3/8-16 x 2 1/4 18-8 Stainless Steel Flat Head Cap Screw with Nylon Insert should be ordered by total screw length because the head is part of the measurement. Overall-length measurement matters on countersunk joints because the head occupies part of the thickness stack. When installed in the correct countersink, the flat head leaves little exposed hardware for covers, panels, or moving material to catch.

This size is often reviewed for washdown covers, processing guards, and inspection doors when stainless material, a flush head, and locking friction are all specified. Where strength matters more than stainless material, Alloy Steel Flat Head Socket Cap Screws with Nylon Insert may be the better route.

Because the locking element is nylon, confirm the service temperature separately from the stainless screw selection; this listing does not state a limit. Cold Headers can handle supported non-catalog pellet-size requests through in-house pelletizing.

Technical Highlights

• Material: 18-8 Stainless Steel
• Thread Size: 3/8-16
• Length (overall - includes head): 2 1/4 in.
• Head Style: 82° Countersunk Flat
• Drive Type: Internal Hex
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 9/64 in.
• Nylon Insert Location (N): 7/32 in. +/-1/2 pitch
• Head Dimensions: ASME B18.3

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.