5/8-11 x 1 1/4 1960 Series 18-8 Stainless Steel Socket Head Cap Screw with Nylon Insert supports compact internal-hex fastening where a backed-out screw would create a service problem. The pellet presses against the mating thread to provide prevailing torque without changing the socket head geometry.
In HVAC equipment in humid plants, damper hardware, or service panels, the internal hex drive keeps installation compact while the insert adds thread-friction locking action. 18-8 stainless is a practical choice for ordinary moisture exposure, washdown-adjacent machinery, and equipment where a clean stainless finish is specified.
When chloride or saltwater exposure controls material selection, ask about 316 stainless nylon-insert cap screws as a non-catalog request. Cold Headers supports industrial maintenance and OEM sourcing teams when difficult-to-find stainless socket products are specified. The 1960 Series name identifies the modern ASME B18.3 head-proportion standard for socket head cap screws, successor to the older 1936 series, not a year of manufacture.
Technical Highlights
- Series: 1960 Series
- Material: 18-8 Stainless Steel
- Thread Size: 5/8-11
- Length: 1 1/4 in.
- Drive Type: Internal Hex
- Locking Feature: Nylon insert providing prevailing torque
- Nylon Insert Diameter (P): 3/16 in.
- Nylon Insert Location (N): 5/16 in. +/-1/2 pitch
- Head Dimensions: ASME B18.3, 1960 Series
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
