BLADE,SCAG 21IN
Genuine Oregon OEM · Part number 91-638
The BLADE,SCAG 21IN is a genuine Oregon blades part, OEM part number 91-638. Dykes Motors sells it for $15.72. Specs: length 21 in, deck width 60 in, center hole 5/8 in. It is in stock to order online, or you can pick it up at our store. Not sure it fits your machine? Send the model and serial number to the parts desk before you order.
Price and availability checked
We accept Visa, Mastercard, American Express, Discover, Apple Pay, Google Pay, Amazon Pay, PayPal, Venmo, and Klarna.
In stock. Ships in 2 to 3 business days, arrives in 1 to 2 more — by Fri, Oct 23. Free shipping on every parts order. Free pickup at 3069 Hwy 49.
Genuine OEM part. Manufacturer warranty honored at our dealership.
Fits these models
1 more model in the OEM parts diagram, unverified
- Appears in the OEM parts diagram for Scag Scag (all models)
Replaces Oregon (OEP) OEP191-638 (probable)
Cross-reference / interchange numbers: 42180B*, 522829301*, 522936601*, WM142180B*, 539105711*, 20842S*, 5020842*, 5101755*, 5101755S*, 5020842S*, 5101755YP*, A48304*, 574481301*, SG608*, GDU10232*, TCU36515*, 101733*, 50170*, 60116*, 48111*, 481708*, 481712*, 482787*, 482879*, 482881*, 48304*, 17081*, 5103305S*, 5104045SYP*, 7017081*, 539109755*, 5101755BM*, 7075770BMA*, 7075770BZ*, 7075770YP*, 75770*, B1SC3802*, 340882*, 7075770*, 7073396YP* (+2 more)
* catalog cross-reference match, not yet human-verified — call to confirm before ordering off this number alone.
Details
Genuine Oregon mower blade, Oregon 91-638, a direct aftermarket replacement. Length 21 in. Center hole 5/8 in. Cutting width 2.5 in. Fits Scag SFZ6127BS, Scag SWZ651FSE, Scag STT5225CH, Scag STHM20KH, Scag STT61A22KA, Scag SW3613KH, Scag SWZ52V600FS, Scag SFZ4820FS and more. Ships nationwide from Dykes Motors, authorized Oregon dealer in Collins, Mississippi, or pick up free at our store.
Specifications
- Length: 21 in
- Deck Width: 60 in
- Center Hole: 5/8 in
- Blade Type: Mulching
Verify your fitment before you order
Text your equipment model and serial number to 601.516.7255 and we confirm the exact part before you pay. Prefer to talk? Call (601) 516-7255.
Questions about part 91-638
What machines does part 91-638 fit?
We do not list a confirmed fitment for part 91-638 on this page. Send the model and serial number of your machine to the parts desk and we will check it before you order.
How much is part 91-638?
Dykes Motors sells the BLADE,SCAG 21IN, part number 91-638, for $15.72. Price and availability were checked Oct 17, 2026.
Is part 91-638 a genuine Oregon part?
Yes. Part 91-638 is a genuine Oregon OEM part.
Is part 91-638 in stock?
Yes. It is in stock to order online, or you can pick it up at our store.
Fits the same machines
Visit Us in Collins, MS
3069 Hwy 49, Collins, MS 39428 · (601) 516-7255 · Get directions