Lock Washer Helical: Hi Collar
MS51848-75 cres302 to MS51848-8 cres302
Helical spring lock washer dimensions per MIL-STD-1764 Section 506 — ID (min), OD (max), and section thickness for Regular (MS35338), Extra Duty (MS35340), and Hi-Collar (MS51848) series across bolt sizes #2 through 1-1/2 inch, in carbon steel (cadmium plate) and corrosion-resistant steel (CRES 302, 316, 420); supports bolt joint design, counterbore/clearance sizing, and military/aerospace fastener part selection
| series | record id | finish | id min in (in) | material | ms part number | nominal bolt designation | nominal bolt size in (in) | od max in (in) | standard | thickness in (in) |
|---|---|---|---|---|---|---|---|---|---|---|
| Hi Collar | MS51848-75 cres302 | Passivate | 0.763 | CRES 302 | MS51848-75 | 3/4 | 0.75 | 1.271 | MIL-STD-1764 Section 506 | 0.203 |
| Hi Collar | MS51848-87 carbon steel | Cadmium plate | 0.89 | Carbon Steel | MS51848-87 | 7/8 | 0.875 | 1.464 | MIL-STD-1764 Section 506 | 0.234 |
| Hi Collar | MS51848-87 cres302 | Passivate | 0.89 | CRES 302 | MS51848-87 | 7/8 | 0.875 | 1.464 | MIL-STD-1764 Section 506 | 0.234 |
| Hi Collar | MS51848-8 carbon steel | Cadmium plate | 0.168 | Carbon Steel | MS51848-8 | #8 | 0.164 | 0.293 | MIL-STD-1764 Section 506 | 0.047 |
| Hi Collar | MS51848-8 cres302 | Passivate | 0.168 | CRES 302 | MS51848-8 | #8 | 0.164 | 0.293 | MIL-STD-1764 Section 506 | 0.047 |
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