Angle rings (i.e., a machine tool accessory) manufacturing · Connecticut

Supermill, LLC

Berlin, CT · ~21 workers · 4 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
4.5
Avg TCR
3.3
Industry avg
0
Fatalities
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The verdict

Supermill, LLC runs at 137% of its industry's injury rate - more dangerous than the typical Angle rings (i.e., a machine tool accessory) manufacturing workplace, earning a grade D.

Supermill, LLC: 4.5 TCR = 137% of Angle rings (i.e., a machine tool accessory) manufacturing BLS 3.3 · 4y Form 300A (see methodology below)

Supermill, LLC safety composite

Supermill, LLC scores strongest on fatalities (safer than 50% of same-industry peers) and weakest on dart rate (safer than 2%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

F

21/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 4.53 per 100 workers

Safer than 20% of industry peers

DART rate
F 7.97 per 100 workers

Safer than 2% of industry peers

Fatalities
D 0

Safer than 50% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

Rising injury rate

Supermill, LLC: 4.8 → 8.0 TCR

Peak year 2024 @ 8.0 TCR · DART/TCR 1.76× in 2024

Supermill, LLC's TCR rose 3.1 from 4.8 in 2020 to 8.0 in 2024. In 2024, DART was 1.76× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 333515 · Berlin, CT ABOVE-IND · SMALL

Grade D · TCR 4.5 · 137% of ind

  • DART 8.0 DART
  • RANK #6/7
  • PHOTO Berkshire Precision …
  • BOOK 4y book
  • INJ 4 inj
  • SIZE ~21 FTE

Nearest TCR peer: Berkshire Precision Tool, LLC (0.0 TCR gap)

Read with this employer → · Industry book → · Connecticut employers → · Look up another →

Supermill, LLC in the TCR neighbourhood

Average Total Case Rate among this establishment and nearest same-industry peers

TCR

What this shows Supermill, LLC averages 4.5 TCR (137% of the Angle rings (i.e., a machine tool accessory) manufacturing BLS benchmark).

Source U.S. Department of Labor, OSHA Injury Tracking Application (Form 300A) As of 2026-08-25

Supermill, LLC TCR series: 2020=4.8 · 2021=5.3 · 2023=0 · 2024=8 · BLS 3.3

Where Supermill, LLC falls in its industry

221 Angle rings (i.e., a machine t establishments

Safer than 20% of graded establishments in this industry, whose median TCR is 2.5.

More dangerous than peersSafer than peers

Narrower to Connecticut alone (the establishments it most directly competes with for workers and contracts): ranked #6 safest of 7 Angle rings (i.e., a machine t employers in Connecticut.

Supermill, LLC (21 employees, TCR 4.5) among 29 same-industry peers, split at the industry median of 71 employees and a TCR of 2.5 2×2 strategic matrix plotting 30 entities by Average employees (X) and Total Case Rate (Y), with a crosshair dividing the plot into four quadrants. Larger & higher-riskSmaller & higher-riskLarger & saferSmaller & safer than peers 0200400600 051015 Average employees Total Case Rate Supermill, LLC
Supermill, LLC (21 employees, TCR 4.5) among 29 same-industry peers, split at the industry median of 71 employees and a TCR of 2.5

Supermill, LLC has fewer employees than the Angle rings (i.e., a machine tool access median and a higher injury rate than the industry's median TCR of 2.5. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year TCR DART Injuries Illnesses Fatalities
2024 8.0 8.0 2 0 0
2023 0.0 0.0 0 0 0
2021 5.3 0.0 1 0 0
2020 4.8 4.8 1 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

333515 · CT · Berlin

221 Angle rings (i.e., a machine tool accessory) manufacturing employers nationwide with a credible TCR · 7,008 rated employers in Connecticut with headcount on file · 71 employers in Berlin, CT · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel Establishment Metric
NAICS-TCR Berkshire Precision Tool, LLC 4.5 TCR
NAICS-TCR Milwaukee Broach 4.5 TCR
NAICS-TCR ARCH Cutting Tools - Rhode Island, LLC 4.6 TCR
NAICS-TCR BMS Acucut LLC 4.4 TCR
STATE-SIZE Milford Power Company LLC 21 FTE
STATE-SIZE E&N Associates, LLC 21 FTE
STATE-SIZE Epifano Builders Inc. 21 FTE
STATE-SIZE NA-US-CT-East Granby-International Drive 21 FTE
CITY-NEAR Eversource - Berlin 1,244 FTE
CITY-NEAR 12121 485 FTE
CITY-NEAR 222 New Park Dr 469 FTE
CITY-NEAR Corbin Russwin 337 FTE
NAT-TCR Tricare Medical Transporation LLC 4.5 TCR
NAT-TCR Alamo Lumber Company 4.5 TCR
NAT-TCR Jshop & West Tenn Structures 4.5 TCR
NAT-TCR The Landings of Cabarrus 4.5 TCR
NAT-SIZE JP Thomas & Co. Inc (ADM Corporate Headquarters) 21 FTE
NAT-SIZE Mansfield 21 FTE
NAT-SIZE A & P Farms 21 FTE
NAT-SIZE Americold Logistics - Henderson 21 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2024, 2023, 2021, 2020. This is publicly available government data - not a legal determination of workplace conditions.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from official public datasets. See our methodology for details.