retainer | MKISO100CRR | $47.85 | In stock | centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| NIPPLE, FULL, ISO 100, 304 SS | MKISO100FN | $193.19 | In stock | full-nipple iso-flanges-and-fittings | |
| NIPPLE, HALF, ISO 100, 304 SS | MKISO100HN | $96.73 | In stock | half-nipple iso-flanges-and-fittings | |
| NIPPLE, HALF, ISO 100, BOLTED, 304 SS | MKISO100HNH | $135.58 | In stock | half-nipple-bolted iso-flanges-and-fittings | |
| REDUCER, CONICAL, ISO 100 X ISO 80, 304 SS | MKISO10080RC | $193.19 | In stock | conical-reducer-2 iso-flanges-and-fittings | |
| REDUCER, ST., ISO 100 X ISO 80, 304 SS | MKISO10080R | $223.50 | In stock | straight-reducer iso-flanges-and-fittings | |
| TEE, EQUAL, ISO 100, 304 SS | MKISO100T | $297.75 | In stock | equal-tee-2 iso-flanges-and-fittings | |
| TEE, RED., ISO 100 X ISO 80, 304 SS | MKISO10080TR | $273.50 | In stock | reducer-tee iso-flanges-and-fittings | |
| CENTER RING, ISO 160, VITON, ALUM., RETAINER | MKISO160CRAR | $30.46 | In stock | alum-centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
 | CLAMP, SINGLE CLAW, ISO 63/100, ALUM., M8 X 35 | MKISO63100SCPM | $5.25 | In stock | single-and-double-claw-clamp iso-flanges-and-fittings | |
| CROSS, EQUAL, 4-WAY, ISO 160, 304 SS | MKISO1604X | $871.27 | In stock | 4way-cross iso-flanges-and-fittings | |
| CROSS, RED., 4-WAY, ISO 160 X ISO 63, 304 SS | MKISO160634X | $523.16 | Available on backorder | 4-way-cross-reducing-2 iso-flanges-and-fittings | |
| ELBOW, 90D, ISO 160, MITERED, 304 SS | MKISO160E90M | $371.24 | In stock | 90d-elbow-mitered iso-flanges-and-fittings | |
| Flange Vacuum, Blank, LF, ISO 160, Aluminum | MKISO160BA | $78.04 | In stock | alum-blank-flange iso-flanges-and-fittings | |
| FLANGE, BORED, BOLTED, ISO 160, 6.0", 304 SS | MKISO16060BFH | $154.72 | In stock | bored-flange-bolted iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 63, 2.5", 316 SS | MKISO6325BF316 | $75.45 | In stock | 316-ss-iso-bored-flanges bored-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| Flange, Vacuum, Blank Bolted, LF, ISO 160, 304 SST | MKISO160BH | $179.78 | In stock | blank-flange-bolted iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 80, 316 SST | MKISO80B316 | $111.27 | In stock | 316-ss-iso-blank-flanges blank-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| ISO 160, SS Center Ring, Viton, Alum Retainer | MKISO160CRR | $54.23 | In stock | centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| NIPPLE, FULL, ISO 160, 304 SS | MKISO160FN | $268.96 | In stock | full-nipple iso-flanges-and-fittings | |
| NIPPLE, HALF, ISO 160, 304 SS | MKISO160HN | $152.90 | In stock | half-nipple iso-flanges-and-fittings | |
| NIPPLE, HALF, ISO 160, BOLTED, 304 SS | MKISO160HNH | $187.41 | In stock | half-nipple-bolted iso-flanges-and-fittings | |
| REDUCER, ST. ISO 160 X ISO 63, 304 SS | MKISO16063R | $227.29 | In stock | straight-reducer iso-flanges-and-fittings | |
| TEE, EQUAL, ISO 160, 304 SS | MKISO160T | $564.43 | In stock | equal-tee-2 iso-flanges-and-fittings | |
| TEE, RED., ISO 160 X ISO 63, 304 SS | MKISO16063TR | $340.93 | Available on backorder | reducer-tee iso-flanges-and-fittings | |
| CENTER RING, ISO 200, VITON, ALUM., RETAINER | MKISO200CRAR | $43.07 | In stock | alum-centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| CLAMP, SINGLE CLAW, ISO 160/250, ALUM., M10 X 35 | MKISO160250SCPM | $5.75 | In stock | single-and-double-claw-clamp iso-flanges-and-fittings | |
| CROSS, RED., 4-WAY, ISO 160 X ISO 80, 304 SS | MKISO160804X | $534.33 | Available on backorder | 4-way-cross-reducing-2 iso-flanges-and-fittings | |
| ELBOW, 90D, ISO 250, MITERED, 304 SS | MKISO250E90M | $1,580.50 | In stock | 90d-elbow-mitered iso-flanges-and-fittings | |
| Flange Vacuum, Blank, LF, ISO 200, Aluminum | MKISO200BA | $101.52 | In stock | alum-blank-flange iso-flanges-and-fittings | |
| FLANGE, BORED, BOLTED, ISO 200, 8.0", 304 SS | MKISO20080BFH | $181.83 | In stock | bored-flange-bolted iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 80, 3.0", 304 SS | MKISO8030BF | $51.52 | In stock | bored-flange iso-flanges-and-fittings | |
| Flange, Vacuum, Blank Bolted, LF, ISO 200, 304 SST | MKISO200BH | $225.01 | In stock | blank-flange-bolted iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 100, 304 SST | MKISO100B | $65.16 | In stock | blank-flange iso-flanges-and-fittings | |
| NIPPLE, HALF, ISO 200, BOLTED, 304 SS | MKISO200HNH | $279.13 | In stock | half-nipple-bolted iso-flanges-and-fittings | |
| REDUCER, ST. ISO 160 X ISO 80, 304 SS | MKISO16080R | $223.30 | In stock | straight-reducer iso-flanges-and-fittings | |
| ISO 200, SS Center Ring, Viton, Alum Retainer | MKISO200CRR | $76.56 | In stock | centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| TEE, RED., ISO 160 X ISO 80, 304 SS | MKISO16080TR | $365.93 | In stock | reducer-tee iso-flanges-and-fittings | |
| CENTER RING, ISO 250, VITON, ALUM., RETAINER | MKISO250CRAR | $65.00 | In stock | alum-centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| CLAMP, SINGLE CLAW, ISO 320/500, ALUM., M12 X 50 | MKISO320500SCPM | $7.80 | In stock | single-and-double-claw-clamp iso-flanges-and-fittings | |
| CROSS, RED., 4-WAY, ISO 160 X ISO 100, 304 SS | MKISO1601004X | $756.83 | Available on backorder | 4-way-cross-reducing-2 iso-flanges-and-fittings | |
| Flange Vacuum, Blank, LF, ISO 250, Aluminum | MKISO250BA | $135.58 | In stock | alum-blank-flange iso-flanges-and-fittings | |
| FLANGE, BORED, BOLTED, ISO 250, 10.0", 304 SS | MKISO250100BFH | $257.59 | In stock | bored-flange-bolted iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 80, 3.0", 316 SS | MKISO8030BF316 | $100.57 | In stock | 316-ss-iso-bored-flanges bored-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| Flange, Vacuum, Blank Bolted, LF, ISO 250, 304 SST | MKISO250BH | $319.00 | In stock | blank-flange-bolted iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 100, 316 SST | MKISO100B316 | $125.82 | In stock | 316-ss-iso-blank-flanges blank-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| ISO 250, SS Center Ring, Viton, Alum Retainer | MKISO250CRR | $103.68 | In stock | centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| NIPPLE, HALF, ISO 250, BOLTED, 304 SS | MKISO250HNH | $350.90 | In stock | half-nipple-bolted iso-flanges-and-fittings | |
| REDUCER, ST., ISO 160 X ISO 100, 304 SS | MKISO160100R | $253.80 | In stock | straight-reducer iso-flanges-and-fittings | |
| TEE, RED., ISO 160 X ISO 100, 304 SS | MKISO160100TR | $492.46 | In stock | reducer-tee iso-flanges-and-fittings | |
| CENTER RING, ISO 320, VITON, ALUM., RETAINER | MKISO320CRAR | $90.92 | In stock | alum-centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 100, 4.0", 304 SS | MKISO10040BF | $56.82 | In stock | bored-flange iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 160, 304 SST | MKISO160B | $86.37 | In stock | blank-flange iso-flanges-and-fittings | |
| ISO 320, SS Center Ring, Viton, Alum Retainer | MKISO320CRR | $385.00 | In stock | centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 100, 4.0", 316 SS | MKISO10040BF316 | $106.59 | In stock | 316-ss-iso-bored-flanges bored-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 160, 316 SST | MKISO160B316 | $166.10 | In stock | 316-ss-iso-blank-flanges blank-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| ISO 400, SS Center Ring, Viton, Alum Retainer | MKISO400CRR | $510.00 | In stock | centering-ring-with-viton-o-ring-alum-retainer iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 160, 6.0", 304 SS | MKISO16060BF | $82.58 | In stock | bored-flange iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 200, 304 SST | MKISO200B | $159.10 | In stock | blank-flange iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 160, 6.0", 316 SS | MKISO16060BF316 | $147.40 | In stock | 316-ss-iso-bored-flanges bored-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 200, 316 SST | MKISO200B316 | $285.29 | Available on backorder | 316-ss-iso-blank-flanges blank-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 200, 8.0", 304 SS | MKISO20080BF | $128.80 | In stock | bored-flange iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 250, 304 SST | MKISO250B | $269.71 | In stock | blank-flange iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 200, 8.0", 316 SS | MKISO20080BF316 | $229.90 | In stock | 316-ss-iso-bored-flanges bored-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| Flange, Vacuum, Blank, LF, ISO 250, 316 SST | MKISO250B316 | $483.63 | Out of stock | 316-ss-iso-blank-flanges blank-flange 316-stainless-steel-components iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 250, 10.0", 304 SS | MKISO250100BF | $208.35 | In stock | bored-flange iso-flanges-and-fittings | |
| FLANGE, BORED, ISO 250, 10.0", 316 SS | MKISO250100BF316 | $372.90 | Available on backorder | 316-ss-iso-bored-flanges bored-flange 316-stainless-steel-components iso-flanges-and-fittings |