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Graco 102931 Hex Nut

The Graco 102931 Nut, Machine Hex is a small #8-32 threaded fastener used in Graco assemblies for secure mechanical connections.

  • Part Number: 102931
  • Thread Size: #8-32
  • Used In: Gun Flush Box Module (309227)
  • Function: General fastening in Graco equipment

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Overview & Specs — Graco 102931 (Nut, Machine Hex)

The Graco 102931 is a small hardware fastener identified as a Nut, machine, hex, #8-32. It is used in Graco assemblies where an 8-32 machine-screw thread is specified.

Compatible Machines

  • Graco Gun Flush Box Module (Assembly ref. 309227) — uses item “102931 Nut, machine, hex, 8-32”.

Additional Graco equipment may use this part wherever an 8-32 hex machine nut is called out in the official parts list. Always verify against your unit’s parts manual.

Key Specifications

Part Number 102931
Official Description Nut, Machine, Hex
Thread Size #8-32 machine screw thread
Function General fastening within Graco equipment assemblies and accessories

Fitment Guidance

  • Match the #8-32 thread requirement in your model’s parts diagram before ordering.
  • For assemblies not listed above, confirm the nut call-out number and thread spec in the model’s service manual.
  • If replacing a lost fastener, inspect mating screw/bolt for wear or damage and replace as needed.

Frequently Asked Questions

No. It’s a hex machine nut used for fastening. It does not sit in the fluid path.

The thread specification is #8-32 (machine screw thread).

The Gun Flush Box module (assembly reference 309227) explicitly calls out 102931 as an 8-32 hex machine nut. Other models may also use it if their parts manuals specify the same nut size.

For best results, use the exact Graco-specified part. While a generic #8-32 hex nut may fit mechanically, OEM parts help maintain correct fit and serviceability.

Check your model’s official parts list or service manual. Look for a nut call-out labeled 102931 or a specification of 8-32 hex machine nut at the relevant assembly location.

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