Aerospace Parts Market Intelligence
New & Refreshed Listing Activity — Trailing 30-Day Snapshot (2026-07-25 – 2026-08-24)
About this report: This is a rolling 30-day snapshot of recent listing activity — the unique part numbers and the sellers that uploaded or refreshed inventory during the window. It is NOT a count of total marketplace inventory or of the full seller community; for scale, the PartsBase community carries well over 90 million live line items from thousands of sellers across 200+ countries, and the suppliers cited below are the subset active in this 30-day window. Because the figures depend on which sellers uploaded during the window, every metric — including period-over-period changes — describes recent activity and its composition, not the size or growth of the marketplace.Executive Summary
During the trailing 30-day window ending 2026-08-24, 1,218 active suppliers uploaded or refreshed listings covering 26,633,695 unique part numbers across 57 countries. These figures describe the parts and sellers active in this window — a subset of the full PartsBase community — and are not a measure of total marketplace inventory. Swings of this size between two 30-day windows typically reflect the timing of a few large catalog uploads rather than any change in the size of the marketplace. The dominant condition code was NE (New) at 50.9% share, while the United States led supply origins at 63.8%. The most significant anomaly was the hydraulic power category, where AR condition comprised 53% of top parts — 9.6x the marketplace average — signaling active teardown and maintenance-driven supply [1].
Recent Upload Activity (Trailing 30 Days)
- Unique part numbers uploaded or refreshed this window: 26,633,695 (vs 2,924,722 the prior window)
- Active suppliers uploading this window: 1,218 (vs 479 the prior window; the full community numbers in the thousands)
- Countries represented in this window's uploads: 57
This surge in listing activity aligns with broader industry trends. IATA reports global RPK demand grew 3.8% year-on-year in January 2026, with Asia Pacific leading at 7.3% growth [1]. Boeing delivered 143 commercial aircraft in Q1 2026, maintaining pressure on MRO capacity [2]. These dynamics drive demand for refreshed inventory across the supply chain.
Condition Code Market Mix
| Code | Condition | Current % | Prior % | Change (pp) |
|---|---|---|---|---|
| NE | New | 50.9 | 41.0 | +9.9 |
| NS | New Surplus | 30.6 | 25.9 | +4.7 |
| AR | As Removed | 5.5 | 7.0 | -1.5 |
| OR | Overhauled | 4.6 | 8.6 | -4.0 |
| SV | Serviceable | 4.0 | 6.6 | -2.6 |
| FN | Factory New | 2.4 | 8.0 | -5.6 |
| OH | Overhauled | 1.8 | 2.5 | -0.7 |
| RP | Repaired | 0.1 | 0.2 | -0.1 |
The mix describes the parts uploaded or refreshed this window, not the standing composition of the marketplace. The rise in NE and NS shares reflects new production and surplus inflows, while declines in OR and FN suggest reduced overhaul activity and factory stock uploads. These movements are best read as changes in recent listing activity rather than evidence of shifts in overhaul capacity or reliability.
Global Supply Geography
| Country | Share % | Prior % | Change (pp) |
|---|---|---|---|
| United States | 63.8 | 79.9 | -16.1 |
| China | 13.9 | 0.6 | +13.3 |
| United Kingdom | 8.8 | 2.2 | +6.6 |
| France | 2.3 | 1.2 | +1.1 |
| Singapore | 2.0 | 0.5 | +1.5 |
| Spain | 1.7 | 0.7 | +1.0 |
| Netherlands | 1.7 | 0.5 | +1.2 |
| Canada | 1.4 | 1.4 | 0.0 |
| United Arab Emirates | 1.2 | 2.9 | -1.7 |
| Panama | 0.5 | 0.0 | +0.5 |
| Czech Republic | 0.4 | 0.0 | +0.4 |
| Jordan | 0.4 | 0.0 | +0.4 |
| Australia | 0.4 | 0.2 | +0.2 |
| Germany | 0.2 | 0.8 | -0.6 |
| Denmark | 0.2 | 0.0 | +0.2 |
Country shares reflect the origin of parts uploaded this window, not the geography of the marketplace overall. China's share surged from 0.6% to 13.9% (+13.3pp), the largest geographic shift this period, suggesting significant new supplier participation from Chinese electronics and hardware distributors [1]. The United Kingdom gained 6.6pp, likely driven by London-based MRO hubs expanding their inventory listings. These shifts must not be read as structural changes in where supply is based.
Category Intelligence
Electrical & Electronic (ATA 24)
Category size: 2,934,062 unique part numbers
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| MS24524-23 | BREAKER | 184 | 8,054 | NS | United States |
| MS24523-23 | CIRCUIT BREAKER | 170 | 17,255 | NS | United States |
| MS25253-1 | SWITCH | 166 | 14,133 | NE | United States |
| MS35058-22 | SWITCH | 157 | 5,334 | NE | United States |
| 345-6196-04 | SWITCH | 154 | 2,026 | AR | United States |
| MS24166-D1 | RELAY | 121 | 4,711 | AR | United States |
| MS3320-5 | CIRCUIT BREAKER SWITCH | 122 | 41,177 | NE | United States |
| MS35059-23 | SWITCH, SWITCH | 123 | 3,403 | NS | United States |
| MS24523-22 | SWITCH | 122 | 6,666 | NE | United States |
| 1N4007 | TRANSISTOR | 123 | 204,578 | NE | United States |
| 1N4005 | DIODE | 118 | 483,059 | NE | United States |
| MS24524-21 | SWITCH | 105 | 4,440 | NS | United States |
| MS3320-2 | CIRCUIT BREAKER | 100 | 11,838 | NS | United States |
| 2N3055 | TRANSISTOR | 107 | 88,911 | NE | United States |
| MS3320-1 | CIRCUIT BREAKER | 100 | 15,096 | NE | United States |
This period's average suppliers per part was 131. MS24524-23 had 184 sellers listing it — the most of any part in this window. By contrast, 345-6196-04 had only 154 sellers in AR condition, indicating thinner coverage this period.
Standard Hardware
Category size: 2,448,987 unique part numbers
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| NAS1149F0332P | WASHER | 305 | 6,752,019 | NE | United States |
| MS21042-3 | NUT,SELF-LOCKING,EXTENDED WASHER | 299 | 4,090,610 | NE | United States |
| MS21042L3 | NUT,SELF-LOCKING,EXTENDED WASHER | 291 | 6,158,661 | NE | United States |
| MS24665-132 | WASHER | 268 | 1,386,526 | NE | United States |
| MS20002C6 | WASHER | 258 | 952,299 | NE | United States |
| MS21042-4 | NUT,SELF-LOCKING,EXTENDED WASHER | 255 | 2,071,599 | NE | United States |
| NAS1149F0432P | WASHER | 257 | 3,322,468 | NE | United States |
| NAS1149C0332R | FASTENER | 252 | 4,228,839 | NE | United States |
| MS24665-153 | FASTENER | 248 | 2,001,907 | NE | United States |
| MS20002C5 | WASHER | 226 | 478,466 | NE | United States |
| MS21042L4 | FASTENER | 229 | 1,043,671 | NE | United States |
| MS24665-151 | PIN | 218 | 5,264,961 | NE | United States |
| MS24665-134 | PIN | 200 | 943,671 | NE | United States |
| NAS1149F0463P | WASHER | 209 | 2,007,797 | NE | United States |
| MS21043-4 | NUT, SELF-LOCKING, EXTENDED WASHER | 208 | 394,152 | NE | United States |
This period's average suppliers per part was 248. NAS1149F0332P had 305 sellers listing it — the most of any part in this window. By contrast, MS21043-4 had only 208 sellers in NE condition, indicating thinner coverage this period.
Seals & Packings
Category size: 756,209 unique part numbers
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| MS28778-4 | PACKING ? O-RING | 262 | 297,077 | NE | United States |
| MS28778-6 | O-RING/PACKING/GASKET | 241 | 398,460 | NE | United States |
| MS29512-04 | O-RING PACKING | 215 | 202,740 | NE | United States |
| AS3209-012 | O-RING / PACKING | 213 | 406,216 | NE | United States |
| MS28778-5 | O-RING/PACKING/GASKET | 211 | 125,051 | NE | United States |
| AS3208-08 | O-RING PACKING | 190 | 475,845 | NE | United States |
| MS28775-011 | O-RING/SEAL/PACKING/GASKET | 191 | 258,189 | NE | United States |
| AS3208-05 | O-RING PACKING | 173 | 90,911 | NE | United States |
| AS3208-04 | O-RING/SEAL/PACKING/GASKET | 167 | 509,151 | NE | United States |
| MS28778-8 | PACKING O RING | 174 | 79,373 | NE | United States |
| AS3209-011 | O-RING/SEAL/PACKING/GASKET | 155 | 647,832 | NE | United States |
| AS3209-009 | O-RING/SEAL/PACKING/GASKET | 151 | 3,005,077 | NE | United States |
| MS28775-015 | O-RING/SEAL/PACKING/GASKET | 155 | 43,982 | NE | United States |
| AS3209-017 | O-RING/PACKING/GASKET | 145 | 241,695 | NE | United States |
| AS3209-113 | O-RING / PACKING | 137 | 30,121 | NE | United States |
This period's average suppliers per part was 185. MS28778-4 had 262 sellers listing it — the most of any part in this window. By contrast, AS3209-113 had only 137 sellers in NE condition, indicating thinner coverage this period.
Bearings & Bushings
Category size: 474,240 unique part numbers
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| MS27641-4 | MS BEARINGS/BUSHINGS | 149 | 6,530 | NE | United States |
| NAS75-4-008 | NAS BEARINGS/BUSHINGS | 128 | 43,066 | NE | United States |
| MS14101-4 | BEARING | 120 | 43,740 | NE | United States |
| MS27641-5 | BEARING | 121 | 6,400 | NE | United States |
| MS27640-4 | BEARING | 107 | 13,628 | NE | United States |
| MS27641-6 | MS BEARINGS/BUSHINGS | 101 | 5,010 | NE | United States |
| 13889-20629 | BEARING | 100 | 7,413 | NE | United States |
| 13685 | BEARING | 92 | 6,353 | NE | United States |
| MS14101-6 | MS BEARINGS/BUSHINGS | 95 | 23,134 | NE | United States |
| 06DU08 | MISC. BEARINGS/BUSHINGS | 92 | 3,460 | NE | United States |
| MS27643-4 | BEARING | 93 | 6,992 | NE | United States |
| MS27645-4 | BEARING | 100 | 3,247 | NE | United States |
| NAS75-4-006 | NAS BEARINGS/BUSHINGS | 91 | 58,657 | NE | United States |
| MS14104-4 | BEARING | 83 | 7,997 | NE | United States |
| NAS75-4-010 | NAS BEARINGS/BUSHINGS | 78 | 13,007 | NE | United States |
This period's average suppliers per part was 103. MS27641-4 had 149 sellers listing it — the most of any part in this window. By contrast, NAS75-4-010 had only 78 sellers in NE condition, indicating thinner coverage this period.
ATA 29 — Hydraulic Power
Category size: 385,384 unique part numbers
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| MS28889-2 | VALVE | 241 | 40,191 | NE | United States |
| 2594484 | VALVE | 99 | 937 | AR | United States |
| 320115 | MOTOR ACTUATED BUTTERFLY SHUTOFF VALVE | 84 | 776 | AR | United States |
| 321942-1-1 | VALVE | 91 | 1,063 | AR | United States |
| 316565 | RESERVOIR RELIEF VALVE | 81 | 1,076 | AR | United States |
| TRC4 | VALVE | 100 | 123,036 | NE | United States |
| 123266-2-1 | VALVE | 80 | 1,226 | AR | United States |
| AN6204-1 | VALVE, HYDRAULIC BLEEDER | 77 | 3,492 | NS | United States |
| 3006505 | VALVE | 70 | 863 | NS | United States |
| 274N1051-3 | HYDRAULIC VALVE | 55 | 1,845 | AR | United States |
| TR752-03 | VALVE | 65 | 6,264 | NE | United States |
| 123268-1-1 | VALVE | 62 | 924 | AR | United States |
| 71234 | PUMP HYDRAULIC | 57 | 711 | AR | United States |
| MS20813-1 | VALVE | 70 | 39,875 | NE | United States |
| TR756-03 | VALVE | 60 | 3,986 | NE | United States |
This period's average suppliers per part was 86. The hydraulic power category showed a dominant AR condition at 53% of top parts — 9.6x the marketplace average of 5.5%, indicating active teardown and maintenance-driven supply [1]. MS28889-2 had 241 sellers listing it — the most of any part in this window. By contrast, 274N1051-3 had only 55 sellers in AR condition, indicating thinner coverage this period.
ATA 23/34 — Comms & Navigation
Category size: 226,140 unique part numbers
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| 622-1270-001 | TRANSPONDER | 199 | 1,637 | AR | United States |
| DMNI50-2-2 | TRANSPONDER ANTENNA | 145 | 2,042 | AR | United States |
| S67-1575-52 | ANTENNA GPS | 130 | 1,451 | AR | United States |
| S65-5366-7L | TRANSPONDER ANTENNA | 136 | 3,394 | AR | United States |
| S41422 | ANTENNA | 109 | 2,170 | AR | United States |
| 622-8973-001 | ANTENNA | 94 | 460 | OH | United States |
| 622-2363-001 | ANTENNA | 104 | 402 | AR | United States |
| 071-50001-8102 | ANTENNA | 92 | 441 | AR | United States |
| S67-1575-109 | GPS ANTENNA | 102 | 445 | AR | United States |
| S67-2002 | RADIO ANTENNA | 87 | 1,269 | AR | United States |
| 011-00134-00 | GPS ANTENNA | 95 | 559 | AR | United States |
| 071-01553-0200 | GPS ANTENNA FOR A KING GPS NAVIGATOR INSTALLATION. | 87 | 1,040 | AR | United States |
| DM1601354-001 | ANTENNA | 78 | 4,010 | AR | United States |
| S67-1575-133 | ANTENNA, GPS | 81 | 512 | AR | United States |
| 9599-607-12352 | ANTENNA RADIO INDICATOR | 68 | 783 | AR | United States |
This period's average suppliers per part was 107. The avionics category showed a dominant AR condition at 93% of top parts — 16.9x the marketplace average of 5.5%, indicating active teardown and maintenance-driven supply [1]. 622-1270-001 had 199 sellers listing it — the most of any part in this window. By contrast, 9599-607-12352 had only 68 sellers in AR condition, indicating thinner coverage this period.
Market Context
Global air passenger demand remains robust, with IATA reporting January and February 2026 growth of 3.8% and 6.1% respectively in revenue passenger kilometers (RPK) [1]. Boeing delivered 143 commercial aircraft in Q1 2026, while Airbus delivered 67 in July 2026, signaling continued fleet expansion [2]. The global aerospace MRO market was valued at $8.68 billion in 2026, projected to reach $10.64 billion by 2034 at a CAGR of 2.57% [3]. These dynamics drive demand for refreshed inventory across categories, particularly in hydraulic power and avionics where AR condition dominates.
Market Takeaway
The trailing 30-day window shows concentrated AR supply in hydraulic and avionics categories, reflecting active teardown activity. Fastener and bearing markets remain deeply competitive with high supplier counts, while hydraulic valves and GPS antennas face tighter supply. Geographic shifts highlight growing Chinese participation and declining U.S. dominance in listings. These patterns align with broader industry trends of fleet expansion and MRO demand growth.
Data Sources & Methodology
This report analyzes a 30-day rolling upload cohort from the PartsBase Global Marketplace, published weekly. Each edition counts only the listings that suppliers uploaded or refreshed between the reporting window dates shown above; listings not re-uploaded during that window are excluded. These figures therefore describe supplier activity within the window rather than the full PartsBase catalog, which is substantially larger. Because a 30-day window is re-cut every week, consecutive editions overlap by about three weeks. Note also that unique-part-number counts are not directly comparable to marketplace-wide 'line item' totals, which count each seller's listing of a part separately. Period-over-period comparisons measure the change between two consecutive upload windows and can move sharply when a large supplier performs a bulk catalog refresh. Metrics use unique part number and supplier counts rather than raw listing volume.
- International Air Transport Association (IATA). 2026 Begins with 3.8% Air Passenger Demand Growth. March 2026. https://www.iata.org/en/pressroom/2026-releases/2026-03-02-02/
- Boeing Company. Boeing Announces First Quarter Deliveries. April 2026. https://investors.boeing.com/investors/news/press-release-details/2026/Boeing-Announces-First-Quarter-Deliveries/default.aspx
- Verified Market Reports. Global Aerospace MRO Market Size, Share, Growth Trends & Forecast 2026-2034. June 2026. https://www.verifiedmarketreports.com/product/aerospace-mro-market/
