---
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: "160.14 DT"
currency: TND
in_stock: true
reviews_count: 10
category: "Hanson Rivet"
url: https://www.desertcart.tn/products/22390179-s31mg280-steel-pre-bulbed-shank-multi-grip-rivet-nut-gold
store_origin: TN
region: Tunisia
---

# Gold zinc anti-corrosion finish 5/16-18 thread size precision 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:** 160.14 DT
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock it down with confidence — the rivet nut pros trust!

## 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?** 160.14 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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

- • **Versatile Fit Range:** Accommodates materials from .020 to .280 inches thick for ultimate flexibility.
- • **Effortless Installation:** Compatible with manual and power tools for fast, hassle-free assembly.
- • **Unmatched Grip Strength:** Pre-bulbed shank ensures superior holding power in blind holes.
- • **Anti-Rotation Knurled Body:** Engineered to prevent spinning, guaranteeing secure fastening every time.
- • **Industrial-Grade Durability:** Alloy steel construction with gold zinc finish resists corrosion and wear.

## 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 blind hole fastening. Its knurled body prevents rotation, while the gold zinc finish offers corrosion resistance. Packaged in sets of 25, these alloy steel rivet nuts deliver industrial-grade strength and easy installation with manual or power tools, making them the go-to choice for professionals demanding reliable, high-performance fasteners.

## 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 | #141,715 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #172 in Rivet Nuts |
| Brand | Hanson Rivet |
| Color | YELLOW ZINC |
| Compatible Groove Diameter | 0.31 Inches |
| Customer Reviews | 4.8 out of 5 stars 307 Reviews |
| Drive Style | Spline |
| Exterior Finish | Zinc,Metal,Steel |
| Fastener Type | Hollow |
| Finish Types | Gold |
| Grade Rating | industrial |
| Inside Thread Size | 5/16 |
| Item Diameter | 0.31 Inches |
| Manufacturer | HANSON RIVET |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Maximum Shear Strength | 10000-25000 psi |
| Metal Type | Alloy Steel |
| Model | R-S31-280MG |
| Number Of Items | 25 |
| Number of Pieces | 25 |
| Part Number | R-S31-280MG |
| Screw Head Style | Knurled |
| Set Name | Pack of 25 |
| Size Name | 5/16-18 |
| Thread Class | Fine |
| Thread Size | 5/16"-18 |
| Thread Style | Internal |
| Thread Type | Unified National Coarse |
| Unit Count | 25.0 Count |

## 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 Tunisia*
*Store origin: TN*
*Last updated: 2026-07-26*