Tsumura, Husqvarna, Echo, Shindaiwa, Jonsered, Makita, Dolmar Lightweight Bar 428FK4 - 20", 3/8", .063", Premium Sprocket Nose, D009, 596 69 12-72, 596691272, 501 95 69-72, 501956972, 430521-12431, 203RNDD009

Tsumura Lightweight Bar - 20", 3/8", .063", Premium Sprocket Nose, D009

Product Overview

The Tsumura 428FK4 is a premium "Light & Tough" professional chainsaw bar manufactured in Japan. Engineered for the D009 (HV) mount, it features Tsumura’s signature weight-reduction technology: staggered dove-tailed notches are laser-cut into the SKS-51 steel body and filled with a specialized hard resin. This reduces the bar's weight by approximately 20%.

The weight saved at the tip significantly improves the saw’s balance, moving the center of gravity back toward the operator. This makes a 20-inch bar feel as agile as a much shorter setup, drastically reducing fatigue during a full day of professional felling or bucking.

Genuine OEM & Aftermarket Cross-Reference

This bar is a 100% direct high-performance replacement for the following .063 gauge / D009 part numbers:

• HUSQVARNA (OEM): 596 69 12-72, 596691272 (X-Tough Solid RSN) / 501 95 69-72, 501956972
• ECHO / SHINDAIWA (OEM): 430521-12431, 43052112431 (D009 Chassis)
• GA SPARES (ProKut): GAFCB2043RS (Verified B-prefix for D009 mount)
• OREGON: 203RNDD009 (PowerCut™) / 203VXLHD009 (VersaCut™)
• GB: LHL20-63HV, LHL2063HV (Lush)
• SUGIHARA: VT3U-3Q50-A, VT3U3Q50A (Light Type)

Detailed Specifications

• Tsumura Part Number: 428FK4 (Light & Tough Series)
• Bar Length: 20" (50cm)
• Pitch: 3/8"
• Gauge: .063" (1.6mm)
• Drive Link Count: 72 DL
• Mount Type: D009 (Husqvarna Large / 9mm Slot)
• Nose Type: 11-Tooth Replaceable Premium Sprocket Tip
• Construction: Resin-Filled Lightweight SKS-51 Japanese Steel

Comprehensive Fitment Guide

Note: Saws must be running a 3/8" Pitch drive sprocket and .063 Gauge chain (72 DL).

DOLMAR

• PS-6400, PS-6400H, PS-7300, PS-7310, PS-7900, PS-7910, PS-9000, PS-9010.

ECHO

• CS-7310P, CS-7310PW, CS-800, CS-8000, CS-8002.

EFCO

• MT 7200, MT 8200.

HUSQVARNA (Primary Fitment)

• Classic & 100 Series: 61, 62, 65, 66, 70, 77, 160, 162, 163, 180, 181, 185, 480 CD.
• 200 Series: 2100 CD, 2101, 260, 263, 266 XP, 268, 272 XP, 281 XP, 285, 288 XP, 298.
• 300 Series: 362 (9mm Stud), 365 XP, 371 XP, 372 XP, 380, 385 XP, 390 XP, 394 XP, 395 XP.
• 500 Series (Modern): 562 XP, 565, 570, 572 XP, 575 XP, 576 XP, 585, 592 XP.
• Industrial: 1100 CD, 3120 XP, Jungle 3120.

JONSERED

• 625, 630, 670, 2063, 2065, 2071, 2077, 2083, 2094, 2095, 2156, 2159, 2163, 2165, 2171, 2186, 2188.

MAKITA

• DCS6401, DCS7301, DCS7901, DCS9000, EA7300P, EA7900P.

PARTNER

• 550, 650, 7000, P-55, P-65, P-70, P-85, P-100, R-16, R-22, S-50, S-65.

POULAN / POULAN PRO

• 415, 425, 445, 475, 505, PP445, PP505, PP655.

SHINDAIWA

• 550, 575, 577, 680, 695, 757, 801, 901, 1091.

SOLO

• 603, 662, 665, 667, 670, 675, 681, 690, 694.

Why Choose Tsumura Lightweight Bars?

• Professional .063 Setup: Most 20" bars for this mount are .058. The 428FK4 allows operators to utilize the stronger .063 gauge chain, offering better rail stability and oil carry in abrasive conditions.
• Resin-Filled Rigidity: Unlike "hollow" lightweight bars, Tsumura's solid-body resin-filled notches dampen vibration from large 70cc+ engines while maintaining laser-straight accuracy in the cut.

SKS-51 Japanese Steel: Tsumura uses a proprietary heat-treatment process on the rails to ensure maximum wear resistance against Australia's hardest timbers.

Tsumura Light & Tough – Reduced Weight Guide Bar – D009 Mount
A genuine Japanese Tsumura Light & Tough – Reduced Weight guide bar built for serious cutting performance in Australian hardwood.
This reduced-weight version features staggered weight-reduction dove-tailed slots cut into the bar body and filled with high strength resin, lowering overall weight by approximately 20% while maintaining rigidity and rail durability.
Manufactured from a single piece of SKS-51 Japanese steel, this professional-grade guide bar is designed for demanding forestry, firewood and production cutting applications where reduced fatigue matters.

Technical Specifications
Mount: D009 – Husqvarna Large Bar Mount (9mm)
Pitch: 3/8"
Gauge Options: .058" (1.5mm) or .063" (1.6mm)
Construction: Solid SKS-51 Japanese steel with resin-filled weight reduction