---
product_id: 22390179
title: "S31MG280 Steel PRE-BULBED Shank, Multi-Grip Rivet-NUT Gold ZINC Finish, 5/16-18 X .020-.280 Grip Range (Pack of 25)"
brand: "hanson rivet"
price: "€ 40.70"
currency: EUR
in_stock: true
reviews_count: 10
category: "Hanson Rivet"
url: https://www.desertcart.pt/products/22390179-s31mg280-steel-pre-bulbed-shank-multi-grip-rivet-nut-gold
store_origin: PT
region: Portugal
---

# 5/16-18 thread size precision Knurled anti-rotation body Wide .020-.280 grip range S31MG280 Steel PRE-BULBED Shank, Multi-Grip Rivet-NUT Gold ZINC Finish, 5/16-18 X .020-.280 Grip Range (Pack of 25)

**Brand:** hanson rivet
**Price:** € 40.70
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your fastening game with grip that won’t quit!

## Quick Answers

- **What is this?** S31MG280 Steel PRE-BULBED Shank, Multi-Grip Rivet-NUT Gold ZINC Finish, 5/16-18 X .020-.280 Grip Range (Pack of 25) by hanson rivet
- **How much does it cost?** € 40.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/22390179-s31mg280-steel-pre-bulbed-shank-multi-grip-rivet-nut-gold)

## Best For

- hanson rivet enthusiasts

## Why This Product

- Trusted hanson rivet brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Pack Efficiency:** Pack of 25 rivet-nuts keeps your workflow uninterrupted and your toolkit ready for any challenge.
- • **Effortless Installation:** Compatible with manual and power tools for quick, reliable fastening that saves you time on every job.
- • **Unmatched Grip Strength:** Pre-bulbed shank design ensures superior holding power in blind holes, outperforming standard rivet-nuts.
- • **Durable Gold Zinc Finish:** Corrosion-resistant coating guarantees long-lasting performance and professional-grade aesthetics.
- • **Versatile Fit for Every Project:** Wide grip range (.020-.280) adapts seamlessly to metal and diverse materials, reducing inventory needs.

## Overview

The S31MG280 Steel Pre-Bulbed Multi-Grip Rivet-NUT features a 5/16-18 thread size and a wide grip range of .020 to .280 inches, designed for superior holding power in blind holes. Its knurled body prevents rotation, while the gold zinc finish offers corrosion resistance. Sold in packs of 25, these alloy steel fasteners are compatible with manual and power tools, making them a versatile and durable choice for professional-grade fastening.

## Description

S31MG280 STEEL PRE-BULBED SHANK, MULTI-GRIP RIVET-NUT GOLD ZINC FINISH, 5/16-18 X .020-.280 GRIP RANGE (PACK OF 25)

Review: Pre-bulbed is the best. - With pre bulged rivenuts you get a Much better result. Most tool “kits” come with standard ones. They don’t grip as well. If holding power is critical these are great.
Review: Grippys - Was using standard rivnuts, and they worked well, but I wanted something with more surface area. I tried these and they worked great. I have more confidence in the amount of surface area these use. Will certinly reach for these over the other version when possible.

## Features

- 5/16-18 THREAD SIZE
- FASTENS IN BLIND HOLES
- KNURLED BODY FOR ANTI-ROTATION
- WIDE GRIP RANGE FOR METAL AND OTHER MATERIALS
- EASY INSTALLATION WITH MANUAL OR POWER TOOLS

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B010GQXPIQ |
| Best Sellers Rank | #119,231 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #153 in Rivet Nuts |
| Brand | Hanson Rivet |
| Color | YELLOW ZINC |
| Date First Available | June 29, 2015 |
| Exterior Finish | Zinc,Metal,Steel |
| Fastener Type | Hollow |
| Finish Type | Gold |
| Inside Thread Size | 5/16 |
| Is Discontinued By Manufacturer | No |
| Item Diameter | 0.31 Inches |
| Item Weight | 10.2 ounces |
| Item model number | R-S31-280MG |
| Manufacturer | HANSON RIVET |
| Material | Alloy Steel |
| Maximum Shear Strength | 10000-25000 psi |
| Metal Type | Alloy Steel |
| Number of Pieces | 25 |
| Set Name | Pack of 25 |
| Size | 5/16-18 |
| Thread Class | Fine |
| Thread Size | 5/16"-18 |
| Thread Style | Internal |
| Thread Type | Unified National Coarse |

## Product Details

- **Color:** YELLOW ZINC
- **Exterior Finish:** Zinc,Metal,Steel
- **Fastener Type:** Hollow
- **Material:** Alloy Steel
- **Thread Size:** 5/16"-18

## Images

![S31MG280 Steel PRE-BULBED Shank, Multi-Grip Rivet-NUT Gold ZINC Finish, 5/16-18 X .020-.280 Grip Range (Pack of 25) - Image 1](https://m.media-amazon.com/images/I/61I78HvVfaL.jpg)
![S31MG280 Steel PRE-BULBED Shank, Multi-Grip Rivet-NUT Gold ZINC Finish, 5/16-18 X .020-.280 Grip Range (Pack of 25) - Image 2](https://m.media-amazon.com/images/I/41lTNlPAUvL.jpg)

## Questions & Answers

**Q: What is the load strength on these?  1500lbs?**
A: Not sure but would depend mostly on the strength of the metal you put it into.

**Q: Do you need a special tool for this or can you just screw a bolt in and go?**
A: Can't screw the bolt in and go. You're supposed to have a special tool but my husband devised his own.

**Q: How will I know when to stop tightening these into my base material? I'm installing with a ratchet wrench, is there a torque I can set my wrench to?**
A: There's no actual torque setting, but typically when setting the insert,  and being that the insert is pre-bulbed, once the insert is tight you will feel a noticeable increase in turning pressure - signifying the insert is tight.

**Q: Does this come with the small setting tool**
A: No. I didn’t receive a tool. I used a bigger size nut and washer to set on top and screwed bolt into shank to set them.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Pre-bulbed is the best.
*by G***T on May 21, 2024*

With pre bulged rivenuts you get a Much better result. Most tool “kits” come with standard ones. They don’t grip as well. If holding power is critical these are great.

### ⭐⭐⭐⭐⭐ Grippys
*by D***. on November 26, 2025*

Was using standard rivnuts, and they worked well, but I wanted something with more surface area. I tried these and they worked great. I have more confidence in the amount of surface area these use. Will certinly reach for these over the other version when possible.

### ⭐⭐⭐⭐⭐ Work as they should
*by J***Y on October 2, 2024*

They hold items together.

## Frequently Bought Together

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-16*