Orders Over $150 Ship For Free Within The USA

SEARCH FOR PARTS

Jonsered

We specialize in older jonsered chainsaws. We can identify your old jonsered chainsaw if you don’t know what it is. Tons of parts for the older all metal constructed models of jonsered. 50 51 52 52E 49sp 521 621 70E 80 90. We also have used chainsaw parts for newer turbo models and models from the 1980’s like 520 sp and 510 sp.
Sold Out!

Jonsered 49sp-521e Series Chainsaw Clutch Washer NEW 504 18 44-01 (J-04)

  Clutch washer. 504184401 New part from old dealer stock Fits: Jonsereds 49 sp, 50, 51, 52, 52e, 521ev

View
$5.00
Ready to ship
(1 in stock)

Jonsered 49SP-52E Chainsaw Clutch Inner Bearing 504 52 19-02 (J-03)

  Part: inner bearing / race for the clutch drum Part # 504521902 Fits: Jonsereds 49 sp, 50, 51, 52, 52e, 521ev

View
$5.00
Sold Out!

jonsered 670 chainsaw intake manifold spacer kit with insulator, gasket and bolts

  Part: intake manifold insulator spacer wtih gasket, bolts and insulator Condition: good used/working order Fits: some models of Jonsered 670, which do not have boot type intakes

View
$9.99
Sold Out!

jonsered 670 chainsaw lot off assorted hardware #2 - screws

  Part: lot of misc. hardware - screws / bolts Condition: good used/working shape Fits: Jonsered 670

View
$4.50
Sold Out!

jonsered 2095 turbo chainsaw choke rod pull

  Part: choke rod pull Part # 503 64 68-01 Condition: good used/working shape Fits: Jonsered 2095 turbo

View
$4.99
Sold Out!

jonsered 670 chainsaw muffler hardware kit - bolts, gasket, shield

  Part: bolts /screw set, heat shield (503 51 99-01), nuts and exhaust gasket for the muffler Condition: good used/working shape Fits: Jonsered 670

View
$9.99
Sold Out!

jonsered 2095 turbo chainsaw tank vent assembly

  Part: fuel tank vent and line Part # 503 16 40-01 Condition: good used/working shape Fits: Jonsered 2095 turbo

View
$8.50
Sold Out!

jonsered 2054 turbo chainsaw wrist pin and bearing

Part: wrist pin and bearing for the piston Condition: good used/working shape Fits: Jonsered 2054 turbo  

View
$6.95
Sold Out!

jonsered 920, 930 chainsaw lot of assorted hardware #1

  Part: lot of misc. hardware- screws  Condition: good used/working shape Fits: Jonsered 920, 930

View
$5.00
Sold Out!

jonsered 490, 590 chainsaw small lot of screws #2

  Part: small lot of hardware-includes screws and nuts pictured Condition: good used/working shape Fits: Jonsered 490, 590

View
$3.99
Sold Out!

jonsered 2150 turbo chainsaw lot of assorted hardware

  Part: lot of misc. hardware - screws/bolts (includes everything pictured) Condition: good used/working shape Fits: Jonsered 2150 turbo

View
$6.95
Sold Out!

jonsered 49sp to 52 series chainsaw throttle rod and hardware kit

  Part: throttle rod link and hardware pictured Part # 504 84 14-01504 38 67-00 + Condition: good used/working shape Fits: Jonsered 49 sp, 50, 51, 52, 52e

View
$7.99
Sold Out!

jonsered 490, 590 chainsaw muffler for heated handles

  Part: muffler for saws with heated handles with bracket support Part # 505 35 04-72 (bracket) Condition: good used/working order Fits: Jonsereds 490 and 590

View
$35.00
Sold Out!

jonsered 80, 90 chainsaw upper rear handle av buffer mount pn 504 12 50-16 used

Part: av buffer mount for the rear handle Part # 504 12 50 16 Condition: good used/working shape Fits: Jonsereds m80 and 90

View
$6.99
Sold Out!

jonsered 2054, 2055 turbo chainsaw brake band and knee joint lever

  Part: brake band with knee joint lever Part # 506 08 31-01 and 501 87 53-01 Condition: good used/working order Fits: Jonsered 2054 and 2055 turbo

View
$9.95
Ready to ship
(3 in stock)

jonsered 90, 80 chainsaw bottom cast half, right half

  Part: right side of bottom casting for the rear handle Part # 504 65 57-04 Condition: good used/working order Fits: Jonsereds 80, 90

View
$7.00
Ready to ship
(3 in stock)

jonsered cs2156 turbo chainsaw filter housing base

  Part: filter housing base Part # 503 92 79-04 Condition: good used/working shape Fits: Jonsered cs 2156 turbo, 2159

View
$5.00
Sold Out!

jonsered 490, 590 chainsaw handle hardware part # 505 27 92-11

  Part: handle hardware part Part # 505 27 92 11 Condition: good used/working shape Fits: Jonsered 490, 590

View
$4.50
Sold Out!

jonsered 490, 590 chainsaw large lot of assorted hardware #1

  Part: lot of misc. hardware - screws, bolts, nuts, washers (includes everything pictured) Condition: good used/working shape Fits: Jonsered 490, 590

View
$7.50
Ready to ship

jonsered 490, 590, 510sp, 450 chainsaw bar bolt set

  Part: set of bar bolts / studs Part # 505 22 09-37 Condition: good used/working shape Fits: Jonsered 490, 590, 510 sp, 450, 535

View
$7.99
Ready to ship
(1 in stock)

jonsered 490 chainsaw crankshaft and rod

  Part: crank shaft and connecting rod Part # 503 11 21-01 Condition: good used/working shape Fits: Jonsered 490

View
$39.95
Sold Out!

husqvarna 362 special and jonsered 2063 turbo chainsaw piston with no ring (362 bin)

  Part: piston only, no ring etc. Condition: good used/working shape Fits: Husqvarna 362 special and Jonsered 2063 turbo

View
$14.50
Sold Out!

jonsered 2156, 2159 turbo chainsaw lot of assorted hardware

  Part: lot of misc. hardware-  includes 2 brake bolts (503 89 30-03), nut, washers, and screws and bolts (includes everything pictured) Condition: good used/working shape Fits: Jonsered cs2156, cs2159 turbo

View
$6.50
Sold Out!

jonsered cs2156 turbo chainsaw fuel cap

  Part: fuel / gas tank filler cap Condition: good used/working shape Fits: Jonsered cs 2156 turbo

View
$3.99
Ready to ship
(3 in stock)

jonsered 2156, 2159 turbo chainsaw switch wire

  Part: switch wires harness Part # 503 89 87-01 Condition: good used/working shape Fits: Jonsered cs2156, cs2159 turbo

View
$4.50
Ready to ship
(3 in stock)

jonsered 2156, 2159 turbo chainsaw 3/8x7 clutch sprocket drum

  Part: 3/8-7 clutch sprocket drum and rim Condition: good used/working shape Fits: Jonsered cs2156, cs2159 turbo

View
$8.99
Sold Out!

jonsered cs2141, cs2150 chainsaw muffler

Part: muffler with spark arrestor screen Part # 503 86 28-03 Condition: good used/working shape. Has a minor ding on side of muffler. Fits: Jonsered CS 2141, 2150

View
$19.95
Ready to ship
(2 in stock)

jonsered 2050, 2041, 2045 turbo chainsaw switch bracket

  Part: switch bracket Part # 503 74 81-01 Condition: good used/working shape Fits: Jonsered 2041, 2045, 2050 turbo

View
$2.99
Ready to ship
(2 in stock)

jonsered 455 chainsaw cylinder bolt set

Part: set of 4 cylinder / head bolts. Part # 725 53 45-55 Condition: good used/working shape  Fits: Jonsereds 455, 535 and others

View
$4.50
Ready to ship
(1 in stock)

jonsered 2077, 2083 turbo chainsaw brake bushing

Part: H bushing for the brake handle guard. Part # 503 23 45-02, 503 43 61-01 Condition: good used/working shape Fits: Jonsered 2083, 2077 turbo

View
$4.50
Sold Out!

jonsered 2159 turbo chainsaw wrist pin bearing

Part: wrist pin bearing Condition: good used/working shape Fits: Jonsered 2159 turbo  

View
$4.50
Sold Out!

jonsered 910 chainsaw clutch carrier

Part:  clutch carrier rotor Part # 504 54 30-04 Condition: good used/working shape Fits:  Jonsered 910  

View
$7.50
Ready to ship
(1 in stock)

jonsered 910 chainsaw handle support brace plate

Part:  handle support brace plate Part # 504 73 00-35 Condition: good used/working shape Fits: Jonsered 910

View
$8.99
Sold Out!

jonsered 910 chainsaw 3/8-8 rim clutch sprocket drum with bearing and rim

Part: clutch sprocket drum with bearing, washer and includes a new 3/8-8 replaceable rim Condition: good used/working shape Fits: Jonsered 910

View
$16.50
Ready to ship
(1 in stock)

jonsered 621 chainsaw clutch sprocket assembly type 2 (spur style)

Part: clutch sprocket drum with bearing, race, washers, nut and mechanism (shoes, spring, carrier (Part # 504 54 05-00) Condition: good used/working shape Fits:Jonsered 621  

View
$29.95
Sold Out!

jonsered 621 chainsaw chain catcher stop

Part: chain stop Part # 504 11 11-01 Condition: good used/working shape Fits: Jonsered 621  

View
$6.50
Sold Out!

jonsered 2054 turbo chainsaw muffler assembly type 4 pn 503 89 32-04

  Part: muffler with bolts, gasket and spark arrestor Part # 503 89 32 04 Condition: good used/working shape Fits: some models of Jonsered 2054 and some other models

View
$29.95
Sold Out!

jonsered 2095 turbo chainsaw starter recoil cover and pulley assembly

  Part: starter fan housing cover with pulley, rewind spring and grip Part # 506 15 36-02 includes 506 13 32-02, 503 43 19-01, 503 43 21-04, 504 65 42-03 Condition: good used/working shape. Has a few cracked grills. Fits: Jonsered 2095 Turbo

View
$45.00
Ready to ship
(4 in stock)

jonsered 2141, 2145, 2150 chainsaw brake bolt

Part: brake bolt / screw for the hand guard Part #  503 89 30-01 Condition: good used/working shape Fits:Jonsered 2141, 2145, 2150 turbo

View
$1.99
Sold Out!

jonsered 80 chainsaw spark plug cover

Part: spark plug cover part # 504 12 56-00 Condition: good used/working shape Fits: Jonsereds 80  

View
$5.95
Ready to ship
(4 in stock)

jonsered 455 chainsaw crankshaft and rod

  Part: crank shaft and connecting rod 503 11 88-01 Condition: good used/working shape Fits: Jonsered 455 535

View
$19.95
Ready to ship
(2 in stock)

jonsered 2159 turbo chainsaw guide bar stud bolt

  Part: bar bolt. Part # 503 87 54-02 Condition: good used/working shape Fits: Jonsered 2159 turbo

View
$3.99
Ready to ship
(1 in stock)

jonsered 920 chainsaw carburetor bolt set

  Part: set of carb bolts /screws Part # 725 53 45-55 Condition: good used/working shape Fits: Jonsereds 920

View
$3.99
Ready to ship
(2 in stock)

jonsered 920 chainsaw oil pickup line assembly

  Part: oil pickup line / hose assy. Part # 504 71 00-03, 504 30 00-37, 504 12 07-04, 503 30 00-42, 504 31 20-08 Condition: good used/working shape Fits: Jonsered 920. May also fit other models

View
$7.00
Ready to ship
(1 in stock)

jonsered 630, 670 chainsaw case bolt set

  Part: set of bolts for the case Condition: good used/working shape Fits: Jonsered 630, 670

View
$3.00
Sold Out!

jonsered 2071, 2171, 2063, 2163 turbo chainsaw chainbrake knee joint lever

  Part: knee joint lever for the chainbrae Part # 501 87 53-03 Condition: good used/working shape Fits: Jonsered 2071, 2171, 2063, 2163 turbo

View
$4.99
Ready to ship
(1 in stock)

jonsered 2171, 2071, 2063, 2163 turbo chainsaw brake band only

  Part: brake band Part # 503 75 22-01 Condition: good used/working shape Fits: Jonsered 2071, 2171, 2063, 2163 turbo

View
$7.99
Ready to ship
(1 in stock)

jonsered m36, 361, 365 and Pioneer p10 chainsaw muffler screw pn 428516 new (poulan box 7)

  Part: screw for the muffler Part # 428516 Condition: new, old stock part. Dusty/dirty/may have minor oxidation from years of sitting in storage Fits: Jonsered M 36, 361, 365 and Pioneer P 10 Location: Poulan Box 7

View
$2.99
Ready to ship

Jonsered M-36, 361, 365 and Pioneer P10 chainsaw pivot pin 507100084 new (poulan bin 7)

 Pivot pin for flywheel. Part # M-100084 Condition: new, old stock part. Fits: Jonsered M 36, 361, 365 and Pioneer P 10

View
$2.50
Ready to ship
(1 in stock)

jonsered m36, 361, 365 and pioneer p10 chainsaw pulley grip handle (365 bin)

  Part: grip handle Part # 10074 Fits: Pioneer P 10 and Jonsered m36, 361, 365

View
$4.50
Ready to ship
(3 in stock)

jonsered 70e, 66e, 90, 80 chainsaw throttle safety interlock (70e bin)

  Part: safety interlock release lever Part # 504 84 59-00 Condition: good used/working shape Fits: Jonsered 70 e, 66 e, 90, 80

View
$6.50
Ready to ship
(1 in stock)

jonsered 2077, 2083 II chainsaw av spring mount

  Part: av spring mount isolator for the tank Condition: good used/working shape Fits: Jonsered 2077, 2083 II

View
$6.50
Sold Out!

jonsered 2083, 2077 turbo chainsaw lot of assorted hardware

Part: lot of misc. hardware - screws, bolts -includes everything pictured Condition: good used/working shape Fits:  Jonsered 2077, 2083 II turbo  

View
$7.00
Ready to ship
(1 in stock)

jonsered 630 chainsaw intake gasket

  Part: intake gasket Condition: good used/working shape Fits: Jonsered 630

View
$1.99
Sold Out!

jonsered 630 chainsaw cylinder

  Part: cylinder Condition: good used/working shape, no broken fins, came off a saw with good compression. Fits: Jonsered 630

View
$48.00
Sold Out!

husqvarna 40, 45 and jonsered 2041, 2045, 2050 turbo chainsaw screw set for the filter base (45 bin)

  Part: set of 2 screws / bolts for the filter base mount Condition: good used/working shape Fits:  husqvarna 40, 45 and jonsered 2041, 2045, 2050 turbo

View
$2.99
Ready to ship
(1 in stock)

jonsered 2077 and 2083 II turbo chainsaw throttle trigger and safety lock set

  Part: throttle trigger with safety lever interlock. Part #s 503 42 44-02 and 503 42 45-02 Condition: good used/working shape Fits: Jonsered 2083 II and 2077 turbo

View
$12.00
Sold Out!

jonsered 2171 turbo chainsaw lot of assorted hardware

  Part: misc. hardware- screws, bolts, nuts (includes everything pictured) Condition: good used/working shape Fits: jonsered 2171 turbo

View
$6.50
Ready to ship
(2 in stock)

jonsered 2163, 2071, 2171, 2065, 2063 turbo chainsaw starter pawl kit

Part: starter pawl / ratchet kit with studs, springs for the flywheel. Part #s 503 85 95-01, 501 67 35-01, 501 81 99-01 Condition: good used/working shape Fits: Jonsered 2163, 2071, 2171, 2065, 2063 turbo

View
$8.99
Sold Out!

jonsered 2071 turbo chainsaw right crankcase half #2

  Part: right, clutch side crankcase half only Condition: good used/working shape Fits: Jonsered 2071 turbo

View
$21.00
Sold Out!

jonsered 2071 turbo chainsaw top cover engine shroud

  Part: top cylinder cover shroud Condition: good used/working shape Fits: some models of jonsered 2071 turbo - this model has a one piece type and a 2 part type

View
$24.00
Ready to ship
(1 in stock)

jonsered 49sp to 52e series chainsaw starter spring shield

  Part: starter spring shield Condition: good used/working shape Fits: Jonsered 49 sp, 50, 51, 52, 52e

View
$4.50
Sold Out!

jonsered 625, 630, 670 chainsaw fuel tank insert cap

  Part: fuel tank insert cap, part # 501 52 70-03 Condition: good used/working shape. May be Red or Black in color Fits: Jonsered 625, 630, 670

View
$3.99
Sold Out!

jonsered 2063 turbo chainsaw clutch sprocket cover

  Part: clutch side cover guard Condition: good used/working shape Fits: jonsered 2063 turbo

View
$30.00
Sold Out!

jonsered 2077, 2083 turbo chainsaw brake spring

  Part: brake spring, part # 503 40 81-01 Condition: good used/working shape Fits: jonsered 2077, 2083 turbo

View
$6.50
Ready to ship
(1 in stock)

jonsered 2159 turbo chainsaw carburetor bolt

  Part: (1) carb bolt Condition: good used/working shape Fits: Jonsered 2159 turbo

View
$1.99
Ready to ship
(2 in stock)

jonsered 630 chainsaw crankcase half (right, clutch side)

  Part: right clutch side of the crank case housing Condition: good used/working shape. Has some minor chipping. Fits: Jonsered 630

View
$15.00
Ready to ship
(1 in stock)

jonsered 2159 turbo chainsaw brake lever

  Part: brake lever joint for the chainbrake, part # 503 89 08-02 Condition: good used/working shape Fits: Jonsered 2150, 2141, 2145, 2152, 2149, 2153, 2159, 2156 Turbo

View
$3.99
Sold Out!

jonsered 70e chainsaw 3/8-8 chainsaw rim sprocket drum

  Part: 3/8-8 rim sprocket drum for the clutch. Has a new rim. Includes bearing, race, washers, nut Condition: good used/working shape Fits: jonsered 70 e

View
$15.00
Sold Out!

jonsered 630, 670 chainsaw brake parts lot #2

  Part: parts for the chainbrake Condition: good used/working shape Fits: old style (early model) Jonsered 630, 670 chainsaws

View
$7.99
Sold Out!

jonsered 49sp to 52e series chainsaw bar adjusting pin

Part: bar adjusting pin / nut Condition: good used/working shape Fits: jonsered 49 sp, 50, 51, 52, 52e  

View
$3.99
Ready to ship
(3 in stock)

jonsered 670 chainsaw fuel tank rear trigger handle #4 for recirculating carbs

  Part: fuel/gas tank rear trigger handle housing, bare bones pn 501 77 27-04 Condition: good used/working shape Fits: Jonsered 670 models which have recirculating carburetors

View
$35.00
Sold Out!

jonsered 450 chainsaw ignition coil only

  Part: electrolux ignition coil head only Condition: good used/working shape. tested and makes strong sparke Fits: Jonsered 450

View
$35.00
Sold Out!

jonsered 630, 670 chainsaw brake parts lot #1

  Part: parts for the chainbrake - includes the spring, knee joint and lever, bolts. Condition: good used/working shape Fits: older model (early) jonsered 630, 670 chainsaws

View
$9.95
Ready to ship
(2 in stock)

jonsered 450, 455, 525, 535 chainsaw flywheel only

  Part: flywheel only Condition: good used/working shape. no broken fins. Fits: jonsered 450, 455, 525, 535

View
$10.00
Ready to ship

jonsered 510sp, 520sp chainsaw flywheel nut and washer

  Part: nut and washer for the flywheel Condition: good used/working shape Fits: jonsered 510, 520 sp

View
$3.00
Sold Out!

jonsered 520sp, 510sp chainsw buffer screw and nut

  Part: nut and screw for the top handle buffer mount. Part # 503 22 65-01 and 503 20 00-08 Condition: good used/working shape Fits: jonsered 520/510 sp and some other models

View
$2.50
Sold Out!

jonsered 2159 turbo chainsaw cylinder

Part: cylinder with decompression valve Condition: top cooling fin is broken, but cylinder is usable with a good bore Fits: jonsered 2159 turbo

View
$35.00
Sold Out!

jonsered 2159 turbo chainsaw crankcase half (left, flywheel side)

  Part: left, flywheel side of the crank case housing Condition: good used/working shape Fits: jonsered 2159 turbo

View
$19.95
Sold Out!

jonsered 2171 turbo chainsaw cam bushing

  Part: oil pump cam bushing Condition: good used/working shape Fits: jonsered 2171 turbo

View
$4.50
Ready to ship
(1 in stock)

jonsered 2171, 2071 turbo chainsaw brake band kit

  Part: brake band kit, includes the band, lever and knee joint, spring, brake arm Condition: good used/working shape Fits: jonsered 2171, 2071 turbo  

View
$17.75
Sold Out!

jonsered 2159 turbo chainsaw black ignition coil #1

  Part: ignition coil head only Condition: good used/working shape. Tested and works. Fits: Jonsered 2159 turbo

View
$21.00
Ready to ship
(2 in stock)

jonsered 52, 52e chainsaw air filter cover and knob

  Part: air filter cover and knob Condition: good used/working shape Fits: Jonsered 52, 52e

View
$14.50
Sold Out!

jonsered 49sp to 521 chainsaw switch plate & nut

  Part: off switch plates and nut Condition: good used/working shape Fits: Jonsered 49sp, 50, 51, 52, 52e, 521

View
$3.50
Sold Out!

jonsered 490, 590 chainsaw clutch mechanism spring

Part: (1) clutch spring Condition: good used/working shape Fits: Jonsered 490, 590  

View
$4.50
Sold Out!

Jonsered 365 chainsaw chainbrake band and mechanism kit

  Chainbrake band and spring kit   In good used shape   Fits Jonsered 365, Husqvarna 35 and many others

View
$10.00
Sold Out!

jonsered 49sp to 521 chainsaw fuel cap #2 (without gasket)

  Part: fuel gas cap only, does Not include the gasket. Part # 504 70 26-00 Condition: good used/working shape Fits: Jonsered 49 sp, 50, 51, 52, 52e, 521, 521e

View
$5.00
Sold Out!

jonsered 36, 361 chainsaw filter cover screw

  Part: filter cover screw Condition: good used/working shape Fits:  Jonsered 36, 361

View
$1.50
Ready to ship
(1 in stock)

jonsered 2040 turbo chainsaw top cover

  Part: top cover engine shroud. Part # 530 03 72-26 Condition: good used/working shape Fits: Jonsered 2040 Turbo

View
$15.00
Ready to ship
(4 in stock)

jonsered 630 chainsaw crankcase housing half (left, flywheel side)

  Part: crank case half- bare bones Condition: good used/working shape Fits: Jonsered 630

View
$15.00
Ready to ship

jonsered 2159 turbo chainsaw air duct jet

  Part: air duct, part # 503 92 90-01 Condition: good used/working shape Fits: Jonsered 2159 turbo

View
$3.50
Sold Out!

jonsered 520 sp chainsaw handle bar clip and washer

  Part: handlebar washer and clip (part # 735 31 13-20) Condition: good used/working shape Fits: Jonsered 520sp  

View
$4.50
Sold Out!

jonsered 455 chainsaw starter pawl and stud set

  Part: set of starter pawls and studs for the flywheel. Part #s 503 41 22-01 & 501 64 67-01. Condition: good used/working shape Fits: Jonsered 455 and some other models.

View
$7.99
Ready to ship
(1 in stock)

jonsered 49sp to 521 series chainsaw handle collar plate pn 504 06 53-05 used

Part: handle collar plate Part # 504 06 53 05 Condition: good used/working shape Fits: Jonsered 49 sp, 50, 51, 52, 52e, 521, 70e, 621  

View
$2.99
Sold Out!

jonsered 80, 90 chainsaw clutch bearing and race

  Part: clutch bearing and race, part #s 504 23 31-00, 504 52 22-01 Condition: good used/working shape Fits: Jonsereds 80, 90

View
$6.99
Sold Out!

jonsered 80 chainsaw piston pin, bearing and seals

  Part: piston pin (504 41 27-00) bearing (504 23 27-00) and seal set (504 14 70-00) Condition: good used/working shape Fits: Jonsered 80

View
$9.99
Sold Out!

jonsered 80 chainsaw custom crankshaft with sealed bearings

Part: crank shaft with connecting rod and bearings. Custom made from P.P. Crank Shop. with sealed bearings. Condition: good used/working shape Fits: Jonsereds 80

View
$49.95
Sold Out!

jonsered 601 chainsaw adjusting pin

Part: chain adjust pin. 504 59 15-00 Condition: good used/working shape Fits: Jonsered 621 70E 80 90

View
$3.00
Ready to ship
(1 in stock)

jonsered 2041, 2045, 2050 turbo chainsaw muffler bracket and screen

  Part: muffler bracket plate and screen. Part #s 506 01 20-02, 506 0101 19-01 Condition: good used/working shape Fits: Jonsered 2041, 2045, 2050 Turbo

View
$7.50