CNC milling for Renton, WA. RivCut supplies CNC milling to engineering and manufacturing teams across Renton and the Pacific Northwest and nearby Everett, Auburn, Kent, and Seattle. Parts are machined 100% in the USA at our Union City, California facility and reach Renton in about 3–4 business days by ground freight — with expedited air and AOG options when a production line is down.
Renton is home to Boeing's 737 MAX final assembly line — the world's highest-volume commercial jet production facility. Every Renton order ships with CMM inspection, full material traceability, and a first-article report on request.
profile tolerance
in commercial aviation
via I-5 (830 mi)
at Renton factory
What Is CNC Milling for Renton's 737 MAX Program?
CNC milling for the Boeing Renton Factory is a narrow-body, high-rate discipline. The factory at 737 Logan Ave N runs three assembly lines at 38–42 aircraft/month — the world's highest-rate commercial jet production. Every 737 MAX has ~400,000 individual parts, and repeatable milling of fuselage frames, shear ties, wing spar caps, and engine pylon brackets drives the majority of machining demand in the King County supply chain. RivCut machines to Boeing D6-17487 narrow-body process specifications and D1-9000-1 AQS, and handles P-8 Poseidon ITAR work under a registered chain of custody. Our 5-axis mills produce the envelope and the tolerance story that Renton 737 suppliers need — in the alloys they specify.
Narrow-Body Tolerances
±0.005" on 2024-T3 fuselage frame profiles. ±0.0005" on Ti-6Al-4V pylon bore diameters. ±0.003" on 7150-T77511 wing spar cap web thickness. CMM on every feature, every lot.
737 MAX Alloys
2024-T3/-T351 fuselage frames, 7075-T6 stringers and clips, 7150-T77511 spar caps, Ti-6Al-4V AMS 4928 pylon brackets, 4340 steel landing gear trunnions, 7050-T7451 keel-beam fittings.
Boeing D6-17487 Workflow
Narrow-body-specific engineering process documentation alongside D1-9000-1 AQS and AS9102 FAIR packages. ITAR-registered chain of custody built in for P-8 Poseidon defense work.
Narrow-Body Milling Part Types
The signature parts that keep the Boeing Renton 737 MAX line moving — milled to narrow-body tolerances with full Boeing documentation.
In Renton, Boeing's three-line assembly cadence drives continuous demand for 5-axis milling. Local teams at the Renton Factory, Exotic Metals Forming on E Valley Rd, GKN Aerospace Auburn, and Safran Landing Systems rely on precision-milled structural fittings, fuselage frames, and spar caps to hold the 737 MAX program on rate.
P-8 Poseidon defense programs at the same Renton facility pull a separate ITAR-controlled machining demand profile — U.S.-person-only handling on all P-8 structural and systems hardware — that we support with ITAR-registered process controls faster than most Puget Sound Tier-2 shops can offer.
2024-T3 Fuselage Frames
5-axis milled fuselage frames and shear-tie sections to ±0.005" profile. MIL-DTL-5541 Type I/II Alodine 1200S corrosion protection coordinated through NADCAP processor. AS9102 FAIR on first articles.
2024-T3/-T3517150-T77511 Wing Spar Caps
Highest-strength aluminum in commercial aviation. Spar cap profile milling with ±0.003" web thickness tolerance. MMPDS-2024 allowables and AMS 2770 heat-treat traceability on every shipment.
7150-T77511Ti-6Al-4V Pylon Brackets
Engine pylon attach fittings and nacelle mounting brackets in Ti-6Al-4V AMS 4928. 5-axis milled, ±0.0005" on bore diameters, Rz ≤32 µin on sealing faces. Supports Exotic Metals Forming pylon supply chain.
Ti-6Al-4V AMS 4928P-8 Poseidon ITAR Components
ITAR-controlled structural and systems machined parts for the US Navy P-8 maritime patrol aircraft. U.S.-person-only handling, ITAR-registered chain of custody, Boeing D1-9000-1 documentation throughout the full order lifecycle.
ITAR / P-8 Poseidon4340 Steel Landing Gear Pins
4340 steel landing gear trunnion pins, drag-brace pins, and side-brace pins for the 737 MAX landing gear system. Machined to Safran landing-gear supply spec tolerances, hard-chrome plated, Rc 54–58 after heat treat.
4340 / 4130 Steel7050-T7451 Keel Beam Fittings
Heavy structural fittings and keel beam clips in 7050-T7451 for 737 MAX lower fuselage structure. Plate envelope milling with MIL-A-8625 Type II anodize. Boeing Fabrication Auburn-style documentation flow.
7050-T7451
737 MAX Fuselage Frame — 2024-T3
Milled as a first-article shear-tie frame for a 737 MAX -8 fuselage section. Delivered to Boeing Renton receiving dock in 7 business days with a complete AS9102 FAIR package and full MIL-DTL-5541 Alodine 1200S corrosion-protection documentation.
tolerance
surface finish
Renton dock
corrosion protection
- CMM report per Boeing D1-9000-1 AQS supplier documentation
- 2024-T3 mill cert, AMS 2770 heat-treat lot traceability
- AS9102 Rev C first-article inspection (FAIR) package
- NDA-protected, ITAR-compliant project handling
Tolerances. Alloys. Documentation.
Three narrow-body 737 constraints, baked into every Renton CNC milling order.
5-Axis Narrow-Body Capability
Single-setup machining for fuselage frames, spar caps, and pylon brackets.
- ±0.005" fuselage frame profiles
- ±0.0005" pylon bore diameters
- ±0.003" wing spar cap web thickness
- 3-, 4-, and 5-axis on one floor
Verified Quality — CMM Every Order
Every 737 supplier part is CMM verified before it leaves the floor.
- CMM output per Boeing D1-9000-1 AQS
- NIST-traceable calibrated gauges
- AS9102 Rev C FAI package included
- MMPDS-2024 material allowables
Boeing 737 Documentation Stack
Renton 737 buyers expect this on day one of an RFQ.
- AS9100D quality management
- Boeing D1-9000-1, D6-82479, D6-17487
- MIL-DTL-5541 / MIL-A-8625 finishing
- ITAR-registered P-8 handling
From CAD File to Boeing Renton in Days
Three steps. D6-17487 narrow-body-spec fluent. Built for the 737 program cadence.
Upload CAD or 737 MBD Release
Send a STEP, IGES, or 737-compatible MBD file. Specify alloy (2024-T3, 7150-T77511, Ti-6Al-4V, 4340), axis count, and any NADCAP-processed finishes. For P-8 ITAR work, request registered handling before uploading controlled drawings.
We 5-Axis Mill & CMM Verify
Your fuselage frame, spar cap, pylon bracket, or P-8 component runs on our 3-, 4-, or 5-axis mills. CMM output is tied to your release model. AS9102 FAIR, heat-lot trace, and D6-17487 process documentation on every deliverable.
Ship to Boeing Renton
LTL via I-5 reaches Renton in 1 business day from Union City, CA. Schedule-at-risk? SFO to BFI (Boeing Field) same-day via Alaska Air Cargo. First article, CMM report, and material cert ship with every lot.
Why Renton, WA Companies Choose RivCut for CNC Milling
Renton's milling demand is sized by the 737 MAX program, not by generic job-shop parts. The Boeing Renton Factory runs three assembly lines at 38–42 aircraft/month. Every 2024-T3 fuselage frame, every 7150-T77511 wing spar cap, every Ti-6Al-4V pylon bracket must be milled to narrow-body tolerances with Boeing D6-17487 narrow-body-specific documentation. Add P-8 Poseidon ITAR-controlled machining demand, and Renton CNC milling is a high-rate, high-documentation discipline that requires a dedicated second source. RivCut machines into that demand from Union City, CA with 5-axis capability, AS9100D + NADCAP chem-processing, Boeing D1-9000-1 documentation, and a truck lane that lands parts at 98057 in one business day.
All parts are CNC machined in-house at our Bay Area shop. We never broker or outsource. Learn about RivCut →
Common Questions About CNC Milling in Renton
CNC Milling Near Renton
Built for the Boeing Renton Factory's Narrow-Body Milling Demand
Renton's milling demand is sized by the 737 MAX program, not by generic job-shop parts. The Boeing Renton Factory at 737 Logan Ave N runs three assembly lines at 38–42 aircraft/month. Every 2024-T3 fuselage frame, every 7150-T77511 wing spar cap, and every Ti-6Al-4V pylon bracket must be milled to tight narrow-body tolerances with Boeing D6-17487 narrow-body-specific process documentation. The P-8 Poseidon adds ITAR-controlled machining demand on top of that. Exotic Metals Forming on E Valley Rd forms titanium and nickel superalloy pylon and nacelle parts less than 0.8 miles from the factory gate — machined interfaces and finish-machine of EMF-formed titanium deliverables are a steady demand stream. GKN Aerospace in Auburn (12 mi south) supplies 737 fuselage stringers and frames that flow north to Renton. Safran Landing Systems drives 4130/4340 steel landing gear pin machining across the King County corridor. RivCut machines into all of this demand from Union City, CA with 5-axis capability, AS9100D + NADCAP chem-processing, Boeing D1-9000-1 AQS documentation, and a truck lane that lands parts at 98057 in one business day.
Upload Your CNC Milling CAD File for Renton
737 MAX fuselage frames. Wing spar caps. Ti-6Al-4V pylon brackets. P-8 Poseidon ITAR hardware. Quote in hours.
No minimums · AS9100D · Boeing D1-9000-1 · D6-17487 narrow-body process spec · Ships to 98057 next day