# Crosby HR-125 / HR-125M swivel hoist rings: bolt size, working load limit, torque and frame dimensions, 800 to 100 000 lb and M8 to M48

> What are the dimensions, bolt size, torque and working load limit of a Crosby HR-125 swivel hoist ring?

- Category: Hardware › Rigging & lifting
- Kind: Standard part
- Basis: Crosby's HR-125 (UNC) data sheet and a copy of its HR-125M (metric) sheet, read in this session; numbers only (the sheet's drawing letters are not defined in text)
- Page: https://xemstudio.com/objects/hoist-rings-crosby-hr-125/ · JSON: https://xemstudio.com/api/geometry?object=hoist-rings-crosby-hr-125 · Plain text: https://xemstudio.com/objects/hoist-rings-crosby-hr-125/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- A swivel hoist ring bolts into a tapped hole in the load and gives a bail that pivots 180° and swivels 360° for lifting at an angle. Inch rows are the HR-125 UNC sheet exactly as printed (WLL in lb, torque in ft-lb, dimensions in inches, weight in lb); metric rows are the HR-125M sheet (WLL in kg at the 5:1 and 4:1 design factors, dimensions in mm).
- Letters: A is the bolt, B the 'effective thread projection length' in the inch sheet; C to H are the sheet's own column letters. Neither sheet defines C to H in text (the drawing is an image), so no letter is interpreted here beyond its position, and in the metric copy the header letters were jumbled in the extracted text, so its columns are given in the order printed (B, C, D, E radius, F diameter, G, H) with the same caveat.
- Printed notes: ultimate load is 5 times the WLL (4.5 for the 7000 lb ring at 90°); bolts are Grade 8 alloy socket head cap screws to ASTM A574, long bolts are for soft metal such as aluminium, short bolts for ferrous work pieces only; frame 8 uses a hex head bolt. Torque values are for the supplied bolt. Use the maker's instructions; these are a size reference, not rigging advice.
- No file: the body is not defined by published numbers (letters undefined, bail and bushing shapes are not dimensioned), so a model would be invented. The thread is a plain bolt: the 'mating' rows list the thread sizes.
- McMaster-Carr's hoist-ring category is linked for per-part STEP; nothing is copied.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| mounting bolt thread | 5/16-18, 3/8-16, 1/2-13, 5/8-11, 3/4-10, 7/8-9, 1-8, 1-1/4-7, 1-1/2-6, 2-4-1/2, 2-1/2-4, 3-4, 3-1/2-4 UNC (HR-125); M8 to M48 (HR-125M) | tapped hole in the load with the same thread, engagement per the sheet's effective thread projection column B | designed | all |

## Sizes

| series | units | frame | WLL | torque (ft-lb) | bolt size A | B | C | D | E | F | G | H | weight each (lb) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HR-125 UNC | in / lb | 1 | 800 | 7 | 5/16 - 18 x 1.50 | .58 | 2.72 | .97 | .46 | .34 | 1.87 | 1.12 | .37 |
| HR-125 UNC | in / lb | 1 | 1000 | 12 | 3/8 - 16 x 1.50 | .58 | 2.72 | .97 | .46 | .34 | 1.87 | 1.05 | .39 |
| HR-125 UNC | in / lb | 2 | 2500 | 28 | 1/2 - 13 x 2.00 | .70 | 4.85 | 1.96 | .87 | .69 | 3.35 | 2.29 | 2.33 |
| HR-125 UNC | in / lb | 2 | 2500 | 28 | 1/2 - 13 x 2.50 | 1.20 | 4.85 | 1.96 | .87 | .69 | 3.35 | 2.29 | 2.36 |
| HR-125 UNC | in / lb | 2 | 4000 | 60 | 5/8 - 11 x 2.00 | .70 | 4.85 | 1.96 | .87 | .69 | 3.35 | 2.16 | 2.41 |
| HR-125 UNC | in / lb | 2 | 4000 | 60 | 5/8 - 11 x 2.75 | 1.45 | 4.85 | 1.96 | .87 | .69 | 3.35 | 2.16 | 2.47 |
| HR-125 UNC | in / lb | 2 | 5000 | 100 | 3/4 - 10 x 2.25 | .95 | 4.85 | 1.96 | .87 | .69 | 3.35 | 2.04 | 2.52 |
| HR-125 UNC | in / lb | 2 | 5000 | 100 | 3/4 - 10 x 2.75 | 1.45 | 4.85 | 1.96 | .87 | .69 | 3.35 | 2.04 | 2.59 |
| HR-125 UNC | in / lb | 3 | 7000 (4.5:1 tested at 90°) | 100 | 3/4 - 10 x 2.75 | .89 | 6.57 | 2.96 | 1.36 | .94 | 4.87 | 2.97 | 6.72 |
| HR-125 UNC | in / lb | 3 | 7000 (4.5:1 tested at 90°) | 100 | 3/4 - 10 x 3.50 | 1.64 | 6.57 | 2.96 | 1.36 | .94 | 4.87 | 2.97 | 6.81 |
| HR-125 UNC | in / lb | 3 | 8000 | 160 | 7/8 - 9 x 2.75 | .89 | 6.57 | 2.96 | 1.36 | .94 | 4.87 | 2.84 | 6.84 |
| HR-125 UNC | in / lb | 3 | 8000 | 160 | 7/8 - 9 x 3.50 | 1.64 | 6.57 | 2.96 | 1.36 | .94 | 4.87 | 2.84 | 6.96 |
| HR-125 UNC | in / lb | 3 | 10000 | 230 | 1 - 8 x 3.00 | 1.14 | 6.57 | 2.96 | 1.36 | .94 | 4.87 | 2.72 | 7.09 |
| HR-125 UNC | in / lb | 3 | 10000 | 230 | 1 - 8 x 4.00 | 2.14 | 6.57 | 2.96 | 1.36 | .94 | 4.87 | 2.72 | 7.31 |
| HR-125 UNC | in / lb | 4 | 15000 | 470 | 1-1/4 - 7 x 4.50 | 2.21 | 8.72 | 3.71 | 1.75 | 1.19 | 6.18 | 3.93 | 14.51 |
| HR-125 UNC | in / lb | 5 | 24000 | 800 | 1-1/2 - 6 x 6.75 | 2.73 | 12.55 | 4.71 | 2.39 | 1.75 | 8.48 | 5.52 | 37.73 |
| HR-125 UNC | in / lb | 5 | 30000 | 1100 | 2 - 4-1/2 x 6.75 | 2.73 | 12.55 | 4.71 | 2.39 | 1.75 | 8.48 | 5.02 | 40.69 |
| HR-125 UNC | in / lb | 6 | 50000 | 2100 | 2-1/2 - 4 x 8.0 | 4.00 | 16.88 | 5.75 | 3.00 | 2.25 | 11.00 | 8.03 | 88.00 |
| HR-125 UNC | in / lb | 7 | 75000 | 4300 | 3 - 4 x 10.5 | 5.00 | 19.50 | 7.25 | 3.75 | 2.75 | 14.16 | 8.50 | 166.00 |
| HR-125 UNC | in / lb | 8 | 100000 | 5100 | 3-1/2 - 4 x 13.0 (hex head bolt) | 7.00 | 22.09 | 7.75 | 4.00 | 3.25 | 15.91 | 9.28 | 265.00 |
| HR-125M metric | mm / kg | 1 | 400 (5:1); 500 (4:1) | — | M8x1.25x40 | 16.9 | 69.9 | 24.6 | 11.8 | 8.5 | 47.5 | 29.9 | — |
| HR-125M metric | mm / kg | 1 | 450 (5:1); 550 (4:1) | — | M10x1.50x40 | 16.9 | 69.9 | 24.6 | 11.8 | 8.5 | 47.5 | 28.1 | — |
| HR-125M metric | mm / kg | 2 | 1050 (5:1); 1300 (4:1) | — | M12x1.75x50 | 16.9 | 123 | 49.8 | 22.3 | 17.5 | 85.1 | 60.4 | — |
| HR-125M metric | mm / kg | 2 | 1900 (5:1); 2400 (4:1) | — | M16x2.00x60 | 26.9 | 123 | 49.8 | 22.3 | 17.5 | 85.1 | 56.3 | — |
| HR-125M metric | mm / kg | 2 | 2150 (5:1); 2700 (4:1) | — | M20x2.50x65 | 31.9 | 123 | 49.8 | 22.3 | 17.5 | 85.1 | 52.3 | — |
| HR-125M metric | mm / kg | 3 | 3000 (5:1); 3750 (4:1) | — | M20x2.50x75 | 27.8 | 167 | 75.2 | 34.7 | 25.4 | 124 | 76.6 | — |
| HR-125M metric | mm / kg | 3 | 4200 (5:1); 5250 (4:1) | — | M24x3.00x80 | 32.8 | 167 | 75.2 | 34.7 | 25.4 | 124 | 70.5 | — |
| HR-125M metric | mm / kg | 4 | 7000 (5:1); 8750 (4:1) | — | M30x3.50x120 | 61.7 | 222 | 94.2 | 44.5 | 30.5 | 157 | 102 | — |
| HR-125M metric | mm / kg | 5 | 11000 (5:1); 13750 (4:1) | — | M36x4.00x150 | 54.0 | 318 | 120 | 60.7 | 44.5 | 215 | 142 | — |
| HR-125M metric | mm / kg | 5 | 12500 (5:1); 15600 (4:1) | — | M42x4.50x160 | 64.0 | 318 | 120 | 60.7 | 44.5 | 215 | 136 | — |
| HR-125M metric | mm / kg | 5 | 13500 (5:1); 16900 (4:1) | — | M48x5.00x160 | 74.0 | 318 | 120 | 60.7 | 44.5 | 215 | 130 | — |

## Where the files are

- The Crosby Group: [HR-125 UNC swivel hoist rings: frame size, stock number, WLL, torque, bolt size A, B to H, weight (catalogue sheet 9999525)](https://www.thecrosbygroup.com/wp-content/uploads/2013/12/9999525.pdf) — web — Maker data sheet; numbers only. The letters are the sheet's own; its drawing is an image
- The Crosby Group (via M.E. Campbell copy): [HR-125M metric swivel hoist rings: frame, bolt size, WLL at 5:1 and 4:1, B to H in mm (© 2019)](https://www.mecampbell.com/media/pdf/CRB1016613spec.pdf) — web — Maker data sheet copy; numbers only. Header letters were jumbled in the extracted text
- McMaster-Carr: [Hoist rings (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/hoist-rings/) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)

## Questions

**What bolt does a 5000 lb Crosby HR-125 hoist ring use?**

3/4-10 UNC, 2.25 or 2.75 in long, tightened to 100 ft-lb, in frame size 2.

**What is the WLL of the M16 HR-125M hoist ring?**

1900 kg at the 5:1 design factor and 2400 kg at 4:1 (frame 2, M16x2.00x60).

**How much torque for a 1/2-13 hoist ring?**

28 ft-lb on the 2500 lb HR-125 sheet.

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