No 7. M39029/57-357 20# Socket Supersedes M39029/56-351 Terminals

M39029/57-357 Electrical Contact, MIL-DTL-39029 Series

The M39029/57-357 is an electrical contact (removable crimp contact) designed for use in standard circular connectors. It conforms to MIL-DTL-39029 series requirements. Note: MIL-DTL-39029 contacts are used as internal contact elements within connectors conforming to standards such as MIL-DTL-38999 / GJB599, MIL-DTL-26482, MIL-DTL-27484, MIL-DTL-27497, and MIL-DTL-27508. The contact itself is not a standalone connector and is not directly form-fit-function interchangeable with complete connectors from any standard. Confirm exact contact size, wire gauge range, and compatible connector insert arrangements with supplier.

This contact features MIL-DTL-39029 specification, slash number /57 (contact type/design variant — confirm exact pin or socket type with supplier), and part number 357 (confirm exact contact size and wire gauge range with supplier). The design supports crimp termination for reliable wire-to-contact interconnection.

Product Features

• Conformant to MIL-DTL-39029 contact specification
• Removable crimp contact for use in standard circular connectors (MIL-DTL-38999/GJB599, MIL-DTL-26482, MIL-DTL-27484, MIL-DTL-27497, MIL-DTL-27508, etc.)
• Slash number /57 — confirm exact contact type (pin or socket) with supplier
• Part number 357 — confirm exact contact size and wire gauge range with supplier
• Crimp termination for reliable wire-to-contact interconnection
• Not a standalone connector — internal contact element only

Technical Specifications - M39029/57-357

Part Number Breakdown

Related options: Mating contact of opposite gender (pin or socket) within the same M39029 slash number — confirm exact part number with supplier; alternative M39029 slash numbers for different contact sizes/wire gauges may be available. Important: The slash number /57 contact type (pin or socket) and part number 357 contact size/wire gauge range require supplier confirmation. M39029 contacts are internal contact elements used within standard circular connectors — confirm compatible connector insert arrangements and contact cavity sizes with supplier before ordering.

Compatible Applications

The M39029/57-357 contact is intended for use as a removable crimp contact within standard circular connectors. Typical use cases include:

• Internal contact element for MIL-DTL-38999/GJB599 Series III connectors
• Internal contact element for MIL-DTL-26482 Series 1 & 2 connectors
• Internal contact element for MIL-DTL-27484 (MS27484) connectors
• Internal contact element for MIL-DTL-27497 (MS27497) and MIL-DTL-27508 (MS27508) connectors
• Repair and maintenance of standard circular connectors (contact replacement)

Selection Guide

Installation Notes

• Verify slash number /57 contact type (pin or socket) and part number 357 contact size before installation. Confirm exact contact type and wire gauge range with supplier.
• Use the correct crimp tool and crimp cavity setting specified for this contact size (confirm with supplier).
• Strip wire to the correct length per MIL-DTL-39029 specification for this contact size.
• Insert the crimped contact into the correct contact cavity of the connector insert arrangement.
• Use the correct insertion/extraction tool for this contact size to install or remove the contact from the connector.
• Confirm that the contact is fully seated in the connector insert cavity before mating the connector.

Why Choose M39029/57-357

MIL-DTL-39029 Compliance

Choosing M39029/57-357 ensures compliance with MIL-DTL-39029 contact specification requirements. MIL-DTL-39029 contacts provide reliable crimp termination and are used as internal contact elements in a wide range of standard circular connectors. Confirm the slash number /57 contact type (pin or socket), part number 357 contact size, wire gauge range, and compatible connector insert arrangements with supplier.

Ordering Information

Order by the designation M39029/57-357. When requesting a quote, please confirm contact type (pin or socket), contact size, wire gauge range, contact plating, compatible connector insert arrangements, required crimp tooling, and required quantity.