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SELECTION GUIDE

Every Lewmar portlight family side by side: overall size, hull cut-out, weight, hull thickness limits and part numbers, so you can match a new portlight to your existing cut-out.

DocumentLewmar Hatch & Portlight Selection Guide
FormatPDF · 12 pages · 3.5 MB
LanguageEnglish
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How to ChooseFlush Mitre PortlightStainless PortlightStandard PortlightAtlantic PortlightProducts
Lewmar Hatch & Portlight Selection Guide — Portlights

How to Choose a Lewmar Hatch or Portlight

Pick the family

  • Flush Hatch / Flush Hatch 3G: acrylic sits flush with the deck, drained by deck-moulded channels. Sizes 10 to 70.
  • Low Profile: smaller sizes suit any deck location on a sailboat; larger sizes work as foredeck hatches on small to mid size yachts. Square, D-hatch and round versions.
  • Medium Profile: thicker acrylic and deeper frame sections; the foredeck hatch for larger offshore yachts. Sizes 30 to 77.
  • Ocean: classic rugged hatch, Flat Base or Flange (25 mm / 1" flange) lower frame.
  • Pilot: sliding hatch for wheelhouses and cockpit canopies of power craft only; not for normal decks or coachroofs.
  • Portlights: Flush Mitre, Stainless Steel, Round Stainless, Standard and Atlantic.

Read the tables like this

  • Size is the Lewmar size number; the same number gives the same cut-out across most hatch families.
  • X, Y, Z, R are the overall dimensions and corner radius; X1, Y1, R1 are the deck cut-out you saw.
  • Cut-out dimensions change if a trim kit is used: add 4 mm to X1 and Y1 and 2 mm to R1.
  • Sizes marked * are the minimum size for ISO 9094 escape hatches.
  • Hatches and portlights must be fitted to a flat surface, maximum tolerance ±1 mm.
  • Check hull thickness against the portlight limits before ordering.

Looking for hatches? Part 1: Hatches →

Flush Mitre Portlight

  • Acrylic almost flush with the mounting surface; 12 mm (1/2") acrylic, Grey or Dark Grey; flat outer frame powder coated black.
  • Clip handles standard, twist handles optional. Flyscreen not supplied as standard.
  • Supplied with 12 off M5 × 16 mm screws.
Part no. grey Part no. dark grey Size Overall width (X) Overall length (Y) Cut-out width (X1) Cut-out length (Y1) Weight Grey Dark grey
393029800 393029802 0 175
6 7/8" 		322
12 11/16" 		156
6 1/8" 		303
11 15/16" 		1.3 kg
2.9 lb 		Grey → Dark grey →
393129800 393129802 1 190
7 1/2" 		366
14 7/16" 		171
6 3/4" 		347
13 11/16" 		1.6 kg
3.5 lb 		Grey → Dark grey →
393329800 – 3 190
7 1/2" 		448
17 11/16" 		171
6 3/4" 		429
16 7/8" 		2.0 kg
4.4 lb 		Grey → –
393429800 – 4 190
7 1/2" 		645
25 7/16" 		171
6 3/4" 		626
24 11/16" 		2.8 kg
6.2 lb 		Grey → –
393529800 – 5 263
10 11/32" 		448
17 5/8" 		244
9 5/8" 		429
16 7/8" 		2.6 kg
5.7 lb 		Grey → –

All sizes: height (Z) 4 mm (5/32"), radius (R) and cut-out radius (R1) 5 mm (3/16").

Valance & fastening by hull thickness

Part no. Hull thickness Fastening
361799999 3.5 to 6.5 mm M5 × 12 mm Ask us to source it →
361800999 7 to 9 mm M5 × 16 mm (supplied as standard) Ask us to source it →

Standard valance suits hull thickness 3.5 to 9 mm; another valance is available for hulls up to 17.5 mm. Fastenings come in bags of 100.

Stainless Steel Portlight

  • Polished stainless outer frame, ABS plastic trim, grey moulding, grey acrylic standard.
  • Clip handles standard, twist optional. Comes complete with trim and flyscreen.
  • Clamps the cabin side between inner and outer frame; install with sealant or closed cell PVC tape.
  • Hull thickness 9 mm minimum, 30 mm maximum. Supplied with M5 × 20 screws for hull thickness 12–17 mm.
Part no. Size Trim Version Overall length (X) Overall width (Y) Corner radius (R) Cut-out length (X1) Cut-out width (Y1) Cut-out radius (R1) Weight Acrylic
393020262 0 White Opening 176
6 15/16" 		323
12 11/16" 		62.0
2 7/16" 		156
6 1/8" 		303
12" 		52.0
2 1/16" 		1.5 kg
3.30 lb 		8 mm
1/2 (as printed)" 		View product →
393010262 0 White Fixed 176
6 15/16" 		323
12 11/16" 		62.0
2 7/16" 		156
6 1/8" 		303
12" 		52.0
2 1/16" 		1.5 kg
3.30 lb 		10 mm
3/8" 		View product →
393120262 1 White Opening 191
7 1/2" 		367
14 7/16" 		62.0
2 7/16" 		171
6 3/4" 		347
13 5/8" 		52.0
2 1/16" 		1.7 kg
3.80 lb 		8 mm
1/2 (as printed)" 		View product →
393110262 1 White Fixed 191
7 1/2" 		367
14 7/16" 		62.0
2 7/16" 		171
6 3/4" 		347
13 5/8" 		52.0
2 1/16" 		1.7 kg
3.80 lb 		10 mm
3/8" 		View product →
393180262 1RE White Opening 191
7 1/2" 		367
14 7/16" 		95.5
3 3/4" 		171
6 3/4" 		347
13 5/8" 		85.5
3 3/8" 		1.7 kg
3.74 lb 		10 mm
3/8" 		View product →
393170262 1RE White Fixed 191
7 1/2" 		367
14 7/16" 		95.5
3 3/4" 		171
6 3/4" 		347
13 5/8" 		85.5
3 3/8" 		1.7 kg
3.74 lb 		10 mm
3/8" 		View product →
393780262 7RE White Opening 191
7 1/2" 		425
16 3/4" 		95.5
3 3/4" 		171
6 3/4" 		405
15 15/16" 		85.5
3 3/8" 		1.9 kg
4.18 lb 		10 mm
3/8" 		View product →
393770262 7RE White Fixed 191
7 1/2" 		425
16 3/4" 		95.5
3 3/4" 		171
6 3/4" 		405
15 15/16" 		85.5
3 3/8" 		1.9 kg
4.18 lb 		10 mm
3/8" 		View product →
393820862 8 Chrome Opening 196
7 11/16" 		452
17 13/16" 		N/A See drawing on website 1.9 kg
4.18 lb 		10 mm
3/8" 		View product →
393810862 8 Chrome Fixed 196
7 11/16" 		452
17 13/16" 		N/A See drawing on website 1.9 kg
4.18 lb 		10 mm
3/8" 		View product →

All sizes: height (Z) 4 mm (5/32").

Round Stainless Steel Portlight

Part no. Trim Version Overall Ø Cut-out Ø A B Weight Thickness
30209800 Chrome Opening 250
9 7/8" 		230
9 1/16" 		76
3" 		113
4 7/16" 		1.4 kg
3 lb 		10 mm
3/8" 		View product →
30209900 Chrome Opening 296
11 5/8" 		277
10 7/8" 		100
3 15/16" 		136
5 3/8" 		2.0 kg
4 lb 		10 mm
3/8" 		Ask us to source it →

Round: hull thickness 8–24 mm; supplied with M5 × 12 fastenings; no flyscreen available. A and B locate the hinge flat on the cut-out circle (see drawing in the PDF).

Standard Portlight

  • Silver anodised frame standard, white ABS trim, grey moulding, grey acrylic standard.
  • Supplied with flyscreen except sizes 4L and 4R. Clip handles standard, twist optional.
  • Hull thickness 7 mm minimum, 34 mm maximum. Supplied with 12 off M5 × 25 screws for hull thickness 17–25 mm.
Part no. Size Overall length (X) Overall width (Y) Corner radius (R) Cut-out length (X1) Cut-out width (Y1) Cut-out radius (R1) Weight Acrylic
393020200 0 176
6 15/16" 		323
12 11/16" 		62.0
2 7/16" 		156
6 1/8" 		303
11 15/16" 		52.0
2 1/16" 		1.1 kg
2.42 lb 		6 mm
1/4" 		View product →
393120200 1 191
7 1/2" 		367
14 7/16" 		62.0
2 7/16" 		171
6 3/4" 		347
13 11/16" 		52.0
2 1/16" 		1.3 kg
2.86 lb 		6 mm
1/4" 		View product →
393180200 1RE 191
7 1/2" 		367
14 7/16" 		95.5
3 3/4" 		171
6 3/4" 		347
13 11/16" 		85.5
3 3/8" 		1.3 kg
2.86 lb 		8 mm
5/16" 		View product →
393220200 2 176
6 15/16" 		425
16 3/4" 		62.0
2 7/16" 		156
6 1/8" 		405
15 5/16 (as printed)" 		52.0
2 1/16" 		1.4 kg
3.08 lb 		8 mm
5/16" 		View product →
393320200 3 191
7 1/2" 		449
17 11/16" 		62.0
2 7/16" 		171
6 3/4" 		429
16 7/8" 		52.0
2 1/16" 		1.7 kg
3.74 lb 		10 mm
3/8" 		View product →
393420200 4 191
7 1/2" 		646
25 7/16" 		62.0
2 7/16" 		171
6 3/4" 		626
24 11/16" 		52.0
2 1/16" 		2.4 kg
5.28 lb 		8 mm
5/16" 		View product →
393440200 4R 195
7 11/16" 		708
27 7/8" 		62.0
2 7/16" 		175
6 7/8" 		688
27 1/16" 		52.0
2 1/16" 		2.4 kg
5.28 lb 		8 mm
5/16" 		View product →
393460200 4L 195
7 11/16" 		708
27 7/8" 		62.0
2 7/16" 		175
6 7/8" 		688
27 1/16" 		52.0
2 1/16" 		2.4 kg
5.28 lb 		8 mm
5/16" 		View product →
393520200 5 264
10 3/8" 		449
17 11/16" 		62.0
2 7/16" 		244
9 5/8" 		429
16 7/8" 		52.0
2 1/16" 		2.3 kg
5.15 lb 		10 mm
3/8" 		View product →
393780200 7RE 191
7 1/2" 		425
16 3/4" 		95.5
3 3/4" 		171
6 3/4" 		405
15 15/16" 		85.5
3 3/8" 		2.4 kg
5.28 lb 		8 mm
5/16" 		View product →

All sizes: height (Z) 4 mm (5/32").

Atlantic Portlight

  • Smoke grey acrylic, silver anodised frame, friction hinges; clip handles standard, screw handles optional.
  • Comes with alloy valance, flyscreen and fastenings. Order the thin or thick valance part number to suit your hull.
  • Opening is restricted on very thick hulls: at 24 mm hull thickness the opening angle is 115°.
Part no. thin valance Part no. thick valance Size Overall length (X) Overall width (Y) Corner radius (R) Cut-out length (X1) Cut-out width (Y1) Cut-out radius (R1) Weight Thin valance Thick valance
39110090 39110070 10 174
6 15/16 (as printed)" 		304
12" 		71
2 13/16" 		154
6 1/16" 		284
11 3/16" 		61
2 3/8" 		1.6 kg
3.5 lb 		Thin valance → Thick valance →
39130090 39130070 30 200
7 7/8" 		400
15 3/4" 		71
2 13/16" 		180
7 1/16" 		380
14 15/16" 		61
2 3/8" 		2.2 kg
4.8 lb 		Thin valance → Thick valance →
39132090 39132070 32 198
7 13/16" 		401
15 13/16" 		99
3 7/8" 		178
7" 		381
15" 		89
3 1/2" 		2.1 kg
4.6 lb 		Thin valance → Thick valance →
39140090 39140070 40 200
7 7/8" 		480
18 7/8" 		71
2 13/16" 		180
7 1/16" 		460
18 1/8" 		61
2 3/8" 		2.5 kg
5.5 lb 		Thin valance → Thick valance →
39160090 39160070 60 200
7 7/8" 		600
23 5/8" 		71
2 13/16" 		180
7 1/16" 		580
22 13/16" 		61
2 3/8" 		3.0 kg
6.6 lb 		Thin valance → Thick valance →

All sizes: height (Z) 6 mm (1/4"), acrylic 8 mm (5/16").

Valance & fastening by hull thickness

Part no. Hull thickness Valance Fastening
360360999 8–10 mm Thin hull valance M5 × 12 mm (standard with thin valance) View product →
360361999 11–15 mm Thin hull valance M5 × 16 mm View product →
360362999 16–19 mm Thick hull valance M5 × 20 mm View product →
360363999 20–24 mm Thick hull valance M5 × 25 mm (standard with thick valance) View product →

Fastenings come in bags of 100.

Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.

Products in this Selection Guide