Short answer: An Andersen 400 Series Woodwright double-hung interlock is not the same part location as a Wood Casement head-jamb seal or a Wood Casement sash-bottom seal. The Woodwright parts drawing separates upper and lower meeting/interlock positions; Andersen's Wood Casement listings name two different positions on a hinged-window assembly. Treat the system, window generation and contact location as your first three identification fields. No cross-family interchange is established. [A1–A3]
The three places people confuse
| What you actually see | First identification question | What the cited manufacturer material identifies | What it does not prove |
|---|---|---|---|
| Upper or lower Woodwright double-hung sash at its interlock | Is this the upper or lower sash; what is the product ID and date? | The Woodwright 2002–present parts catalog depicts upper and lower weatherstrip interlocks separately, printed p.17. [A1] | That one generation's lineal/interlock is a replacement for another generation. |
| Bottom rail of a Wood Casement sash | Is the flexible member carried on the moving sash bottom? | Part 0575012 has an issuer listing for a bottom-rail weatherstrip within the stated W-size Wood Casement context. [A2] | That it works on a Woodwright, other casement sizes or unknown frames. |
| Fixed head jamb of a Wood Casement | Does the part belong to the head of the fixed frame instead? | Part 0574512 has an issuer listing for a head-jamb weatherstrip within the stated Wood Casement context. [A3] | That it is a bottom-rail substitute or an exact fit for any unlabelled opening. |
Stop at the operating type. If both sashes slide vertically, follow the Woodwright interlock branch. If a sash swings on hinges, the Wood Casement branch may be relevant, but hinges alone do not identify the exact Andersen product line. If the operating type or product label is unclear, choose MODEL_NOT_IDENTIFIED, not a part number.
Location map: record where the strip actually sits
For a double-hung window, label upper sash, lower sash and meeting/interlock joint. Observe the faces when the window is in an ordinary safe opening position. For a casement, label moving sash bottom rail and fixed frame head jamb as separate positions. Your note should show the strip's host member, not merely the room side from which a photo was taken.
A strip found loose on a sill is not enough to say where it came from. Likewise, a photo cropped down to a pale flexible bulb can make a sash-bottom seal and head-jamb seal appear deceptively similar. The identifying evidence is the surrounding joinery, retention interface, product ID and dated parts diagram.
Six-photo evidence worksheet
Keep a short folder named for the window, not the proposed part (kitchen-east-window, for example). Photograph without removing glass, balance covers, trim, stops or retention hardware.
- Whole opening, closed: both vertical members or the hinge arrangement in frame; include a simple location label.
- Whole opening, safely open: show the moving member and stationary frame. Do not force a sash that binds.
- Original identity: readable product label, invoice or service paperwork, if accessible without disassembly. Transcribe exact text; write
PRODUCT_ID_UNKNOWNif absent. - Contact location: a medium-range photo with an arrow to
upper interlock,lower interlock,sash bottom, orhead jamb. If uncertain, useLOCATION_UNCONFIRMED. - Receiver and profile: square-on close-up with a scale beside the undisturbed seal, showing whether it is seated in a channel. Never cut an end, tug out a brittle strip or scrape paint solely to identify it.
- Symptom and condition: whether the strip is dislodged, abraded or visibly missing, and whether the sash binds or has an observable gap. Record the location; a draft alone does not establish a defective seal.
| Worksheet field | Entry to record | Example of an honest unknown |
|---|---|---|
| Window operating type | Vertical double-hung / hinged casement / other | OPERATING_TYPE_UNCLEAR |
| Maker, series and manufacture era | Label or dated document, not appearance | SERIES_UNKNOWN |
| Seal host and position | Upper/lower interlock, sash bottom, head jamb | POSITION_UNCONFIRMED |
| Original part / service reference | Exact recorded code plus source | NO_ORIGINAL_CODE |
| Mounting interface | Visible groove, retained profile, other | RECEIVER_NOT_VISIBLE |
| Measured object and units | Which surface or undisturbed piece was measured | NO_SAFE_DIMENSION |
Do not enter a generic window opening width as the seal's ordering dimension. If taking a measurement, label whether it is a frame, sash, installed strip or already loose sample. A worn strip's compressed height may not reflect the maker's nominal geometry.
The Woodwright date/generation trap
The cited 2002–present Woodwright parts catalog, with 9/1/26 footer in the reviewed copy, distinguishes upper and lower interlocks. Its service material at printed p.82 includes historical lower-interlock versions, including a December 2007–February 21, 2018 lineal reference. A modern diagram and an older sash can therefore coexist in an online search without representing the same service part. The catalog requests the product-label product ID for made-to-order interlock work. [A1]
That is the key decision: a dated parts page is useful only after matching the installed product identity and manufacturing window. Never assume that a Wood Casement listing with a similar W label or profile photograph is a Woodwright interlock. No family-wide W suffix equivalence is established here.
What to send when asking for the replacement
Send the six photos plus a concise question: “This is the [identified line and date, or unknown], and the seal is at [documented member and position]. Does the current manufacturer service drawing identify the correct upper/lower interlock or sash-bottom/head-jamb component for this exact product ID? Is there a dated replacement or supersession notice?”
Request the exact drawing revision, part number, any required dimensions and the service method appropriate to the model. Keep a copy of the answer beside the field observations. If the line or position cannot be established, record NO_CONFIRMED_REPLACEMENT. A visible draft, color match or generic strip length does not justify placing an order.
Frequently asked questions
Can 0575012 replace a Woodwright lower interlock? Not on the cited evidence. Andersen names 0575012 for a specified Wood Casement sash-bottom location; the Woodwright parts drawing concerns a different operating system. [A1][A2]
Are 0575012 and 0574512 interchangeable? This article establishes two different named locations, not interchangeability. Check the complete current issuer listing and the actual casement label. [A2][A3]
What if the Woodwright sash date is unknown? Preserve any original code, photograph upper and lower contact areas separately and ask Andersen to identify the catalog generation from the product label or service records. Do not fit a later interlock on the basis of one photo.
Can I remove the seal for a better cross-section? Do not remove brittle, glued, painted-over or structurally trapped parts just to improve an identification picture. If an existing loose offcut is available, it can be photographed separately with its provenance stated.
Evidence and boundaries
- [A1] Andersen, 400 Series Woodwright Double-Hung Windows (2002 to Present) Parts Catalog, reviewed copy footer 9/1/26, printed pp. 17 and 82; upper/lower interlock and historical service-lineal descriptions. Manufacturer PDF. These page references are inherited from the frozen W410 source/QC ledger, not a claim of a new verification in this worker run.
- [A2] Andersen Parts, 0575012, Bottom Rail Weatherstrip – Size W – Wood Casement, undated issuer product listing, specified Wood Casement context. Manufacturer listing.
- [A3] Andersen Parts, 0574512, Head Jamb Weatherstrip – Size W – Wood Casement, undated issuer product listing, specified Wood Casement context. Manufacturer listing.
Not established: fit to any reader's exact model, W-size suffix crossover, installation procedure, inventory, warranty, performance, tested rating or current supersession. If closing/latching, a required escape opening or specialist glazing is involved, use authorized service and preserve normal operation.