1960 Series Alloy Steel Socket Head Cap Screws with Nylon Insert

1960 Series alloy steel socket head cap screws with nylon insert combine the strength and compact design of an internal hex socket head cap screw with a factory-installed nylon locking element that provides prevailing torque during installation. The nylon insert increases resistance to loosening caused by vibration, repeated motion, and dynamic loading while allowing the fastener to remain removable for maintenance and service.

These socket head cap screws are commonly specified for machinery, automation equipment, fixtures, tooling, conveyor systems, robotics, power transmission equipment, industrial enclosures, pumps, gearboxes, maintenance repairs, and OEM assemblies where additional thread retention is desired without relying on separate locking devices. The internal hex drive allows installation where external wrench clearance is limited, while the cylindrical head provides high-strength clamping capability in compact designs.

Manufactured from alloy steel, these fasteners are intended for demanding mechanical applications requiring reliable clamping performance. Proper selection should consider thread size, screw length, available installation access, mating material, thread engagement, operating environment, and service requirements. The nylon insert is designed to provide prevailing torque but should not be considered a substitute for proper joint design or installation practices.

Cold Headers supplies 1960 Series alloy steel socket head cap screws with nylon insert in a broad range of inch thread sizes and lengths, including uncommon and difficult-to-source configurations. Individual product pages provide verified dimensional information to help engineers and purchasing professionals specify the correct fastener for industrial applications.

Why Choose a Nylon Insert Socket Head Cap Screw?

Factory-installed nylon insert: Provides prevailing torque to help resist thread loosening.
Internal hex drive: Allows installation where external wrench clearance is limited.
Alloy steel construction: Designed for demanding industrial mechanical applications.
Reusable threaded fastener: Suitable for assemblies that may require future service or maintenance.
Exact-size selection: Product pages provide verified thread size, length, head dimensions, and hex socket size where available.

Selecting the Correct Nylon Insert Socket Head Cap Screw

Begin by confirming the required thread size and screw length. Review the head dimensions, hex socket size, mating-thread specifications, installation access, and assembly requirements. Final fastener selection should reflect the mechanical loading, environmental conditions, and the desired level of prevailing torque for the application.

Cold Headers Inc. has supplied specialty industrial socket fasteners since 1962. Our catalog helps engineers, distributors, maintenance teams, and purchasing professionals locate exact sizes, uncommon lengths, and difficult-to-find socket head cap screws with nylon insert without unsupported inventory claims.

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

Unit of Measure

Items	SHCS-AS-NI 4-40 x 1/4 4-40 x 1/4 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert List Price (per 100 pieces) $72.75	SHCS-AS-NI 4-40 x 3/8 4-40 x 3/8 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert List Price (per 100 pieces) $72.50	SHCS-AS-NI 4-40 x 1/2 4-40 x 1/2 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert List Price (per 100 pieces) $72.75	SHCS-AS-NI 4-40 x 5/8 4-40 x 5/8 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert List Price (per 100 pieces) $73.00	SHCS-AS-NI 4-40 x 3/4 4-40 x 3/4 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert List Price (per 100 pieces) $73.25
Description	N/A 4-40 x 1/4 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert is a socket-driven cap screw for assemblies that need a built-in prevailing-torque feature. The nylon insert helps resist loosening through friction at the mating threads, providing prevailing torque without changing the socket head geometry. Common uses include machine guards, equipment covers, and service panels, where a precise socket head fastener with added loosening resistance can simplify maintenance and replacement planning. Review thread size, length, mating material, available drive access, and insert location before release to production or maintenance use. Cold Headers has supplied specialty socket fasteners since 1962 and supports exact-size sourcing for difficult-to-find socket products. Technical Highlights Series: 1960 Series Material: Alloy Steel Thread Size: 4-40 Length: 1/4 in. Drive Type: Internal Hex Locking Feature: Nylon insert providing prevailing torque Nylon Insert Diameter (P): 1/16 in. Nylon Insert Location (N): 7/64 in. +/- 1/2 pitch Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.	N/A For drawings calling out a nylon insert socket cap screw, the 4-40 x 3/8 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert provides exact thread-and-length identification. The nylon insert helps resist loosening through friction at the mating threads, providing prevailing torque without changing the socket head geometry. In automation equipment, robotic tooling, and fixture plates, the internal hex drive allows compact tool access while the alloy steel body keeps the product aligned with drawings that specify this material. Review thread size, length, mating material, available drive access, and insert location before release to production or maintenance use. Cold Headers has supplied specialty socket fasteners since 1962 and supports exact-size sourcing for difficult-to-find socket products. Technical Highlights Series: 1960 Series Material: Alloy Steel Thread Size: 4-40 Length: 3/8 in. Drive Type: Internal Hex Locking Feature: Nylon insert providing prevailing torque Nylon Insert Diameter (P): 1/16 in. Nylon Insert Location (N): 7/64 in. +/- 1/2 pitch Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.	N/A 4-40 x 1/2 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert combines alloy steel construction, an internal hex drive, and a nylon locking insert in one cataloged fastener. The insert adds prevailing-torque resistance through localized nylon contact, so the fastener can be considered where service conditions call for added loosening resistance. The 4-40 x 1/2 size is often reviewed for industrial equipment, material-handling systems, and machine frames when the bill of materials calls for an alloy steel cap screw with a nylon insert. Review thread size, length, mating material, available drive access, and insert location before release to production or maintenance use. Cold Headers has supplied specialty socket fasteners since 1962 and supports exact-size sourcing for difficult-to-find socket products. Technical Highlights Series: 1960 Series Material: Alloy Steel Thread Size: 4-40 Length: 1/2 in. Drive Type: Internal Hex Locking Feature: Nylon insert providing prevailing torque Nylon Insert Diameter (P): 1/16 in. Nylon Insert Location (N): 7/64 in. +/- 1/2 pitch Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.	N/A This 4-40 x 5/8 Alloy Steel Socket Head Cap Screw with Nylon Insert belongs to the Cold Headers 1960 Series for socket head cap screws with prevailing-torque nylon inserts. The insert adds prevailing-torque resistance through localized nylon contact, so the fastener can be considered where service conditions call for added loosening resistance. Common uses include tooling, inspection fixtures, and precision assemblies, where a precise socket head fastener with added loosening resistance can simplify maintenance and replacement planning. Selection should account for joint geometry, thread engagement, installation access, and whether a nylon insert is appropriate for the service environment. Cold Headers has supplied specialty socket fasteners since 1962 and supports exact-size sourcing for difficult-to-find socket products. Technical Highlights Series: 1960 Series Material: Alloy Steel Thread Size: 4-40 Length: 5/8 in. Drive Type: Internal Hex Locking Feature: Nylon insert providing prevailing torque Nylon Insert Diameter (P): 1/16 in. Nylon Insert Location (N): 7/64 in. +/- 1/2 pitch Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.	N/A 4-40 x 3/4 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert is a socket-driven cap screw for assemblies that need a built-in prevailing-torque feature. Its nylon insert creates a frictional locking action in the threaded joint while preserving top-side internal hex drive access for installation. In packaging machinery, conveyor equipment, and production cells, the internal hex drive allows compact tool access while the alloy steel body keeps the product aligned with drawings that specify this material. Selection should account for joint geometry, thread engagement, installation access, and whether a nylon insert is appropriate for the service environment. Cold Headers has supplied specialty socket fasteners since 1962 and supports exact-size sourcing for difficult-to-find socket products. Technical Highlights Series: 1960 Series Material: Alloy Steel Thread Size: 4-40 Length: 3/4 in. Drive Type: Internal Hex Locking Feature: Nylon insert providing prevailing torque Nylon Insert Diameter (P): 1/16 in. Nylon Insert Location (N): 7/64 in. +/- 1/2 pitch Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Brands	N/A Cold Headers, Inc.
Diameter	N/A 4-40
Length	N/A 1/4 in	N/A 3/8 in	N/A 1/2 in	N/A 5/8 in	N/A 3/4 in
Material	N/A Alloy Steel
Quantity	N/A 100
Package Type	N/A Box
Note	N/A