Grade 10.9 is alloy steel at 1000 MPa tensile / 900 MPa yield, typically supplied black oxide or Dacromet. Avoid electroplated zinc on 10.9 — acid pickling risks hydrogen embrittlement.
In stock now: 1,191 lines; covering Screws (1,029), Socket Head Screws (940), DIN7991 (400), ISO7380 (380), Flange Bolts (84); priced from $0.0052 per piece. Every line is sold by the piece — one piece is a valid order.
Related values on the same axis
140-170 HV 210-280HV30 420-545HV30 430-510HV 45H 460-560HV30 64 HRC A2-035 A2-50 A2-70
Product families covered
Screws 1,029 Socket Head Screws 940 DIN7991 400 ISO7380 380 Flange Bolts 84 Torx Screws 84 GB5789 84 Bolts 84 Anchors & Fastener Assemblies 78 Screw & Washer Assemblies 78 ISO7380 3-Piece Assemblies 78 Imperial Countersunk Hex Socket 48
Frequently asked
| Product | Diameter × Length | Material | Stock | Unit price | ||
|---|---|---|---|---|---|---|
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UN Countersunk Socket Screw 1/2 10B21 Carbon Steel
Black Oxide |
1/2 | 10B21 Carbon Steel | In stock | Log in to see prices | Log in to order |
![]() |
UN Countersunk Socket Screw 1/2 10B21 Carbon Steel
Black Oxide |
1/2 | 10B21 Carbon Steel | In stock | Log in to see prices | Log in to order |
