Hobson did you know flyer
Neptune Flat Round Washer, 316 Stainless, M5 to M30: Did You Know
A one-page Hobson Did You Know flyer on the Neptune flat round washer in 316 stainless steel. It lists each bolt size with outside diameter, hole size, thickness and pack quantity.
What this covers
- Grade and hardness
- Sizes and dimensions
- Pack quantities
Applies to Flat Washer and Safety / Vibration-Lock Washer.
Key things to remember
The essentials from this document in plain words. Check the full document before you rely on a figure.
- 316 stainless, marked HEC 125A, A4-80, 200HV hardness.
- Sizes M5 to M30 (WR16NM05 to WR16NM30).
- Examples: M10 washer 19.48mm outside, 10.5mm hole, 1.8mm thick; M12 23.48mm, 13.0mm, 2.3mm; M20 36.38mm, 21.0mm, 2.7mm.
- Packs of 100 for most sizes, 200 for M5 and 20 for M30. A test certificate or report is available for this product.
Who it helps: Builders and fabricators matching washers to A4-80 stainless bolts.
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This document is published by Hobson Engineering, who supply this range to us. We show it here in full so you can read it next to the product; the summary above is ours. Read it on this page or download the PDF. For the most current version, ask us.
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